DC Parallel Circuits (Part 1)

In a parallel circuit the supply current is equal to the?

• a. total power multiplied by the supply voltage

• b. sum of the branch currents

• c. supply voltage divided by the resistance of any one branch

• d. ratio of the branch currents

Connecting resistors in parallel produces the same general effect as ?

• a. increasing the temperature of a metallic conductor

• b. increasing the cross-sectional area of a conductor

• c. increasing the length of a conductor

• d. decreasing the conductance of a conductor.

When three 10Ω resistors are connected in parallel,

the voltage drop across each is ?

• a. one third of the supply voltage

• b. supply voltage divided by 10 .

• c. equal to the supply voltage

• d. supply voltage divided by 30.

The lowest value of resistance in any parallel combination of resistors is always ?

• a. equal to the equivalent resistance of the combination.

• b. less than the equivalent resistance of the combination.

• c. dependent on voltage and current for its resistance.

• d. greater than the equivalent resistance of the combination.

Twenty five resistors each with a resistance of 100 Ω are connected in parallel with each other. The equivalent resistance of the combination is ?

• 100 Ohms

• 2500 Ohms

• 4 Ohms

• 25 Ohms

A parallel circuit is defined as a circuit with ?

• a. more than one resistor

• b. more than one current path

• c. only one current path

• d. more than one supply voltage

If an extra parallel connected resistor is added to a circuit, the equivalent resistance of the circuit will ?

• remain the same

• decrease

• increase

• cause the voltage to change

The voltage in a parallel circuit ?

• a. is the same in all parts of the circuit

• b. decreases through the circuit from resistor to resistor

• c. greater than the supply voltage

• d. increases with increase resistance.

If one resistor in a parallel circuit of three resistors becomes short circuited,

the circuit current will ?

• a. remain constant

• b. decrease to zero

• c. decrease by the value of current in the shorted branch

• d. increase to a large value

The power dissipation of a parallel circuit is equal to the ?

• a. sum of the power dissipation of each branch

• b. product of the power dissipation of each branch

• of each branch c. difference of the power dissipation of each branch

• d. power dissipation of each branch divided by the number of branches