Question

1. In an AC series circuit, the current in a pure resistor differs in phase with the applied voltage by what angle?

Options: a=zero, b=45°, c=90° d=180

2. In the inductor of a 60-Hz AC series circuit, the peak voltage precedes the peak current in each cycle by what time interval?

Option: a)2.1 ´ 10^-3 s b)4.2 ´ 10^-3 s c) 8.3 ´ 10^-3 s d) 1.7 ´ 10^-3 s

3) What is the impedance of an AC series circuit that is constructed of a 10.0-W resistor along with 12.0 W inductive reactance and 7.0 Wcapacitive reactance?

4) An AC series circuit contains a resistor of 20 W, a capacitor of 0.75 mF and an inductor of 120 mH. What frequency should be used to create a resonance condition in the circuit?

5) When an RLC series circuit is in resonance, its impedance is:

zero. b)equal to its resistance. c)a maximum. d) pi/2 ohms

6) An electromagnetic wave with a peak magnetic field component of 1.5 ´ 10^-7 T carries what average power per unit area? (m₀ = 4pi 10^-7 T×m/A, e₀ = 8.85*10^-12C²/N×m² and c = 3.00 ´ 10⁸ m/s)

Answer 1