Magnetic Effects Of Current Question 356
Question: A electron (q = 1.6 ´ 10?19 C) is moving at right angle to the uniform magnetic field 3.534 ´ 10?5 T. The time taken by the electron to complete a circular orbit is [MH CET 2004]
Options:
A) 2 ms
B) 4 ms
C) 3 ms
D) 1 ms
Show Answer
Answer:
Correct Answer: D
Solution:
$ T=\frac{2\pi m}{qB}=\frac{2\times 3.14\times 9.1\times {{10}^{-31}}}{1.6\times {{10}^{-19}}\times 3.534\times {{10}^{-5}}} $ $ =1\times {{10}^{-6}}sec=1\mu sec. $
BETA
