Question

29. A bulb is rated as 60 W-220 V. It is connected to an electric mains of 220 volts. How much cus
s.
will flow through it ? Calculate the heat produced by the bulb in 5 minutes.
ampere, 18000 joules.
3
Ans.​

Answer 1

Given:-

• Power of Bulb ,P = 60 W

• Potential Difference ,V = 220v

• Time taken ,t = 5min = 5×60 = 300s

To Find:-

• Current ,I

• Heat Produce ,H

Solution:-

Current is defined as the charge per unit time.

Using this Formula

• P = VI

where

P is the Power

V is the Potential Difference

I is the Current

Substitute the value we get

➨ 60 × 220 × I

➨ I = 60/220

➨ I = 0.27 A

Therefore ,the current flow through it is 0.27 Ampere.

_____________________________________

Now, we have to calculate the Heat Produce by the bulb.

Using this Formula

• H = VIt

Where

H is the heat Produce

V is the Potential Difference

I is the current

t is the time taken

Substitute the value we get

➨ H = 220 × 0.27 × 300

➨ H = 17820 J

Therefore, the heat produced by the bulb is 17820 Joules.

Answer 2

=> P = VI

=> 60 × 220 × I

=> I = 60/220

=> I = 0.27 A

Again

=> H = VIt

=> H = 220 × 0.27 × 300

=> H = 17820 Joules.