Questions from College Physics

Q: The battery terminal voltage in Figure P20.43 is ε =

The battery terminal voltage in Figure P20.43 is ε = 9.00 V and the current I reaches half its maximum value of 2.00 A at t = 0.100 s after the switch is closed. Calculate (a) The time co...

Q: A 25-mH inductor, an 8.0-Ω

A 25-mH inductor, an 8.0-Ω resistor, and a 6.0-V battery are connected in series as in Figure P20.43. The switch is closed at t = 0. Find the voltage drop across the resistor (a) At t = 0...

Q: Calculate the resistance in an RL circuit in which L = 2

Calculate the resistance in an RL circuit in which L = 2.50 H and the current increases to 90.0% of its final value in 3.00 s.

Q: Consider the circuit shown in Figure P20.43. Take ε

Consider the circuit shown in Figure P20.43. Take ε = 6.00 V, L = 8.00 mH, and R = 4.00 Ω. (a) What is the inductive time constant of the circuit? (b) Calculate the current in...

Q: (a) If an inductor carrying a 1.70-

(a) If an inductor carrying a 1.70-A current stores an energy of 0.300 mJ, what is its inductance? (b) How much energy does the same inductor store if it carries a 3.00-A current?

Q: Receiving radio antennas can be in the form of conducting lines or

Receiving radio antennas can be in the form of conducting lines or loops. What should the orientation of each of these antennas be relative to a broadcasting antenna that is vertical?

Q: A 300-turn solenoid has a radius of 5.00

A 300-turn solenoid has a radius of 5.00 cm and a length of 20.0 cm. Find (a) The inductance of the solenoid and (b) The energy stored in the solenoid when the current in its windings is 0.500 A.

Q: A 24-V battery is connected in series with a resistor

A 24-V battery is connected in series with a resistor and an inductor, with R = 8.0 Ω and L = 4.0 H, respectively. Find the energy stored in the inductor (a) When the current reaches its maximum value...

Q: A 60.0-m length of insulated copper wire is

A 60.0-m length of insulated copper wire is wound to form a solenoid of radius 2.0 cm. The copper wire has a radius of 0.50 mm. (a) What is the resistance of the wire? (b) Treating each turn of the so...

Q: Two circular loops of wire surround an insulating rod as in Figure

Two circular loops of wire surround an insulating rod as in Figure P20.53. Loop 1 carries a current I in the clockwise direction when viewed from the left end. If loop 1 moves toward loop 2, which rem...