Questions from College Physics

Q: The magnetic field shown in Figure P20.63 has a uniform

The magnetic field shown in Figure P20.63 has a uniform magnitude of 25.0 mT directed into the paper. The initial diameter of the kink is 2.00 cm. (a) The wire is quickly pulled taut, and the kink shr...

Q: An aluminum ring of radius 5.00 cm and resistance 3

An aluminum ring of radius 5.00 cm and resistance 3.00 x 10-4 Ω is placed around the top of a long air-core solenoid with 1000 turns per meter and a smaller radius of 3.00 cm, as in Figure...

Q: In Figure P20.65 the rolling axle of length 1.

In Figure P20.65 the rolling axle of length 1.50 m is pushed along horizontal rails at a constant speed v = 3.00 m/s. A resistor R = 0.400 Ω is connected to the rails at points a and b, di...

Q: An N-turn square coil with side ℓ and resistance R

An N-turn square coil with side â„“ and resistance R is pulled to the right at constant speed v in the positive x - direction in the presence of a uniform magnetic field B acting perpe...

Q: A conducting rectangular loop of mass M, resistance R, and

A conducting rectangular loop of mass M, resistance R, and dimensions w by â„“ falls from rest into a magnetic field B(, as shown in Figure P20.67. During the time interval before the...

Q: (a) What is the resistance of a light-bulb

(a) What is the resistance of a light-bulb that uses an average power of 75.0 W when connected to a 60.0 - Hz power source having a maximum voltage of 170. V? (b) What is the resistance of a 100. - W...

Q: An AC generator with an output rms voltage of 36.0

An AC generator with an output rms voltage of 36.0 V at a frequency of 60.0 Hz is connected across a 12.0 - μF capacitor. Find the (a) Capacitive reactance, (b) Rms current, and (c) Maximum current in...

Q: When light (or other electromagnetic radiation) travels across a given

When light (or other electromagnetic radiation) travels across a given region, (a) What is it that oscillates? (b) What is it that is transported?

Q: What maximum current is delivered by an AC source with ΔVmax =

What maximum current is delivered by an AC source with ΔVmax = 48.0 V and f = 90.0 Hz when connected across a 3.70 - μF capacitor?

Q: A generator delivers an AC voltage of the form Δv = (

A generator delivers an AC voltage of the form Δv = (98.0 V) sin (80πt) to a capacitor. The maximum current in the circuit is 0.500 A. Find the (a) Rms voltage of the generator, (b) Frequency of the g...