Question 1 (2.5 points) Question 1 Unsaved

An alarm clock draws 0.5 A of current when connected to a 120 volt circuit.

Calculate its resistance.

Question 1 options:

a)

150 ohms

b)

120 ohms

c)

60 ohms

d)

240 ohms

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Question 2 (2.5 points) Question 2 Unsaved

If one 9 volt battery is used in a circuit with a total resistance of 39 ohms, what is the current in the circuit?

Question 2 options:

a)

0.35 amps

b)

351 amps

c)

23 amps

d)

0.23 amps

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Question 3 (2.5 points) Question 3 Unsaved

A waffle iron has 12 amp current. If the resistance of the coils is 10 ohms what must the voltage be?

Question 3 options:

a)

240 volts

b)

1.2 volts

c)

120 volts

d)

12 volts

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Question 4 (2.5 points) Question 4 Unsaved

The wire in a series circuit has a resistance of 8 ohms and the light bulb in the circuit has a resistance of 14 ohms. A 66 volt battery provides energy to the entire circuit. What is the current through the entire circuit?

Question 4 options:

a)

4.71 amps

b)

8.25 amps

c)

30 amps

d)

3 amps

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Question 5 (2.5 points) Question 5 Unsaved

The break light on a car is connected to a 12-V battery. If the resulting current is 0.4 amps, what is the resistance of the brake light?

Question 5 options:

a)

30 ohms

b)

4.8 ohms

c)

5.3 ohms

d)

3 ohms

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Question 6 (2.5 points) Question 6 Unsaved

A circuit has a resistance of 30 ohms and a current of 0.05 amps, what is the voltage of the battery?

Question 6 options:

a)

15 volts

b)

12 volts

c)

9 volts

d)

1.5 volts

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Question 7 (2.5 points) Question 7 Unsaved

An electric heater works by passing a current of 100 amp though a coiled metal wire, making it red hot. If the resistance of the wire is 1.1 ohms, what voltage must be applied to it?

Question 7 options:

a)

220 volts

b)

120 volts

c)

110 volts

d)

90.9 volts

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Question 8 (2.5 points) Question 8 Unsaved

What current flows through a hair dryer plugged into a 120 Volt circuit if it has a resistance of 25 ohms?

Question 8 options:

a)

5.3 amps

b)

0.20 amps

c)

4.8 amps

d)

0.5 amps

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Question 9 (2.5 points) Question 9 Unsaved

A subwoofer needs a household voltage of 110 V to push a current of 5.5 amps through its coil. What is the resistance of the subwoofer?

Question 9 options:

a)

2.0 ohms

b)

0.05 ohms

c)

20 ohms

d)

30 ohms

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Question 10 (2.5 points) Question 10 Unsaved

If three 1.5 volt batteries are put into a flashlight and the resistance across the light bulb is 30 ohms, what is the current going through the light bulb?

Question 10 options:

a)

0.15 amps

b)

10 amps

c)

0.05 amps

d)

0.5 amps

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