CBSE Class 12 Physics Quiz Test
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Prepare for success in your Class 12 Physics exam with our interactive quiz! Test your knowledge on key topics, from electromagnetism to quantum mechanics. Our quiz is designed to reinforce your understanding of fundamental principles, equations, and concepts crucial for Class 12 Physics. Whether you're reviewing for an upcoming test or aiming for top scores, our quiz provides a challenging and insightful way to assess your proficiency. Dive into the world of physics, tackle questions with confidence, and track your progress. Elevate your learning experience with our Class 12 Physics Quiz – the perfect tool to enhance your exam Read morereadiness!
- 1.
The name electricity is coined from the Greek word __________meaning amber
- A.
Elektron
- B.
Electron
- C.
Electrion
- D.
Elektrion
Correct Answer
A. ElektronExplanation
Elektron is a greek word that coins electricityRate this question:
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- 2.
_______________ offer resistance to the movement of charges which is intermediate between the conductors and insulators.
- A.
Dielectric
- B.
Nonconductors
- C.
Semiconductors
- D.
Nonmetals
Correct Answer
C. SemiconductorsExplanation
They have temperature dependent characterticsRate this question:
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- 3.
The degree of _____________ is an indicator of the amount of charge.
- A.
Polarity
- B.
Divergence
- C.
Positive charge
- D.
Negative charge
Correct Answer
B. DivergenceExplanation
When a charged object touches the metal knob at the top of the rod, charge flows on to the leaves and theyRate this question:
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- 4.
Charge,e =
- A.
1.602192 × 10^–9 C
- B.
1.602192 × 10^–19 C
- C.
1.602192 × 10^+19 C
- D.
1.602192 × 10^+9 C
Correct Answer
B. 1.602192 × 10^–19 CExplanation
one coulomb is the charge flowing through a wire in 1 s if the current is 1 A (ampere)Rate this question:
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- 5.
Coulomb used a torsion balance. A torsion balance is a sensitive device to measure ________.
- A.
Charge
- B.
Elecricity
- C.
Polarity
- D.
Force
Correct Answer
D. ForceExplanation
Coulomb used torsion balance only for measuring the force between two charged metallic spheresRate this question:
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- 6.
The charge q, which tests the effect of a source charge, is called___________
- A.
Postive Charge
- B.
Negative charge
- C.
Auxilary charge
- D.
Test charge
Correct Answer
D. Test chargeExplanation
The source charge Q must remain at its original locationRate this question:
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- 7.
Electric field is a --------------field, since force is a------------ quantity
- A.
Vector,Vector
- B.
Scalar,Vector
- C.
Vector,Scaler
- D.
Scalar,Scalar
Correct Answer
A. Vector,VectorExplanation
"The term field in physics generally refers to a quantity that is
defined at every point in space and may vary from point to point."Rate this question:
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- 8.
The picture of field lines was invented by Faraday,called---------
- A.
Line of Field
- B.
Line of force
- C.
Line of charge
- D.
Line of falls
Correct Answer
B. Line of forceExplanation
"The picture of field lines was invented by Faraday to develop an
intuitive non- mathematical way of visualizing electric fields around charged configurations. Faraday called them lines of force."Rate this question:
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- 9.
Two field lines can never cross each other.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
"If they did, the field at the point of intersection will not have a
unique direction, which is absurd."Rate this question:
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- 10.
The field of the electric dipole is--------
- A.
Zero
- B.
Notzero
- C.
Uncertain
- D.
Infinity
Correct Answer
B. NotzeroExplanation
The total charge of the electric dipole is obviously zero. This does notmean that the field of the electric dipole is zeroRate this question:
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- 11.
A plane perpendicular to the dipole axis through its centre.
- A.
S-plane
- B.
Xy plane
- C.
Perpendicular plane
- D.
Equatorial plane
Correct Answer
D. Equatorial planeExplanation
The equatorial plane of the dipole,i.e., on a plane perpendicular to the dipole axis through its centre.Rate this question:
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- 12.
The centres of positive charges and of negative charges lie at the same place,their dipole moment is -----------.
- A.
Uncertain
- B.
Zero
- C.
Not zero
- D.
Infinity
Correct Answer
B. ZeroExplanation
In most molecules, the centres of positive charges and of negative charges lie at the same place. Therefore, their dipole moment is zero.Rate this question:
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- 13.
The volume charge density also called as -----------
- A.
Field density
- B.
Volume density
- C.
Charge density
- D.
Charged density
Correct Answer
C. Charge densityExplanation
sometimes simply called charge densityRate this question:
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- 14.
∆s Denotes---------
- A.
Vector area element
- B.
Electric field
- C.
Electric flux
- D.
Electric charge
Correct Answer
A. Vector area elementExplanation
According to physical quantity it denotes vector area elementRate this question:
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- 15.
Linear Charge density is --,surface Charge density is --,volume Charge density is --.
- A.
ρ,λ,σ
- B.
λ,ρ,σ
- C.
λ,σ,ρ
- D.
