XII_Physics_Electromagnetic Induction_6 Online Test
A square coil area is placed perpendicular to a uniform magnetic field of intensity. The magnetic flux through the coil is ____.
10 weber
100 weber
A copper ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling magnet while it is passing through the ring is ____.
Equal to that due to gravity
Less than that due to gravity
More than that due to gravity
Depends on the diameter of the ring and the length of the
The direction of induced e.m.f. during electromagnetic induction is given by ____.
Faraday's law
Lenz's law
Maxwell's law
Ampere's law
A magnet is brought towards a coil (i) speedily (ii) slowly then the induced e.m.f./induced charge is respectively ____.
More in first case / More in first case
More in first case/Equal in both case
Less in first case/More in second case
Less in first case/Equal in both case
/
A coil of area has 500 turns. Magnetic field of is perpendicular to the coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is ____.
1 V
5 V
50 V
Zero
Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then, is ____.
Clockwise
Zero
Counter clockwise
In a direction that depends on the ratio of the loop radii
According to Faraday's law of electromagnetic induction ____.
The direction of induced current is such that it opposes the cause producing it
The magnitude of induced e.m.f. produced in a coil is directly proportional to the rate of change of magnetic flux
The direction of induced e.m.f. is such that it opposes the cause producing it
None of the above
The north pole of a long horizontal bar magnet is being brought closer to a vertical conducting plane along the perpendicular direction. The direction of the induced current in the conducting plane is ____.
Horizontal
Vertical
Clockwise
According to Lenz’s law
The magnetic flux linked with a vector area in a uniform magnetic field is ____.
AB
Description:
This test consist of 10 questions.Students should ideally
take 10 minutes to complete the test. This
test is useful for those students who are preparing for
IIT JEE, AIEEE or any other engineering entrance test.
This test consist of questions from Electromagnetic Induction and which,
in general, is focused in AIEEE and IIT JEE. In
this chapter,magnetic flux , faraday's law , lenz's law, eddy current inductance ,ac generator are key topic and mostly
application based questions are asked.
Discussion
There are no more comments to show right now