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Electronics - Ohm's Law

Exercise : Ohm's Law - General Questions
6.
What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?
43.75
70
43,750
70,000
Answer: Option
Explanation:
(1,750 x 40)/1000 = 70 kilowatt-hour.
7.
A damaged resistor
may appear burned
may have an increased resistance value
may be checked with an ohmmeter
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Power supplies differ from batteries in that
power supply output voltages are ac and not dc
power supply voltages are not stable
power supplies are low-current devices
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.

What is the resistor value in the given circuit?

200 omega.gif
1 komega.gif
2 komega.gif
4 komega.gif
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
If voltage across a resistance doubles
the current is halved
the resistance doubles
the current is unchanged
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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