Ohm's Law

Question 1

Which statement describes the relationship of voltage and current?

Revolt · Accepted Answer

Voltage is directly proportional to current because I = .

Question 2

If voltage in a circuit is constant, the current can be cut to half of its original value by changing the resistance to ________ its original value.

Revolt · Accepted Answer

two times

Question 3

Kaya collects the data shown in the table.

Revolt · Accepted Answer

20

Question 4

Jaipal measures a circuit at 1.2 A and 24 . Using Ohm’s law, what can he calculate for the circuit?

Revolt · Accepted Answer

voltage (V)

Question 5

Which statement describes the relationship of resistance and current?

Revolt · Accepted Answer

Resistance is inversely proportional to current because R = .

Question 6

What is the resistance of a light bulb if a potential difference of 120 V will produce a current of 0.5 A in the bulb?

Revolt · Accepted Answer

240

Question 7

A hair dryer has a resistance of 11.5 . What current does it conduct when it is plugged into a wall outlet that provides 120 V?

Revolt · Accepted Answer

10.4 A

Question 8

Which symbol and unit of measurement are used for resistance?

Revolt · Accepted Answer

symbol: R; unit :

Question 9

According to Ohm’s law, which combination of units is the same as the unit for resistance?

Revolt · Accepted Answer

volt ÷ ampere

Question 10

A circuit has a current of 2.4 A. The voltage is increased to 4 times its original value, while the resistance stays the same.

Revolt · Accepted Answer

It should increase to four times its value.

Ohm's Law Answers