Question

How much heat is produced by 1500w heater in 7 minutes

Answer 1

Answer:

84 w I think in one minute 120 Watt s are present.I think ok

Answer 2

Answer:

The heat produced by the heater is 6.3×10⁵J.

Explanation:

The heat produced by the  heater is given as,

$H=I^2Rt$         (1)

Where,

H=heat produced by the heater

I=current through the heater

R=resistance of the heater

t=time taken

Also, the power of an electrical device is given as,

$P=V\times I$                        

$P=I^2R$       (2)        (∴V=I×R)

By substituting equation (2) in equation (1) we get;

$H=Pt$           (3)

From the question we have,

P=1500W

t=7 minutes=7×60=420 seconds

By putting the value of P and t in equation (3) we get;

$H=1500\times =630000=6.3\times 10^5J$

Hence, the heat produced by the heater is 6.3×10⁵J.