## Quiz sheet for parallel circuits

In a parallel circuit of resistors, the supply current equals the:

A) total power divided by the total resistance

B) sum of the branch currents

C) current in the largest resistance

D) total resistance divided by the voltage

ANSWER: B

In a parallel circuit the supply current equals the:

A) total power divided by the total resistance.

B) sum of the resistances divided by the voltage

C) current in each branch

D) sum of the individual branch currents

ANSWER: D

Resistors A and B are connected in parallel. Resistor A has half the resistance of resistor B. The current flowing through resistor B is:

A) one half of the supply current

B) twice as much as the current flowing in resistor A

C) two thirds of the supply current

D) one third of the supply current

ANSWER: D

In a parallel circuit, the supply current equals the:

A) total power divided by the total resistance

B) sum of the branch currents

C) current in each component

D) total resistance divided by the voltage

ANSWER: B

If there is an open circuit in a component in a parallel circuit the total current taken by the circuit will:

A) increase

B) decrease

C) remain the same.

D) double

ANSWER: B

Kirchhoffâ€™s current law states that:

A) the algebraic sum of all currents in a circuit is equal to zero.

B) the algebraic sum of all currents in any one direction equals the currents in the other direction

C) the current leaving a battery is dependent on the size of the battery.

D) the algebraic sum of currents entering or leaving a node at any instant is zero.

ANSWER: D

A conductor has a resistance of 1 ohm. If another identical conductor was connected in parallel, the circuit would have a resistance of:

A) 0.5 ohm

B) 1 ohm

C) 2 ohms

D) 4 ohms

ANSWER: A

Power in a direct current (d.c.) circuit may be calculated by combining the readings from two separate instruments. These instruments are the

A) voltmeter and wattmeter

B) ammeter and ohmmeter

C) voltmeter and ammeter

D) ohmmeter and wattmeter

ANSWER: C