Electro Magnetic Induction And Alternating Currents Question 395
Question: A coil having n turns and resistance R W is connected with a galvanometer of resistance $ 4R\Omega $ . This combination is moved in time t seconds from a magnetic field W1 weber to W2 weber. The induced current in the circuit is [AIEEE 2004]
Options:
A) $ -\frac{W_{2}-W_{1}}{5\ Rnt} $
B) $ -\frac{n(W_{2}-W_{1})}{5\ Rt} $
C) $ -\frac{(W_{2}-W_{1})}{Rnt} $
D) $ -\frac{n(W_{2}-W_{1})}{Rt} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ i=\frac{e}{R}=\frac{-N}{R}\frac{({\varphi_{2}}-{\varphi_{1}})}{\Delta t}=\frac{-n(W_{2}-W_{1})}{5Rt} $