σ,ρ,λ
Correct Answer
C. λ,σ,ρExplanation
conventional symbolsRate this question:
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- 16.
Coulomb force and gravitational force follow the same ----------
- A.
Square law
- B.
Inverse square law
- C.
Inverse law
- D.
Newton's law
Correct Answer
B. Inverse square lawExplanation
Coulomb force and gravitational force follow the same inverse-square lawRate this question:
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- 17.
Superposition principle,there are ----additional three-body, four-body, etc., forces which arise only when there are more than two charges
- A.
Few
- B.
No
- C.
More
- D.
None of the above
Correct Answer
B. NoExplanation
Based on Superposition principle.Rate this question:
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- 18.
"The electric field due to a charge configuration with total charge zero is not zero; but for distances large compared to the size of the configuration, its field falls off faster than 1/r2, typical of field due to a single charge".Give example for above fact.
- A.
Electric charge
- B.
Electirc density
- C.
Electric dipole moment
- D.
Electric dipole
Correct Answer
D. Electric dipoleExplanation
An electric dipole is the simplest exampleRate this question:
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- 19.
In a non-polar molecule, the centres of positive and negative charges coincide.
- A.
FALSE
- B.
TRUE
Correct Answer
B. TRUEExplanation
Nature of non-polar molecules.Rate this question:
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- 20.
Two large plane parallel conducting plates separated by a small distance.
- A.
Parallel plane capacitors
- B.
Serial plate capacitors
- C.
Parallel plate capacitors
- D.
Serial plane capacitors
Correct Answer
C. Parallel plate capacitorsExplanation
A parallel plate capacitor consists of two large plane parallel conducting plates.Rate this question:
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- 21.
Which is typically the order of magnitude of currents in domestic appliances?
- A.
Ampere
- B.
Field
- C.
Mobility
- D.
Voltage
Correct Answer
A. AmpereExplanation
An ampere is defined through magnetic effects of currentsRate this question:
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- 22.
A gram of water contains approximately 10^22 ------------
- A.
Electrons
- B.
Charged nuclei
- C.
Atom
- D.
Molecules
Correct Answer
D. MoleculesExplanation
Bulk matter is made up of many molecules.Rate this question:
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- 23.
A basic law regarding flow of currents was discovered by------------in 1828, long before the physical mechanism responsible for flow of currentswas discovered.
- A.
Faraday
- B.
G.S. Ohm
- C.
Van de Graff
- D.
Kirchoff
Correct Answer
B. G.S. OhmExplanation
based on ohm's bibliographyRate this question:
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- 24.
I/A, is called --------
- A.
Current intensity
- B.
Magnetic field density
- C.
Current density
- D.
Magnetic field density
Correct Answer
C. Current densityExplanation
j= I/A (i.e) current densityRate this question:
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- 25.
The collisions of the electrons occur at regular intervals
- A.
False
- B.
True
Correct Answer
A. FalseExplanation
"since, the direction of the velocity of an electron is completely
random."Rate this question:
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- 26.
Relaxation time is denoted using---------
- A.
σ
- B.
τ
- C.
λ
- D.
ρ
Correct Answer
B. τExplanation
Standard denotion.Rate this question:
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- 27.
Give an example of a material exhibiting behaviour such as relation between V and I is not unique
- A.
Glass
- B.
Pure water
- C.
NaCl
- D.
GaAs
Correct Answer
D. GaAsExplanation
In GaAs,there is more than one value of V for the same current IRate this question:
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- 28.
Which exhibit a very weak dependence of resistivity with temperature?
- A.
Nickel
- B.
Pure water
- C.
Nichrome
- D.
Iron
Correct Answer
C. NichromeExplanation
which is an alloy of nickel, iron and chromium.Rate this question:
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- 29.
State Ohmic loss
- A.
VxI
- B.
I^2 x R
- C.
IV∆t
- D.
IxR
Correct Answer
B. I^2 x RExplanation
Using ohm's law P=I^2 x RRate this question:
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- 30.
Emf is __________
- A.
Electromotive force
- B.
Electromagnetic force
- C.
Electromechnical force
- D.
Electricmechical force
Correct Answer
A. Electromotive forceExplanation
General abbrevationRate this question:
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- 31.
Kirchhoff’s rules
- A.
Junction rule & loop rule
- B.
Junctional rule & loop rule
- C.
Mesh rule & node rule
- D.
Loop rule & node rule
Correct Answer
A. Junction rule & loop ruleExplanation
Termed as junction & loop rule.Rate this question:
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- 32.
The ------------ and its balance condition provide a practical method for determination of an unknown resistance
- A.
Ammetre
- B.
Potentiometre
- C.
Metre bridge
- D.
Wheatstone bridge
Correct Answer
D. Wheatstone bridgeExplanation
It only uses balance condition to find the resistanceRate this question:
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- 33.
Which one of these is used to measure internel resitance of a cell
- A.
Wheatstone bridge
- B.
Ammetre
- C.
Potentiometre
- D.
Metre bridge
Correct Answer
C. PotentiometreExplanation
For this the cell (emf e ) whose internal resistance (r) is to be determined isconnected across a resistance box through a key K2.Rate this question:
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- 34.
