Physics
Grade-10
Easy
Question
An induced emf is induced in the circuit whenever the magnetic flux is related to a coil change:
I. for short, the e.m.f. lasts
II. for an extended period of time
III. for as long as the flux is changing
The correct statement(s) is/are
- II and III
- III only
- I and III
- I and II
Hint:
As long as the magnetic flux is changing in relation to the coil, the emf is induced.
The correct answer is: III only
An induced emf is induced in the circuit whenever the magnetic flux is related to a coil change for as long as the flux is changing.
- An emf is induced when there is a relative motion in the circle.
- The magnetic flux is related to the coil to create relative motion.
- Whenever there is a change in magnetic flux, the emf induces.
- Thus, the correct statement is III only.
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Choose the correct option from the following statements.
Assertion: The movement of a conductor in a magnetic field can induce an emf.
Reason: A change of the magnetic field might cause an emf.
Choose the correct option from the following statements.
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Reason: A change of the magnetic field might cause an emf.
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Consider a coil and a magnet.
Current is induced in the coil when:
I. coil and magnet both are at rest.
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III. magnet is at rest and coil moves along x.
IV. both coil and magnet move along y with the same speed.
The correct statements are:
Consider a coil and a magnet.
Current is induced in the coil when:
I. coil and magnet both are at rest.
II. the coil is at rest and the magnet moves along x.
III. magnet is at rest and coil moves along x.
IV. both coil and magnet move along y with the same speed.
The correct statements are:
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