Question Pool Magnetic Effects of Electric Current

# Magnetic Effects of Electric Current - SAMAGRA Question Pool & Answers | Class 10 English Medium

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 10 English Medium Physics Magnetic Effects of Electric Current

Qn 1.

Picture of an electric motor is given

a. After observing the figure write down the parts represented by N,S,R1,R2,B1,B2,ABCD

b. If current is flown as shown in diagram, what will be the direction of rotation of armature?

c. What is the function of split ring commutator in electric motors ?

a. N-S Field magnet.

R1,R2 split rings

B1,B2 brushes

ABCD armature

b. anticlockwise

c. To maintain rotation of armature the

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Qn 2.

From the given list identify the correct statements related to Fleming's left hand rule

a) Thumb indicates the direction of force

b) Forefinger indicates direction of current

c) Centre finger indicates direction magnetic field

d) other fingers that hold the conductor shows the direction of magnetic field

Thumb indicates the direction of force

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Qn 3.

A conductor is hung freely in between the poles of a 'U' shaped magnet as shown in figure. Observe it and answer the following questions.

1. What happens to the conductor when electric current is passed through it?
2. Explain the reason behind this.
3. Which law helps you to explain this ?
1. Conductor moves
2. A conductor kept in a magnetic field experience a force when electric current is passed through

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Qn 4.

Observe the diagram and answer the following questions

1. If the end A of the solenoid is wound in anticlockwise direction, which pole will be generated at that end?
2. After reversing the current through solenoid,if south pole of a bar magnet is brought near A , will it attract ? Explain

1. North pole
2. Repels. When current is reverses the end A  becomes North

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