ExamBro
ExamBro
CUET · PHYSICS · PYQ PAPER 2023

Two long and parallel straight conducting wires carrying currents of 5 A and 10 A in same direction are separated by a distance of 2 cm . The force per unit length on one wire due to other is \(\left(\mu_0: 4 \pi \times 10^{-7} N A ^{-2}\right)\)

  1. A \(5 \times 10^{-4} N / m\); attractive force
  2. B \(5 \times 10^{-4} N / m\); repulsive force
  3. C \(2.5 \times 10^{-4} N / m\); attractive force
  4. D \(2.5 \times 10^{-4} N / m\); repulsive force
Verified Solution

Answer & Solution

Correct Answer

(A) \(5 \times 10^{-4} N / m\); attractive force

Step-by-step Solution

Detailed explanation

\( \frac{F}{L} = \frac{\mu_0 I_1 I_2}{2\pi d} \) \( \frac{F}{L} = \frac{(4\pi \times 10^{-7} N A^{-2}) (5 A) (10 A)}{2\pi (0.02 m)} \) \( \frac{F}{L} = 5 \times 10^{-4} N/m \); attractive force
From CUET
Explore more questions on app