Physics Quiz: Effects Of Electric Current Trivia Questions!
- 1.
Joule’s law of heating is (1) (2) (3) (4)- A.
(3)
- B.
(1)
- C.
(2)
- D.
(4)
- 2.Nichrome wire is used as the heating element because it has
- A.
High specific resistance
- B.
Low melting point
- C.
Low specific resistance
- D.
High conductivity
- 3.Peltier coefficient at a junction of a thermocouple depends on
- A.
The temperature of the junction
- B.
The charge that passes through the thermocouple
- C.
The time for which current flows
- D.
The current in the thermocouple
- 4.
In a thermocouple, the temperature of the cold junction is , the neutral temperature is . The temperature of inversion is
- A.
(1)
- B.
(2)
- C.
(3)
- D.
(4)
- 5.
Which of the following equations represents Biot-savart law? (1) (2) (3) (4)
- A.
(4)
- B.
(3)
- C.
(1)
- D.
(2)
- 6.
Magnetic induction due to an infinitely long straight conductor placed in a medium of permeability μ is
- A.
(4)
- B.
(2)
- C.
(3)
- D.
(1)
- 7.
In a tangent galvanometer, for a constant current, the deflection is . The plane of the coil is rotated through . Now, for the same current, the deflection will be
- A.
(4)
- B.
(2)
- C.
(1)
- D.
(3)
- 8.The period of revolution of a charged particle inside a cyclotron does not depend on
- A.
The velocity of the particle
- B.
The magnetic induction
- C.
The charge of the particle
- D.
The mass of the particle
- 9.The torque on a rectangular coil placed in a uniform magnetic field is large, when
- A.
the number of turns is large
- B.
The number of turns is less
- C.
The plane of the coil is perpendicular to the field
- D.
The area of the coil is small
- 10.Phosphor – bronze wire is used for suspension in a moving coil galvanometer, because it has
- A.
Small couple per unit twist
- B.
High conductivity
- C.
Large couple per unit twist
- D.
High resistivity
- 11.Of the following devices, which has small resistance?
- A.
Ammeter of range 0–10 A
- B.
Ammeter of range 0 – 1A
- C.
Voltmeter
- D.
Moving coil galvanometer
- 12.A galvanometer of resistance G Ω is shunted with S Ω .The effective resistance of the combination is Ra. Then, which of the following statements is true?
- A.
Ra is less than both G and S
- B.
S is less than Ra but greater than G.
- C.
S is less than both G and Ra
- D.
G is less than S
- 13.An ideal voltmeter has
- A.
infinite resistance
- B.
Zero resistance
- C.
Finite resistance less than G but greater than Zero
- D.
Resistance greater than G but less than infinity
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