Electronics - Resistance and Power

Exercise :: Resistance and Power - General Questions

36. 

How many connections does a rheostat have?

A. 1
B. 2
C. 3
D. 4

Answer: Option B

Explanation:

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37. 

What are the parts of a rheostat?

A. wiper and resistor track
B. solenoid and armature
C. contact and wire wound
D. center tape and wiper

Answer: Option A

Explanation:

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38. 

The load resistance increases. How will the load current change?

A. vary
B. remain constant
C. increase
D. decrease

Answer: Option D

Explanation:

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39. 

What is the power dissipated by a 1.2 komega.gif resistor with 12 volts across it?

A. 12 W
B. 1.2 W
C. .12 W
D. 12 mW

Answer: Option C

Explanation:

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40. 

How many joules of energy will a 10 W lamp dissipate in one minute?

A. 10 joules
B. 60 joules
C. 600 joules
D. 3600 joules

Answer: Option C

Explanation:

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