Electro Magnetic Induction And Alternating Currents Question 443
Question: A rod of length 20 cm is rotating with angular speed of 100 rps in a magnetic field of strength 0.5 T about it’s one end. What is the potential difference between two ends of the rod [Orissa PMT 2004]
Options:
A) 2.28 V
B) 4.28 V
C) 6.28 V
D) 2.5 V
Show Answer
Answer:
Correct Answer: C
Solution:
$ e=\frac{1}{2}Bl^{2}\omega =Bl^{2}\pi \nu $
$ \Rightarrow e=0.5{{(20\times {{10}^{-2}})}^{2}}\times 3.14\times 100=6.28\ V $
