Capicators

The working voltage of a capacitor in an ac circuit should be

• A- equal to the highest applied voltage.

• B- at least 20 percent greater than the highest applied voltage.

• C- at least 50 percent greater than the highest applied voltage.

(Refer to Figure 1.) When different rated capacitors are connected in series in a circuit, the total capacitance is

• less than the capacitance of the lowest rated capacitor.

• greater than the capacitance of the highest rated capacitor.

• equal to the sum of all the capacitances.

Capacitors are sometimes used in dc circuits to

• counteract inductive reactance at specific locations.

• smooth out slight pulsations in current/voltage.

• assist in stepping voltage and current up and/or down.

The amount of electricity a capacitor can store is directly proportional to the

• distance between the plates and inversely proportional to the plate area.

• plate area and is not affected by the distance between the plates.

• plate area and inversely proportional to the distance between the plates.

(Refer to Figure 2.) What is the total capacitance of a circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?

• 0.170 uF.

• 0.125 pF.

• 0.0125 uF.

When different rated capacitors are connected in parallel in a circuit, the total capacitance is

(Note: C(T) = C(1) + C(2) + C(3) . . .)

• less than the capacitance of the lowest rated capacitor.

• equal to the capacitance of the highest rated capacitor.

• equal to the sum of all the capacitances.

What is the total capacitance of a certain circuit containing three capacitors with capacitances of .25 microfarad, .03 microfarad, and .12 microfarad, respectively?

(Note: C(T) = C(1) + C(2) + C(3))

• 0.4 uF.

• 0.04 pF.

• 0.04 uF.

(Refer to Figure 2.) What is the total capacitance of a circuit containing three capacitors in parallel with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?

• 0.170 uF.

• 0.125 pF.

• 0.0125 uF.

Convert farads to microfarads by

• multiplying farads by 10 to the power of 6

• multiplying picofarads by 10 to the power of 6

• multiplying microfarads by 10 to the power of 6

Convert farads to picofarads by:

• multiplying farads by 10 to the power of 12.

• multiplying microfarads by 10 to the power of -12.

• multiplying picofarads by 10 to the power of 12.