A closely wound solenoid of 3000 turns and area of cross section 2 × 10-4 m2, carrying a current of 6 A is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid is

Question

A closely wound solenoid of 3000 turns and area of cross section 2 × 10-4 m2, carrying a current of 6 A is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid is (A) 1.2 J T-1 (B) 2.4 J T-1 (C) 3.0 J T-1 (D) 3.6 J T-1

Tardigrade Admin · Accepted Answer

Here, N = 3000, A = 2 × 10-4 m2, I = 6 A ∴ M = N I A = 3000 × 6 × 2 × 10-4 = 3.6 J T-1

Q. A closely wound solenoid of $3000$ turns and area of cross section $2 \times 1 0^{- 4} m^{2}$ , carrying a current of $6 A$ is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid is

$1.2 J T^{- 1}$

$2.4 J T^{- 1}$

$3.0 J T^{- 1}$

$3.6 J T^{- 1}$

Here, $N = 3000$ ,
$A = 2 \times 1 0^{- 4} m^{2}$ ,
$I = 6 A$
$∴ M = N I A = 3000 \times 6 \times 2 \times 1 0^{- 4} = 3.6 J T^{- 1}$

Q. A closely wound solenoid of 3000 turns and area of cross section 2×10−4m2, carrying a current of 6A is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid is

1.2JT−1

2.4JT−1

3.0JT−1

3.6JT−1