Ohm's Law - General Questions

Directions to Solve

Ohm's Law - General Questions

1.

What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA?

A.	8.2 kΩ
B.	820 Ω
C.	8.2 Ω
D.	82 Ω

Answer: Option D

Explanation:

No answer description available for this question.

2.

What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?

A.	183 Ω
B.	18.3 Ω
C.	66 Ω
D.	6.6 Ω

Answer: Option A

Explanation:

No answer description available for this question.

3.

A 120 V lamp-dimming circuit is controlled by a rheostat and protected from excessive current by a 3 A fuse. To what minimum resistance value can the rheostat be set without blowing the fuse? Assume a lamp resistance of 20 ohms.

A.	40 Ω
B.	4 Ω
C.	2 Ω
D.	20 Ω

Answer: Option D

Explanation:

No answer description available for this question.

4.

Approximately how much current flows through a 3.3 M resistor across a 30 V source?

A.	9µA
B.	90 µA
C.	900 µA
D.	9000 µA

Answer: Option A

Explanation:

No answer description available for this question.

5.

When 12 V are applied across a 68 resistor, the current is

A.	816 mA
B.	17.6 mA
C.	176 mA
D.	8.16 mA

Answer: Option C

Explanation:

No answer description available for this question.

6.

Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?

A.	4 Ω
B.	400 Ω
C.	4 kΩ
D.	4.4 Ω

Answer: Option C

Explanation:

No answer description available for this question.

7.

Four amperes of current are measured through a 24 resistor connected across a voltage source. How much voltage does the source produce?

A.	960 V
B.	9.6 V
C.	96 V
D.	8 V

Answer: Option C

Explanation:

No answer description available for this question.

8.

A current of 200 µA through a 6.8 k resistor produces a voltage drop of

A.	34.4 V
B.	340 V
C.	13.6 V
D.	1.36 V

Answer: Option D

Explanation:

No answer description available for this question.

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