Magnetic Effects Of Current Question 228
Question: Two parallel wires of length 9 m each are separated by a distance 0.15 m. If they carry equal currents in the same direction and exerts a total force of 30 ´ 10?7 N on each other, then the value of current must be [MH CET 2003]
Options:
A) 2.5 amp
B) 3.5 amp
C) 1.5 amp
D) 0.5 amp
Show Answer
Answer:
Correct Answer: D
Solution:
$ F={{10}^{-7}}\times \frac{2i^{2}}{a}\times l $
$ \Rightarrow 30\times {{10}^{-7}}={{10}^{-7}}\times \frac{2i^{2}}{0.15}\times 9 $
$ \Rightarrow i=0.5A $
BETA
