Question types

6. Electromagnetic induction question types

978 questions across 1 question group — pick any mix to generate a Physics paper with step-by-step answer keys.

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Sample Questions

6. Electromagnetic induction questions

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

In the above diagram, a strong bar magnet is moving towards solenoid-$2$ from solenoid-$1$. The direction of induced current in solenoid-$1$ and that in solenoid-$2$, respectively, are through the directions:
  • A
    $B A$ and $C D$
  • B
    $A B$ and $C D$
  • C
    $B A$ and $D C$
  • $A B$ and $D C$

Answer: D.

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In an ideal transformer, the turns ratio is $\frac{N_p}{N_S}=\frac{1}{2}$. The ratio $V_s: V_p$ is equal to (the symbols carry their usual meaning):
  • $2: 1$
  • B
    $1: 1$
  • C
    $1: 4$
  • D
    $1: 2$

Answer: A.

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The magnetic energy stored in an inductor of inductance $4\,\mu H$ carrying a current of $2\,A$ is :
  • $8\,\mu J$
  • B
    $4\,\mu J$
  • C
    $4\,mJ$ 
  • D
    $8\,mJ$ 

Answer: A.

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A $12\,V,60\,W$ lamp is connected to the secondary of a step down transformer, whose primary is connected to ac mains of $220\,V$. Assuming the transformer to be ideal, $..........\,A$ is the current in the primary winding.
  • A
    $0.37$
  • $0.27$
  • C
    $2.7$
  • D
    $3.7$

Answer: B.

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A square loop of side $1\,m$ and resistance $1\,\Omega$ is placed in a magnetic field of $0.5\,T$. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is $\dots\dots$ webar
  • $0.5$ 
  • B
    $1$ 
  • C
    zero 
  • D
    $2$ 

Answer: A.

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