Question

The potential difference between the terminals of a small heater is 4.2volt of resistance of heater is 30 ohm then heat produced in half minute in calories

Answer 1

Answer:

H=4.2cal

Explanation:

potential difference(V)=4.2volt and resistance(R)=30ohm time taken(t)=1/2min=30sec and we know that heat produced(H)=V^2t/R in joule =V^2t/4.2R in calories

and therefore H=(4.2)^2*30/4.2*30=4.2cal