Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction Online Test With Answers

image
image
image

Physics ECAT Pre Engineering Chapter 15 Electromagnetic Induction Online Test

Sr. # Questions Answers Choice
1 An induced current can be produced by: Constant magnetic field Changing magnetic field Varying magnetic feild Constant electric field None of these
2 An emf is set up in a conductor when it: is kept in a magnetic field is kept in a electric field Move across a magnetic field Both (A) and (B) None of these
3 The current produced by moving a loop of a wire across a magnetic field is called: Direct current Magnetic current Alternating current Induced current None of these
4 When a conductoris moved across a magnetic field: Emf induced its similar to that of a battery Emf induced gives rise to induced current An emf is induced across its ends All are correct None of these
5 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called: Induced emf Both A and B Both A and C Motion emf Electrostatic emf
6 In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called: Motion emf Both A and B Both A and C Electrostatic emf Induced emf
7 When a conductor is moved across a magnetic field, the redistribution of charge sets up: Magnetic field Electrostatic field Electromagnetic field All of these None of these
8 When a conductor moved with its length parallel to the lines of magnetic fled: An emf is induced across its ends Emf induced is similar to that of a battery Emf passes through the conductor Both A and B None of these
9 The product of induced current and the resistance of the wire through which the current is passing is called: Electromagnetic induction induced emf Induced current Self induced None of these
10 The unit of induced emf is: Volt Nm/As Joule coul<sup>-1</sup> Both A and C All of these
11 Referring to above figure, a changing current in coil P can be produced: At the instant the switch is closed At the instant the switch is opened With the help of rheostat All of these None of these
12 Referring to above figure, due to change in current in the coil P, the change in magnetic flux: Is associated with coil P Is associated with coil S Causes an induced current is coil S All of these None of these
13 Referring to above figure, current in coil P falls from its maximum value to zero: At the instant the switch is closed At the instant the switch is opened When switch is kept open When switch is kept closed None of these
14 Referring to above figure, current in the coil P grows from zero to its maximum value: At the instant the switch is closed At the instant the switch is opened When switch is kept open All of above Neither of above
15 A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when: The coil is distorted The coil is rotated The coil is neither distorted nor rotated Both A and B None of these
Download This Set
×