MHT CET202310 May 2023Evening ShiftPhysicsMagnetic Effects of CurrentActual
Two wires 2 ~mm apart supply current to a 100 ~V , 1 ~kW heater. The force per metre between the wires is ( ₀=4 10⁻²⁷ . SI unit)
Options
- A2 10⁻² ~N
- B4 10⁻³ ~N
- C2 10^2 ~N
- D10⁻² ~N
Correct answer
D. 10⁻² ~N
Step-by-step solution
Given: P=1 ~W =1000 ~W , ~V =100 ~V I =10 ~A .( P = VI ) F = ₀ I ₁ I ₂ 2 a = 4 10⁻⁷ 100 2 (2 10⁻³ ) =10⁻⁷ 10^5=10⁻² ~N