Question 1

What is the total resistance of this parallel circuit?

Accepted Answer

0.96 Ω

Answer

384 Ω

Answer

20 Ω

Answer

1.21 Ω

Question 2

What is the current leaving the battery?

Accepted Answer

8.33 A

Answer

2.50 A

Answer

0.40 A

Answer

10.67 A

Question 3

A smart phone uses three different batteries connected in a series to extend the battery life and to generate enough energy necessary to power the device. If each battery is rated at 2.4 V, what is the total voltage provided to the phone?

Accepted Answer

7.2 V

Answer

0 V

Answer

2.4 V

Answer

13.8 V

Question 4

A 12.0 V battery is connected in series with two 10 Ω resistors. What is the  current moving through either of the resistors?

Accepted Answer

0.6 A

Answer

120 A

Answer

1.7 A

Answer

240 A

Question 5

A 20A fuse is connected in series with a circuit containing a 240 V source. What is the
minimum resistance required to prevent the fuse from melting?

Accepted Answer

12 Ω

Answer

240 Ω

Answer

120 Ω

Answer

0.83 Ω

Question 6

A student examining a flashlight observes that it uses a traditional incandescent light
bulb. The power rating of the bulb is 60 W, and the bulb is connected to 36 V. 
What is the current moving through the bulb?

Accepted Answer

1.7 A

Answer

96 A

Answer

24 A

Answer

2,160 A

Question 7

What is the total electrical energy used by a 9 V battery when connected to a 15 Ω resistor for 25 seconds?

Accepted Answer

135 J

Answer

30,375 J

Answer

41.7 J

Answer

5.4 J

Question 8

Which of the following must be the same for both resistors R1 and R2?

Accepted Answer

Voltage

Answer

Energy dissipated

Answer

Current

Answer

Power consumed

Question 9

One light bulb in the kitchen burns out and suddenly several lights go out in the house. This would provide evidence that the bulbs were wired in

Accepted Answer

series

Answer

reverse

Answer

parallel

Answer

different circuits

Question 10

A student creates a parallel circuit that has three branches. The student places a resistor on each branch of the circuit so that each path has only one resistor. The student collected some of the electrical measurements in the circuit and recorded them below.  Based on the information above, which values should replace the A, B, and C in the Student Circuit Data table?

Accepted Answer

A = 9 Volts, B = 9 Ohms, and C = 3 Amps

Answer

A = 9 Ohms, B = 4.5 Amps, and C = 3 Volts

Answer

A = 3 Ohms, B = 4.5 Amps, and C = 24 Volts

Answer

A = 3 Volts, B = 9 Ohms, and C = 24 Amps

Question 11

Find the total resistance of the circuit shown above.

Accepted Answer

30 ohms

Answer

35 ohms

Answer

10 ohms

Answer

6.7 ohms

Question 12

If the battery is 10.0 volts, what is the power dissipated by the circuit in the graphic?

Accepted Answer

3.33 watts

Answer

100 watts

Answer

0.9 watts

Answer

12 watts

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