Question

Solve the following problems. Show your complete solution.

!. What is the current in 160V if the resistance is 20Ω.?

2. What voltage is required to move 6A through 10Ω?

3. An alarm clock draws 0.7A when connected to a 120V

circuit. Calculate its resistance.

4. A walkman uses four standard 1.5V batteries. How much

resistance is in the circuit if it uses a current of 0. 02A ?

5. How much voltage would be necessary to generate 20A of

current in a circuit that has 55Ω

Answer 1

Explanation:

The primary concept of these questions is:

Voltage = Current × Resistance

V = IR

(1)

160 = 20×I

So, Current = 8 A

(2)

V = 6×10

So, Voltage = 60 V

(3)

120 = 0.7×R

So, Resistance = 171.43 ohm (approx)

(4)

1.5 = 0.02×R

So, Resistance = 75 ohm

(5)

V = 20×55

So, Voltage = 1100 V

Hope this helps you :)