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1. There are four resistors in a circuit with an applied voltage of 120V. The voltage drops across three resistors is 15V each. What is the voltage drop across the fourth resistor?

15V

75V

120V

45V

Question 1 of 20

The voltage drop across the parallel resistors shown in the figure above is ________.

62.1 volts

17.3 volts

100 volts

20.7 volts

Question 2 of 20

3. Two resistances of 30 and 25 ohms are connected in parallel. In series with this combination is a 40-ohm resistance, and in parallel with this total combination is a 28-ohm resistance. Given a voltage of 1.28 volts, the total current flowing through the circuit is ________.

60 milliamps

95 milliamps

55 milliamps

70 milliamps

Question 3 of 20

4. In a parallel circuit, the total line current must equal ________.

the sum of the branch currents

the branch current divided by the total resistance

zero

the branch current divided by the number of resistors

Question 4 of 20

5. What is the total resistance of three resistors in parallel with values of 2 ohms, 8 ohms, and 14 ohms?

2.65 ohms

2.32 ohms

1.44 ohms

2.24 ohms

Question 5 of 20

6. A circuit in which two or more components are connected equally across the same voltage source is a ________.

resistive circuit

series circuit

series-parallel circuit

parallel circuit

Question 6 of 20

How many amps of current would flow through the circuit in the figure above?

4.14

3.24

5.21

Question 7 of 20

8. The total resistance of four resistors in parallel with values of 3, 10, 25, and 50 ohms is ________.

2.75 ohms

3.33 ohms

1.66 ohms

2.03 ohms

Question 8 of 20

9. Given: A circuit has a voltage of 100 volts across five resistors in parallel (5, 14, 21, 25, and 100

36.9 amps

12.71 amps

25.3 amps

ms). The total current is ________.

20.2 amps

Question 9 of 20

10. What is the resistance of a light bulb that uses 15 watts of power when placed across a 15-volt battery?

150 ohms

50 ohms

1.5 ohms

15 ohms

Question 10 of 20

11.

What is the total resistance of the circuit in the figure above?

50 ohms

19 ohms

29 ohms

30 ohms

Question 11 of 20

12. What is the total resistance of three resistors in parallel with values of 4 ohms, 10 ohms, and 25 ohms?

2.56 ohms

3.43 ohms

2.25 ohms

1.50 ohms

Question 12 of 20

13. If a circuit with a source of 200 volts is connected across four parallel 50-ohm resistors, the current through each resistor is ________.

1 amps

2 amps

4 amps

3 amps

Question 13 of 20

14. The total voltage in a circuit with voltage drops of 15V, 25V, and 20V is ________.

120V

20V

180V

60V

Question 14 of 20

15.

What is the total resistance of the circuit in the figure above?

70.41 ohms

15.32 ohms

24.17 ohms

120.12 ohms

Question 15 of 20

16. According to Kirchhoff's voltage law, the total voltage drop in a circuit is equal to the ________.

total resistance in the circuit

voltage of the power source

current divided by resistance

total current in the circuit

Question 16 of 20

17. Which of the following is considered a voltage rise?

A resistor

A motor

The source

A diode

Question 17 of 20

18. According to Kirchhoff's current law, the current in a parallel circuit is equal to ________.

zero

the applied voltage

the sum of the currents in each branch

the total voltage drop

Question 18 of 20

19. If R3 was removed from the circuit in the figure above, how many amps of current would flow through the circuit?

Question 19 of 20

20. The statement that total current entering a point must equal total current leaving that point best describes ________.

The Theory of Relativity

Ohm's law

Kirchhoff's current law

Coulomb's total current law

Question 20 of 20

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