Magnetic Effects Of Current Question 360
Question: An electric field of 1500 V / m and a magnetic field of 0.40 weber / meter2 act on a moving electron. The minimum uniform speed along a straight line the electron could have is [KCET 2005]
Options:
A) 1.6 ´ 1015 m / s
B) 6 ´ 10-16 m / s
C) 3.75 ´ 103 m / s
D) 3.75 ´ 102 m / s
Show Answer
Answer:
Correct Answer: C
Solution:
When electron moves in both electric and magnetic field then $ qE=qvB $ . \ $ v=\frac{E}{B}=\frac{1500}{0.40}=3750m/s $ $ =3.75\times 10^{3}m/s $ .
BETA
