Ohm's Law

Question 1

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 2

Which symbol and unit of measurement are used for voltage?

Revolt · Accepted Answer

symbol: V; unit: V

Question 3

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 4

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

Revolt · Accepted Answer

volt ÷ ampere

Question 5

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.

Question 6

A light bulb has a resistance of 360 . What is the current in the bulb when it has a potential difference of 120 V across it?

Revolt · Accepted Answer

0.33 A

Question 7

When the resistance in a circuit remains constant, how are the voltage and current related?

Revolt · Accepted Answer

The current doubles when the voltage doubles because they are directly proportional.

Question 8

Which statement describes the relationship of resistance and current?

Revolt · Accepted Answer

Resistance is inversely proportional to current because R = .

Question 9

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 10

Which statement describes the relationship of voltage and current?

Revolt · Accepted Answer

Voltage is directly proportional to current because I = .

Ohm's Law Answers