General Basic Electricity

(8009) (Refer to Figure 2) What is the total capacitance of a certain circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?

.0125 uF.

(8009-1) What is the total capacitance of a circuit containing three capacitors in parallel with capacitance of .02 microfarad, .05 microfarad, and .10 microfarad, respectively?

.170 uF

(8014) What is the total capacitamce of a certain circuit containing three capacitors with capacitance of .25 microfarad, .03 microfarad? and .12 microfarad, respectively?

.4 uF

(8007) In AC circuit, the effective voltage is

less than the maximum instantaneous voltage

(8005) An increase in which of the following factor will cause an increase in the inductive reactance of circuit?

Inductance and frequency

(8002-1) What is the opposition to the flow of AC produced by an electromagnetic field (EMF) with generated back voltage called?

Inductive reactance

(8015) Which requires the most electrical power during operation?

Two lights requiring 3 amperes each in 24- volt paralle system

(8004-1) What factors strengthen a coil inductor?

adding coils close together

(8001) The working voltage of a capacitor in an Ac Circuit should be

at least 50 percent greater than the highest applied voltage

(8002-2) Electrostatic field are also known as

dielectric fields

(8010) Unless otherwise specified, any value given for current or voltage in an AC circuit are assumed to be

effective values

(8011) When different rated capacitors are connected in parallel in a circuit, the total capacitance is

equal to the sum of all the capacitances

(8012) When inductors are connected in series in a circuit, the total inductance ( where the magnetic field of each inductor do not affect the others) is

equal to the sum of the individual inductances

(8002) The term that describes the combined resistive force in an AC circuit is

impedance

(8003) The basis for transformer operation in the used of alternating current is mutual

inductance

(8004) The opposition offered by a coil to the flow of alternating current (ignoring resistance) is called

inductive reactance

(8006) (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

(8013) (Refer to Figure 3) When more than two inductors of different inductance are connected in parallel in a circuit, the total inductance is

less than the inductance of the lowest rated inductor

(8009-3) Convert farads to picofarads by:

multiplying farads by 10 to the power of 12

(8009-2) Convert farads to microfarads by

multiplying farads by 10 to the power of 6

(8008) The amount of electricity a capacitor can store is directly proportional to the

plate area and inversely proportional to the distance between the plates

(8006-1) Capacitors are sometimes used in DC circuits to

smooth out slight pulsations in current/voltage