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# Solution - Use Lenz’S Law to Determine the Direction of Induced Current - CBSE (Science) Class 12 - Physics

ConceptLenz’S Law and Conservation of Energy

#### Question

Use Lenz’s law to determine the direction of induced current in the situations described by Fig. 6.19:

(a) A wire of irregular shape turning into a circular shape;

(b) A circular loop being deformed into a narrow straight wire.

#### Solution

According to Lenz’s law, the direction of the induced emf is such that it tends to produce a current that opposes the change in the magnetic flux that produced it.

(a) When the shape of the wire changes, the flux piercing through the unit surface area increases. As a result, the induced current produces an opposing flux. Hence, the induced current flows along adcb.

(b) When the shape of a circular loop is deformed into a narrow straight wire, the flux piercing the surface decreases. Hence, the induced current flows along a'd'c'b'

Is there an error in this question or solution?

#### APPEARS IN

NCERT Physics Textbook for Class 12 Part 1 (with solutions)
Chapter 6: Electromagnetic Induction
Q: 2 | Page no. 230

#### Reference Material

Solution for question: Use Lenz’S Law to Determine the Direction of Induced Current concept: Lenz’S Law and Conservation of Energy. For the courses CBSE (Science), CBSE (Arts), CBSE (Commerce)
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