Question types

Electro-Magnetism question types

171 questions across 6 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

171
Questions
6
Question groups
5
Question types
Sample Questions

Electro-Magnetism questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

A transformer is designed to work from a 240 V a.c. mains and to give a supply of 8 V to ring
a house–bell. The primary coil has 4800 turns. How many turns will be in the secondary coil?
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(a) How would you demonstrate that a momentary current can be obtained by the suitable use of a magnet, a coil of wire and a galvanometer?
(b) What is the source of energy associated with the current obtained in part(a)?
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Q 22MCQ1 Mark
The direction of induced current is obtained by:
  • Fleming's left hand rule
  • B
    Clock rule
  • C
    Right hand thumb rule
  • D
    Right hand thumb rule

Answer: A.

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Q 23MCQ1 Mark
In an electric motor the energy transformation is
  • A
    From electrical to chemical
  • B
    From chemical to light
  • C
    From mechanical to electrical
  • From electrical to mechanical

Answer: D.

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Q 24MCQ1 Mark
By reversing the direction of current in a wire, the magnetic field produced by it:
  • Gets reversed in direction
  • B
    Increases in strength
  • C
    Decreases in strength
  • D
    Remains unchanged in strength and direction

Answer: A.

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Q 25MCQ1 Mark
The present of magnetic field at a point can be detected by :
  • A
    A strong magnet
  • B
    A solenoid
  • A compass needle
  • D
    A current carrying wire

Answer: C.

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