Problem 71.
A 5cm long solenoid has 2000 turns. Calculate its inductance. The diameter of the solenoid is 5 mm.
Solution
Problem 72.
A 100turn 10cmdiameter solenoid is placed in a 0.01 T magnetic field, which is parallel to the axis of the solenoid. The solenoid rotates in 5 seconds. Calculate the average emf generated across the solenoid.
Solution
Problem 73.
A 50 mH inductor is connected to a 20 V battery at zero moment of time. Find the current in the circuit at t=0.1 s. Neglect the resistance of the circuit and the internal resistance of the battery.
Solution
Problem 74.
A 100 mH inductor is connected to ideal 10 V battery at t=0. Find the moment of time when the current in the circuit is 0.5 A. Neglect the resistance of the circuit.
Solution
Problem 75.
What is the magnitude of a torque on a square loop shown in the figure?
Solution
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