Electronics - Resistance and Power

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Exercise : Resistance and Power - General Questions
1.
The resistivity of copper is:
9.9 omega.gif
10.7 omega.gif
16.7 omega.gif
17.0 omega.gif
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
How do fixed resistors usually fail?
slowly over time
by increasing their value
by becoming an open circuit
by increasing their value and becoming an open circuit
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
With Ohm's law, if voltage increases and resistance stays the same:
current remains the same
power decreases
current increases
resistance decreases
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
Which formula shows a direct proportionality between power and voltage?
V = IR
P = VI
P = IR
I = V/R
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
With 1 mA of current, what wattage rating should a 470 ohm resistor have?
1/4 watt
1/2 watt
1 watt
2 watts
Answer: Option
Explanation:
No answer description is available. Let's discuss.