Home
Class 12
PHYSICS
A: When a conducting loop is kept statio...

A: When a conducting loop is kept stationary in a non-uniform magnetic field an emf is induced.
R: As per Faraday's law, whenever flux changes, an emf is induced.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion.

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.

C

If Assertion is true statement but Reason is false.

D

If Assertion is false statement and Reason is true.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given problem, we need to analyze the two statements: Assertion (A) and Reason (R). ### Step-by-Step Solution: 1. **Understanding Assertion (A)**: - The assertion states that "When a conducting loop is kept stationary in a non-uniform magnetic field, an emf is induced." - A conducting loop in a non-uniform magnetic field does not necessarily induce an emf if it is stationary. For an emf to be induced, there must be a change in magnetic flux through the loop. Since the loop is stationary, there is no movement to change the flux, even if the magnetic field is non-uniform. Therefore, **Assertion (A) is false**. 2. **Understanding Reason (R)**: - The reason states that "As per Faraday's law, whenever flux changes, an emf is induced." - Faraday's law of electromagnetic induction states that an emf is induced in a circuit when there is a change in magnetic flux through the circuit. This statement is true because it correctly describes the principle of electromagnetic induction. Therefore, **Reason (R) is true**. 3. **Conclusion**: - Since Assertion (A) is false and Reason (R) is true, we can conclude that the correct answer is that A is false and R is true. ### Final Answer: - The correct option is: A is false and R is true.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    AAKASH INSTITUTE|Exercise ASSIGNMENT(SECTION -C) Previous Years Questions|23 Videos

  • ELECTRIC CHARGES AND FIELDS

    AAKASH INSTITUTE|Exercise SECTION -J(Aakash Challengers Questions)|5 Videos

  • ELECTROMAGNETIC WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT SECTION - D Assertion-Reason Type Questions|25 Videos

Similar Questions

Explore conceptually related problems

A coil of metal wire is kept stationary in a non-uniform magnetic field. An e.m.f. Is induced in the coil.

A metallic loop is placed in a nonuiform magnetic field. Will an emf be induced in the loop?

A metallic loop is placed in a non-uniform steady magnetic field. Will an emf be induced in the loop?

An emf induced in a coil rotating in a uniform magnetic field is given by

State whether the following statement are true of false giving reason in brif : (a) The dimension of (h//e) is the same as that of magnetic flux phi . (b) The dimensions of electric and magnetic flux are same. (c ) A coil or a metal wire is kept stationary in a non-uniform magnetic field. An e.m.f. is induced in the coil. (d) An e.m.f. can be induced between the two ends of a straingth copper wire when it is moved through a magnetic field.

Asseration: The induced emf in a conducting loop of wire will be non zero when it rotates in a uniform magnetic field. Reason: The emf is induced due to change in magnetic flux.

Consider a conducting circular loop placed in a magentic filed as shown. When magnetic field changes with time, magentic flux also changes and emf is induced. e=-(dphi)/(dt) If resistance of loop is R then induced current. i=e/R For Current, charge must have come into motion. Magnetic force cannot make the statinoary charges to move. Actually there is an induced electric field in the conductor caused by changing magnetic flux, which make the change to move intvec(E).dvec(l)=e=-(dphi)/(dt) This induced electric field is non-electrostatic by nature. line integral of vec(E) around a closed path is non-zero A square non- conducting loop 20 cm on a side is placed in a magnetic field The centre of side AB coincides with the centre of magnetic field The magnetic field is increasing at the rate of 2T/s. Find the magnitude of line integral of induced electric field along path BC.

Consider a conducting circular loop placed in a magentic filed as shown. When magnetic field changes with time, magentic flux also changes and emf is induced. e=-(dphi)/(dt) If resistance of loop is R then induced current. i=e/R For Current, charge must have come into motion. Magnetic force cannot make the statinoary charges to move. Actually there is an induced electric field in the conductor caused by changing magnetic flux, which make the change to move intvec(E).dvec(l)=e=-(dphi)/(dt) This induced electric field is non-electrostatic by nature. line integral of vec(E) around a closed path is non-zero The magnetic field within cylindrical region whose cross - section is indicated starts increasing at a constant rate alpha tesla/sec The graph showing the variation.of induced electric field with distance r from the axis of cylinder is :