ac 1

This equations for the:

• AC circuits only with R

• AC circuits only with L

• AC circuits only with C

This equations for the:

• AC circuits only with R

• AC circuits only with L

• AC circuits only with C

In a series circuit current must be

• constant for each element

• cosine graph in all 3 components

• different for each element

Calculate the total impedance if C=50nF and R=2000 Ohm.

• 106200 Ohm

• 5175 Ohm

• 3250 Ohm

• 21000 Ohm

The voltage output of an AC source is given by the expression ∆v = 200 sin wt, where ∆v is in volts. What is the rms current in the circuit when this source is connected to a 100 ohms resistor.

• 300 A

• 2.82 A

• 2.0 A

• 1.41 A

As the frequency of the AC voltage across a capacitor approaches zero, the capacitive reactance of that capacitor _______.

• approaches zero

• approaches infinity

• becomes negative

• does not change

The graph below represents an AC circuit that consists of a generator and an inductor. The voltage __________.

• lags the current by 45°

• lags the current by 90°

• leads the current by 45°

• leads the current by 90°

When a particular inductor is connected to a source of sinusoidal varying voltage with constant amplitude and a frequency of 60.0 Hz, the rms current is 3.0 A. What is the rms current if the source frequency is doubled?

• 1.5A

• 3.0 A

• 4.2 A

• 6.0 A

An emf of 1.0 V is induced in an inductor when the current decreases at a rate of 0.05 A/s. What is the inductance of the inductor?

• 5 H

• 10 H

• 15 H

• 20 H