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An electric heater of resistance 8 Ω draws 15 A from the service mains for 2 hours. Calculate the rate of which heat is developed in. the heater

An electric heater of resistance 8 Ω draws 15 A from the service mains for 2 hours. Calculate the rate of which heat is developed in. the heater

Grade:12

3 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

1800 Wall.

Thanks
Aryan Bharadwaj
25 Points
3 years ago
For solving this we use the formula
H = I²Rt
→ H = 15² × 8 × 2
→ H = 3600 Joules
Hope my answer helps you
irshad hussain
99 Points
2 years ago

Given parameters

The resistance of the electric heater (R) = 8 Ω

Current drawn (I) = 15 A

Time = 2 hrs

T = 120 min x 60

Time (T) = 7200 secs

The rate of heat produced by the device in terms of power is expressed as

P= I2R

P = 15 x 15 x 8

P = 1800 watt

Answer

P= 1800 wat

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