Electro Magnetic Induction And Alternating Currents Question 350

Question: A conducting ring of radius 1 meter is placed in an uniform magnetic field B of 0.01Telsa oscillating with frequency 100Hz with its plane at right angles to B. What will be the induced electric field [AIIMS 2005]

Options:

A) π,volt/m

B) 2,volt/m

C) 10,volt/m

D) 62,volt/m

Show Answer

Answer:

Correct Answer: B

Solution:

In a constant magnetic field conducting ring oscillates with a frequency of 100 Hz. i.e. T=1100s, in time T2 flux links with coil changes from BA to zero.

Þ Induced emf = change in fluxtime =BAT/2=2BAT =2B×πr2T =2×0.01×π×121/100=4πV Induced electric field along the circle, using Maxwell equation E.dl=dφdt =AdBdt=e

Þ E=12πr×(πr2×dBdt)=e2πr=4π2πr=2,V/m



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक