A solenoid of length 10 cm and radius 1 cm contains 200 turns and carries a current of 10 A. The value of pole strength of each pole is

Question

A solenoid of length 10 cm and radius 1 cm contains 200 turns and carries a current of 10 A. The value of pole strength of each pole is (A) 2 Am (B) 2 π Am (C) 4 π Am (D) 10 π Am

Tardigrade Admin · Accepted Answer

NIA = mL ∴ m = NIA / L =200 × π(10-2)2 × 10 / 0.1=2 π

Q. A solenoid of length $10 c m$ and radius $1 c m$ contains $200$ turns and carries a current of $10 A$ . The value of pole strength of each pole is

$2 A m$

$2 π A m$

$4 π A m$

$10 π A m$

$N I A = m L$
$∴ m = N I A / L = 200 \times π (1 0^{- 2})^{2} \times 10/0.1 = 2 π$

Q. A solenoid of length 10cm and radius 1cm contains 200 turns and carries a current of 10A. The value of pole strength of each pole is

2Am

2πAm

4πAm

10πAm