1.

Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5 A current in 5 minutes.

Answer»

Current (I) = 2.5 A 

Resistance = 20 Ω

Time (t) = 5 min= 5 x 60 sec = 300 sec

Quantity of heat produced (H) = I2Rt

= (2.5)2 x 20 x 300

= 37500 J = 37.5 KJ



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