Uncle leo turnes an old-fashion radio that has an antenna that is made from a 3.0-cm-long solenoid with a cross-sectional area of 0.50cm^2, composed of 300 turns of fine copper wire. Calculate the inductance of the coil assuming it is air-filled

L = 1.26 μH

Explanation:

Length of the solenoid, l = 3.0 cm = 0.03 m

Cross sectional area of the solenoid, A = 0.50 cm² = 0.5 * 10⁻⁴ m²

A = 5 * 10⁻⁵ m²

N = 300 turns

The inductance of a coil is given by ...................(1)

Magnetic constant,

Substituting the appropriate values into equation (1)

answer is c

explanation:

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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