Electric Circuits Power Quiz

In a series circuit, if the total resistance is 10 ohms and the current flowing through the circuit is 2 amperes, what is the total power consumed by the circuit?

• 20 watts

• 40 watts

• 10 watts

• 5 watts

What is the total voltage across a series circuit with three resistors of 2 ohms, 3 ohms, and 5 ohms, if the current flowing through the circuit is 1 ampere?

• 10 volts

• 5 volts

• 15 volts

• 20 volts

Answer explanation

RT = 2 + 3 + 5 = 10

V=IR

V= 1 (10)

V=10

In a parallel circuit, if the voltage across each branch is 12 volts, what is the power consumed by a branch with a resistance of 6 ohms?

• 24 watts

• 12 watts

• 6 watts

• 2 watts

Answer explanation

P= V^2 / R

P= 12^2 / 6

P=24

If a parallel circuit has a total current of 6 amperes and consists of three branches with equal resistance, what is the current through each branch?

• 2 amperes

• 3 amperes

• 1 ampere

• 6 amperes

Answer explanation

6/3=2

In a combination circuit, if the total power consumed is 60 watts and the total voltage is 12 volts, what is the total current flowing through the circuit?

• 5 amperes

• 10 amperes

• 15 amperes

• 20 amperes

Answer explanation

P=IV

I=P/V

I=60/12

I=5

What is the equivalent resistance of a series circuit with resistors of 4 ohms, 6 ohms, and 10 ohms?

• 20 ohms

• 10 ohms

• 4 ohms

• 6 ohms

Answer explanation

4 + 6 + 10 = 20

In a parallel circuit, if one branch has a resistance of 8 ohms and another branch has a resistance of 4 ohms, what is the total resistance of the circuit?

• 2.67 ohms

• 12 ohms

• 3 ohms

• 6 ohms

A combination circuit has a series section with a resistance of 5 ohms and a parallel section with resistances of 10 ohms and 20 ohms. What is the total resistance of the circuit?

• 10 ohms

• 11.67 ohms

• 7.5 ohms

• 35 ohms

Answer explanation

Parallel Circuit

1/ (1/10+1/20) =6.67

Series Circuit

6.67 + 5 = 11.67

If the total power consumed by a parallel circuit is 100 watts and the voltage across the circuit is 10 volts, what is the total current flowing through the circuit?

• 5 amperes

• 10 amperes

• 15 amperes

• 20 amperes

Answer explanation

P=IV

I=P/V

100/10=10

In a series circuit, if the voltage across the circuit is 24 volts and the total resistance is 12 ohms, what is the current flowing through the circuit?

• 1 ampere

• 2 amperes

• 3 amperes

• 4 amperes

Answer explanation

V=IR

I=V/R

I=24/12

I=2