__________= 1V/A
- A.
1℮
- B.
1Ω
- C.
1ρ
- D.
1σ
Correct Answer
B. 1ΩExplanation
unit of resistance.Rate this question:
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- 35.
The algebraic sum of changes in potential around any closed loop must be-----
- A.
Negative
- B.
Positive
- C.
Zero
- D.
All the above
Correct Answer
C. ZeroExplanation
based on loop rule.Rate this question:
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- 36.
Current is a Vector Quantity
- A.
FALSE
- B.
TURE
Correct Answer
A. FALSEExplanation
Current is a scalar although we represent current with an arrow.Rate this question:
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- 37.
silver is a ---------conductor
- A.
Non
- B.
Heterogeneous
- C.
Non-Homogeneous
- D.
Homogeneous
Correct Answer
D. HomogeneousExplanation
silver consists of homogeneous molecules.Rate this question:
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- 38.
Kirchhoff’s --------- is based on conservation of charge
- A.
Loop rule
- B.
Junction rule
- C.
Loop & junction rule
- D.
Either junction or loop rule
Correct Answer
B. Junction ruleExplanation
since Bending or reorienting the wire does not change the validity of Kirchhoff’s junction rule.Rate this question:
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- 39.
A current or a field (electric or magnetic) emerging out of the plane of the paper is depicted by -----
- A.
Dot
- B.
Cross
- C.
Both dot & cross
- D.
Neither cross nor dot
Correct Answer
A. DotExplanation
According dot rule.Rate this question:
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- 40.
The radius of the circular component of motion is called the radius of the -------.
- A.
Rectangular
- B.
Circular
- C.
Helix
- D.
Hyperbola
Correct Answer
C. HelixExplanation
Due to generic motionRate this question:
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- 41.
The cyclotron uses----------- to increase the energy of charged particles.
- A.
Electric field
- B.
Magnetic field
- C.
Magnetostatic field
- D.
Both electric &magnetic fields
Correct Answer
D. Both electric &magnetic fieldsExplanation
both electric and magnetic fields in combination is used to increase the energy of charged particles.Rate this question:
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- 42.
In cyclotron, as the fields are perpendicular to each other are called ------------
- A.
Perpendicular field
- B.
Crossed fields
- C.
Cyclotron field
- D.
Magnetic field
Correct Answer
B. Crossed fieldsExplanation
There are generally called as crossed fields.Rate this question:
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- 43.
VECC is------
- A.
Variable energy cyclotron center
- B.
variation energy cyclotron center
- C.
Variant energy cyclotron center
- D.
Various energy cyclotron center
Correct Answer
A. Variable energy cyclotron centerExplanation
Since the variable energy cyclotron was build in VECC, kolkata.Rate this question:
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- 44.
In Biot-Savart’s law the relation between --------- and ------- field it produces.
- A.
Current & electric
- B.
Current & magnetic
- C.
Electric & magnetic
- D.
Magnetic& dielectric
Correct Answer
B. Current & magneticExplanation
based on biot savart law's statementRate this question:
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- 45.
According to amperain loop, B is -----------
- A.
Only tangential
- B.
Only normal
- C.
Tangential or normal
- D.
Both tangential and normal
Correct Answer
C. Tangential or normalExplanation
based on assumption made in amperian loop B is tangetial or normal or vanish.Rate this question:
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- 46.
Ampere's circuital law holds for----------
- A.
Steady current
- B.
Steady voltage
- C.
Flucuating current
- D.
Flucuating voltage
Correct Answer
A. Steady currentExplanation
According to ampere circuital alwRate this question:
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- 47.
Television uses the --------- to generate the magnetic fields needed.
- A.
Toroid or solenoid
- B.
Both solenoid & toroid
- C.
Toroid
- D.
Solenoid
Correct Answer
D. SolenoidExplanation
Television only uses solenoid.Rate this question:
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- 48.
The resembalance of magnertic field lines for abar magnet and a ------------- suggest that a bar magnet may be thought of as a large number of circulating current in analogy with a ----------. HINT:bar magnet as an equalent solenoid.
- A.
Solenoid, toroid
- B.
Toroid,toroid
- C.
Solenoid,solenoid
- D.
Toroid, solenoid
Correct Answer
C. Solenoid,solenoidExplanation
bar magnet as an equalent solenoid.Rate this question:
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- 49.
The magnet field lines gives us an approximate idea of the magnetic field B.
- A.
Pattern of electric fillings
- B.
Pattern of magnetic fillings
- C.
Pattern of dipole fillings
- D.
Pattern of iron fillings
Correct Answer
D. Pattern of iron fillingsExplanation
A dipole in an uniform magnetic field.Rate this question:
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- 50.
Externel field: torque (in-terms of electrostatics)---------,externel field:energy(in-terms of magnetism)------.
- A.
PE,-B
- B.
PE,-E
- C.
MB,-E
- D.
PE,mB
Correct Answer
A. PE,-BExplanation
By use of dipole analogy.Rate this question:
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