Question

A electric heater is connected to 240 v supply then 4A current flow through it for 10 minute calculate the quantity of heat generated?

Answer 1

Answer:

16Joules(when time is converted into hours)i.e

10/60

Explanation:

H=v^2/R*T where H=heat,R=resistance,T=time,V=voltage

R=V/I=240/4=60 ohm.

applying in the formula we get H=16joules.

Answer 2

Answer:

576 kilojoules

Explanation:

Given :

• Voltage or potential difference = 240 volts

• Current passing through the electric heater = 4 Amperes

• Time taken = t = 10 minutes = 600 seconds

To find :

• Quantity of heat generated in the electric heater

Heat generated = V×I×T

Heat generated = 240×4×600

Heat generated = 576000 joules

1000 joules = 1 kilojoule

Heat generated = 576 kilojoules

576 kilo joules is the heat generated in the electric heater