CBSE Class 12 Physics Quiz! Test

30 Questions | Total Attempts: 5374  Settings  .

• 1.
The name electricity is coined from the Greek word __________meaning amber
• A.

Elektron

• B.

Electron

• C.

Electrion

• D.

Elektrion

• 2.
_______________ offer resistance to the movement of charges which is intermediate between the conductors and insulators.
• A.

Dielectric

• B.

Nonconductors

• C.

Semiconductors

• D.

Nonmetals

• 3.
The degree of _____________ is an indicator of the amount of charge.
• A.

Polarity

• B.

Divergence

• C.

Positive charge

• D.

Negative charge

• 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

• 5.
Coulomb used a torsion balance. A torsion balance is a sensitive device to measure ________.
• A.

Charge

• B.

Elecricity

• C.

Polarity

• D.

Force

• 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

• 7.
Electric field is a --------------field, since force is a------------ quantity
• A.

Vector,Vector

• B.

Scalar,Vector

• C.

Vector,Scaler

• D.

Scalar,Scalar

• 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

• 9.
Two field lines can never cross each other.
• A.

True

• B.

False

• 10.
The field of the electric dipole is--------
• A.

Zero

• B.

Notzero

• C.

Uncertain

• D.

Infinity

• 11.
A plane perpendicular to the dipole axis through its centre.
• A.

S-plane

• B.

Xy plane

• C.

Perpendicular plane

• D.

Equatorial plane

• 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

• 13.
The volume charge density also called as -----------
• A.

Field density

• B.

Volume density

• C.

Charge density

• D.

Charged density

• 14.
∆s Denotes---------
• A.

Vector area element

• B.

Electric field

• C.

Electric flux

• D.

Electric charge

• 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

• 16.
Coulomb force and gravitational force follow the same ----------
• A.

Square law

• B.

Inverse square law

• C.

Inverse law

• D.

Newton's law

• 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

• 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

• 19.
In a non-polar molecule, the centres of positive and negative charges coincide.
• A.

FALSE

• B.

TRUE

• 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

• 21.
Which is typically the order of magnitude of currents in domestic appliances?
• A.

Ampere

• B.

Field

• C.

Mobility

• D.

Voltage

• 22.
A gram of water contains approximately 10^22 ------------
• A.

Electrons

• B.

Charged nuclei

• C.

Atom

• D.

Molecules

• 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.

• B.

G.S. Ohm

• C.

Van de Graff

• D.

Kirchoff

• 24.
I/A, is called --------
• A.

Current intensity

• B.

Magnetic field density

• C.

Current density

• D.

Magnetic field density

• 25.
The collisions of the electrons occur at regular intervals
• A.

False

• B.

True

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