Electronics - Resistance and Power

Exercise :: Resistance and Power - General Questions

51. 

If a metallic conductor has a positive temperature coefficient of resistance, then:

A. as temperature increases, resistance decreases
B. as current increases, resistance decreases
C. as voltage increases, current increases
D. as temperature increases, resistance increases

Answer: Option D

Explanation:

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52. 

What value of a 1.3 komega.gif resistor as measured by a digital voltmeter would be considered within tolerance?

A. 1234 omega.gif
B. 1235 omega.gif
C. 1366 omega.gif
D. 1367 omega.gif

Answer: Option B

Explanation:

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53. 

If a calculator display was "0.00263," what would this answer be in percent?

A. 0.026%
B. 0.26%
C. 2.63%
D. 26.3%

Answer: Option B

Explanation:

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54. 

A 33 komega.gif resistor with a 20% tolerance checks out as ok with which of the following ohmmeter readings?

A. 26400 ohms
B. 24183 ohms
C. 6600 ohms
D. 39970 ohms

Answer: Option A

Explanation:

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55. 

For P = V2/R, a decrease in resistance should produce:

A. a decrease in power
B. an increase in ohms
C. an increase in power
D. a decrease in current

Answer: Option C

Explanation:

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