Resistance and Power MCQs

Question 1

How do fixed resistors usually fail?

Accepted Answer

by becoming an open circuit

Answer

slowly over time

Answer

by increasing their value

Answer

by increasing their value and becoming an open circuit

Question 2

With Ohm's law, if voltage increases and resistance stays the same:

Accepted Answer

current increases

Answer

current remains the same

Answer

power decreases

Answer

resistance decreases

Question 3

Which formula shows a direct proportionality between power and voltage?

Accepted Answer

P = VI

Answer

V = IR

Answer

P = IR

Answer

I = V/R

Question 4

With 1 mA of current, what wattage rating should a 470 ohm resistor have?

Accepted Answer

1/4 watt

Answer

1/2 watt

Answer

1 watt

Answer

2 watts

Question 5

What resistor type is found in SIPs and DIPs?

Accepted Answer

thick film

Answer

metal film

Answer

wirewound

Answer

metal oxide

Question 6

Ohm's law is not:

Accepted Answer

R = IV

Answer

V = IR

Answer

I = V/R

Answer

R = V/I

Question 7

What are the two major categories for resistors?

Accepted Answer

fixed and variable

Answer

low and high ohmic value

Answer

commercial and industrial

Answer

low and high power value

Question 8

How many connections does a potentiometer have?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 9

The six basic forms of energy are:

Accepted Answer

electrical, mechanical, light, heat, magnetic, and chemical

Answer

light, sun, magnetic, chemical, electrical, and mechanical

Answer

electrical, mechanical, sun, heat, chemical, and light

Answer

potential, sun, light, chemical, electrical, and mechanical