II. Answer the following questions 7. An electric heater of resistance 50 is connected to an electric source. Ta current of 6A flows through the heater, then find the amount of beat pruduced in 5 minutes,
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Heat energy produced in 5 minutes = 54,000 joules
Given:
Resistance (R) = 5 ohms
Current (I) = 6A
Time(t) = 5 minutes = 300 seconds
Potential difference (V) = IR ( ohm's law)
=> V = 6 x 5
= 30V
Power of the electric heater = VI
= 30 x 6
= 180W
Heat energy = Power x time
= 180 x 300
= 54000J
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