Test: Motional Emf


10 Questions MCQ Test Physics Class 12 | Test: Motional Emf


Description
This mock test of Test: Motional Emf for Class 12 helps you for every Class 12 entrance exam. This contains 10 Multiple Choice Questions for Class 12 Test: Motional Emf (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Motional Emf quiz give you a good mix of easy questions and tough questions. Class 12 students definitely take this Test: Motional Emf exercise for a better result in the exam. You can find other Test: Motional Emf extra questions, long questions & short questions for Class 12 on EduRev as well by searching above.
QUESTION: 1

The magnetic flux passing normally through a coil is ø = 20 cos πt + t2 + 50 + 25m Wb What will be the induced emf at t = 1s?​

Solution:
QUESTION: 2

A copper rod moves parallel to the horizontal direction. The induced emf developed across its ends due earth’s magnetic field will be maximum at the

Solution:
QUESTION: 3

The magnetic flux through a surface varies with time as follows:

= 12t2 + 7t + 3
here, is in milliweber and t is in seconds.
What will be the induced emf at t = 5s?​

Solution:
QUESTION: 4

In Faraday’s experiment if the magnet is moved towards the coil, it results in ____________ in magnetic field B at any point on the wire loop. The _________ shows deflection. Thus emf is induced by changing B.

Solution:
QUESTION: 5

What is the value of induced e.m.f if a wire is moved between the gap of two poles of a magnetin in 1 s and magnetic flux between the poles is 6 x 10-3 Wb?​

Solution:
QUESTION: 6

Two similar circular co-axial loops carry equal current in the same direction. If the loops be brought nearer, the currents in them will

Solution:
QUESTION: 7

When a wire loop is rotated in a magnetic field, the direction of induced emf changes once in each

Solution:
QUESTION: 8

The induced e.m.f in a coil is given by ε = 100sin 100π volts. Calculate the number of rotations the coil makes per second.​

Solution:
QUESTION: 9

The motional emf produced across a wire moving through a magnetic field does not depend on its:

Solution:
QUESTION: 10

If we keep two similar loops made up of copper and constantan in a magnetic field for same amount of time, in which loop the induced e.m.f will be greater.

Solution:

Related tests