Magnetic Effects Of Current Question 252
Question: Three long, straight and parallel wires are arranged as shown in figure. The force experienced by 10 cm length of wire Q is
Options:
A) $ 1.4\times {{10}^{-4}}N $ towards the right
B) $ 1.4\times {{10}^{-4}}N $ towards the left
C) $ 2.6\times {{10}^{-4}}N $ towards the right
D) $ 2.6\times {{10}^{-4}}N $ towards the left
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ F=\frac{4\pi \times {{10}^{-7}}\times 20\times 10\times 10\times {{10}^{-2}}}{2\pi \times 2\times {{10}^{-2}}} $ $ -\frac{4\pi \times {{10}^{-7}}\times 10\times 30\times 10\times {{10}^{-2}}}{2\pi \times 10\times {{10}^{-2}}} $ $ =1.4\times {{10}^{-4}}N $ towards right.
BETA
