Electro Magnetism Class 10 ICSE Physics MCQ Questions
Looking for Electro Magnetism Class 10 ICSE Physics Chapter 10 MCQ Questions? If yes, You are the right page. Here we have provided ICSE class 10 physics chapter 10 multiple choice questions and answers. All MCQ are important.
1) If current in wire is increased, the deflection of the needle
a) decrease. b) increase c)zero d) None of these
Ans-option (b)
2) At neutral point the resultant magnetic field is
a) one b) decrease
c) zero d) increase
Ans-option (c)
3) If the current at the face of loop is clockwise so it behave as
a) south pole
b) north pole
c) Both (a)& (b)
d) None of these Ans-option (a)
4) A magnetic field discovered by
a) Bohr b) faraday c)Ampere .d)oersted
Ans-option(d)
5)The magnetic field inside the solenoid is
a) non-uniform
b) uniform
c) circular
d) parabolic
Ans-option (b)
6) Current carrying solenoid behaves like a
a) Bar magnet
b) cylinder magnet
c) ring magnet
d)horseshoe magnet
Ans- option (a)
7)If a soft iron rod is placed along the axis of solenoid the magnetic field will
a) decrease b) increase c) constant. d)zero
Ans-option (b)
8) The magnetic field of electromagnet can be increase by
a) increasing the number of turns in solenoid
b) increasing the current through the solenoid
c) decreasing the current through the solenoid
d) Both (a) & (b) Ans-Option (d)
9) The direction of current through wire is reversed then the direction of force is
a) increase b) decrease c)reversed d) straight Ans -option (c)
10) The incorrect statement about magnitude of force
a) directly proportional to current
b) inversely proportion to length of of wire
c) directly proportional to strength of magnetic field
d) directly proportional to length of wire
Ans-option (b)
11) In fleming’s left hand rule the forefinger indicates
a) direction of current
b) direction of motion
c) direction of magnetic field
d) direction of force
Ans-option (c)
12) An electric motor is a device which convert
a)electrical energy into mechanical energy
b) electrical energy into light energy
c) mechanical energy to electrical energy
d) electrical energy into sound energy
Ans-Option (a)
13) The deflecting couple is minimum when
a)plane of coil is parallel to magnetic field
b) plane of coil is perpendicular to magnetic field
c) magnetic field is normal to plane of coil
d) None of those
Ans -option (b)
14) the magnet is moved away from solenoid, the galvanometer shows a deflection
a) toward left
b) toward right
c) zero
d)None of these
Ans-option (a)
15) Lenz’s law gives
a) magnitude of induced current
b) magnitude of induced e.m.f
c) direction of induced e⋅f
d) Both (a) & (b)
Ans-option (c)
16) The induced e.m.f become zero when magnetic flux linked with coil is
a) maximum
b) minimum
c) Zero .
d) normal
Ans- option (a)
17) The Transformer is used in
a)D.C circuit
b) A.C circuit
c) Both (a) & (b)
d) None of these
Ans-option (b)
18) A current of constant magnitude and unique direction is called
a) Transformer
b) Alternating current
c) Direct current
d) Ampere
Ans-Option (c)
19) The transformer used to change a high alternating voltage to a low alternating voltage is called
a) step down transformer
b) sep up transformer
c)Both (a) & (b)
d) None of these Ans-option (a)
20) In step-up transformer.
a) Es < Ep
b) Es = Ep.
c) Es > Ep
d) None of these
Ans-option (c)
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