Ohms law

Question 1

What is ohms law

Answer 1

Ohm’s Law states that the voltage across a conductor is directly proportional to the current flowing through it

Question 2

Write the formula for Ohm’s Law.

Answer 2

V=I×R (Voltage = Current × Resistance)

Question 3

What does V stand for in the formula and what is it measured in

V=IR?

Answer 3

Voltage, measured in volts (V).

Question 4

What does I stand for in the formula

V=IR?

Answer 4

Current, measured in amperes (A).

Question 5

What does R stand for in the formula

V=IR?

Answer 5

Resistance, measured in ohms (Ω).

Question 6

How do you calculate current if you know voltage and resistance?

Answer 6

I = V ÷ R

Question 7

How do you calculate resistance if you know voltage and current?

Answer 7

R= V ÷ I

Question 8

A resistor has a resistance of 10 Ω. If a current of 2 A flows through it, what is the voltage across the resistor?

Use V=I×R

Answer 8

V= 2×10=20volts

Question 9

A circuit has a voltage of 12 V and a resistance of 4 Ω. Calculate the current flowing through the circuit.

Answer 9

I= V ÷ R

12 ÷ 4 –> 3 amperes
​

Question 10

The voltage across a component is 9 V and the current through it is 3 A. What is the resistance?
A:

Answer 10

R= V ÷ I

​9 ÷ 3 –> 3 ohms