Electromagnetism

Appeared in 10 of the 11 available papers.

Examined in

10 of 11 papers

Appears almost every year — treat as core

Typically worth

7.5 marks

Average per paper it appears in · 75 marks in total

Usual form

Short answer

61% of this chapter's 62 questions

Needs a diagram

60%

37 questions carry a figure — practise drawing them

Question-type distribution

Short answer38
Reasoning6
Diagram6
MCQ5
Identification5
Fill in the blank1
True/False1

Most frequent topics

Magnetic effect of current / electromagnetic induction 32Force on a current-carrying conductor 2Fleming's left-hand rule 2Heat and calorimetry 1Magnetic field and current 1Polarity of a current-carrying coil 1Iron core and magnetic field 1Reversing polarity 1

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Showing 25 of 62 matching questions (75 marks).

25 questions

9(iii)

The diagram below shows a cardboard on which iron filings are kept. A wire bent in the form of a loop is seen passing through the cardboard. When current flows through it the iron filings arrange themselves as shown below.

9(iii)(a)2023

Short answerEasy1 mark

State the polarities of the battery at A and B.

9(iii)(b)2023

Short answerEasy1 mark

State the effect on the magnetic field if an iron rod is held along the axis of the coil.

9(iii)(c)(1)2023

ReasoningModerate1 mark

State one way to: Change the polarity of the coil.

9(iii)(c)(2)2023

ReasoningModerate1 mark

State one way to: Decrease the strength of the magnetic field around the coil.

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)

1(v)2022

MCQEasy1 mark

A conductor AB is kept along north south direction of the earth above a magnetic needle as shown below. When the key K is closed then: (a) the needle will not show any deflection. (b) the needle will deflect towards east. (c) the needle will turn in the opposite direction i.e. towards south. (d) the needle will deflect towards west.

1(vi)2022

MCQEasy1 mark

A coil wound around a piece of soft iron can become an electromagnet only when: (a) the circuit is open. (b) a magnetic compass is present in the vicinity. (c) a galvanometer is connected to the circuit. (d) a current flows in the circuit.

2(i)

The diagram below shows a magnetic compass kept closer to a coil AB wound around a hollow cylindrical cardboard :

2(i)(a)2022

Short answerEasy1 mark

After studying the circuit and the magnetic compass carefully, state whether the switch S1 is open or closed.

2(i)(b)2022

Short answerEasy1 mark

How did you arrive at the conclusion in (a)?

Short answerEasy1 mark

What is the purpose of placing the magnetic compass in the above setup?

4(ii)(a)2022

Short answerEasy2 marks

Name two factors on which the force experienced by a conductor carrying current, placed in a magnetic field, depends. Also, state how these factors affect the force.

4(ii)(b)2022

Short answerEasy1 mark

With the help of which rule you can determine the direction of force acting on a current carrying conductor placed in a magnetic field?

4(c)

When a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. What should be the angle between the magnetic field and the length of the conductor so that the force experienced is :

4(c)(i)2020

Short answerEasy1 mark

Zero

4(c)(ii)2020

Short answerEasy1 mark

Maximum?

4(e)

The diagram below shows a loop of wire carrying current I :