A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate {dB^{\to}}/{dt}. Loop 1 of radius R > r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then the e.m.f. generated is : [NEET 2016 P2]

Correct Answer is : −d→Bdtπr2 in loop 1 and zero in loop 2

-{dB^{\to}}/{dt}\pir^2 in loop 1 and zero in loop 2

zero in loop 1 and zero in loop 2

-{dB^{\to}}/{dt}\pir^2 in loop 1 and -{dB^{\to}}/{dt}\pir^2 in loop 2

-{dB^{\to}}/{dt}\piR^2 in loop 1 and zero in loop 2

Class 12 NEET Physics Electromagnetic Induction and Alternating Currents

Question : 45 of 116

Marks: +1, -0

A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate

→

. Loop 1 of radius R > r encloses the region r and loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then the e.m.f. generated is :

[NEET 2016 P2]

−
d
→
B
dt
πr2 in loop 1 and zero in loop 2
zero in loop 1 and zero in loop 2
−
d
→
B
dt
πr2 in loop 1 and −
d
→
B
dt
πr2 in loop 2
−
d
→
B
dt
πR2 in loop 1 and zero in loop 2

Validate

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