Alternating Current

Question 1

AC current

Answer 1

Current that fluctuates sinusoidally with time at a fixed frequency

Question 2

AC

Answer 2

Alternating current ia a type of current that is not steady and it continuously changes from positive and negative. In order to stabilise the current , capacitance, inductance and resistance is used.

Question 3

Capacitive reactance

Answer 3

Opposition of a capacitor to a change in current.

Question 4

Direct current

Answer 4

Flow of electric charge only in one direction

Question 5

Impedance

Answer 5

The total joint opposition to the flow of current in the reactance (resistance, inductance, capacitance) in an AC circuit.

Question 6

Conductance (G)

Answer 6

Is the reciprocal of resistance. Is defined as the ease at which a resistor allows current to flow when a voltage either AC or DC is applied.

Question 7

Admittance (Y)

Answer 7

Is the reciprocal of impedance(Z)
Is defined as the ease at which a circuit composed of resistances and reactances allows current to flow when a voltage is applied taking into account the phase difference between voltage and the current.

Question 8

Susceptance(B)

Answer 8

Is the reciprocal of pure reactance.
This is defined as thebease at which a reactance allow a AC to flow when a voltage of a given frequency is applied.

Question 9

Current will be maximum when

Answer 9

XL= XC

Question 10

The resistance of an inductor to current in a circuit is known as

Answer 10

Inductive reactance.

Question 11

The average power consumed by a capacitor/ inductor in an AC circuit is

Answer 11

Zero

Question 12

Use of capacitors

Answer 12

Capacitors is a device that stores electrical energy in a electric field.
They are used for blocking DC while allowing alternating current pass.