Electro Magnetic Induction And Alternating Currents Question 478
Question: A rectangular coil of 20 turns and area of cross- section 25 sq. cm has a resistance of $ 100,\Omega $ . If a magnetic field which is perpendicular to the plane of coil changes at a rate of 1000 tesla per second, the current in the coil is
Options:
A) 1 A
B) 50 A
C) 0.5 A
D) 5 A
Show Answer
Answer:
Correct Answer: C
Solution:
- $ i=\frac{e}{R}=\frac{\frac{nAdB}{dt}}{R} $ $ =\frac{20\times (25\times {{10}^{-4}})\times 1000}{100}=0.5A $
