Question

An electric toaster is rated 1200 watts at 120 volts. what is the total electrical energy used to operate the toaster for 30 seconds

Answer 1

Answer : Total electrical energy is 36000 J.

Explanation :

It is given that,

Power of electric toaster, P = 1200 Watts

Voltage, V = 120 Volts

Time, t = 30 s

Electric energy is defined as the product of the power and the time taken.

$E=Pt$

$E=1200\ W\times 30\ s$

$E=36000\ J$

Total electrical energy used to operate the toaster for 30 seconds is 36000 J.

Answer 2

P = power rating of the electrical toaster = 1200 watts

t = time of operation = 30 sec

E = total electrical energy

Total electrical energy is given as

E = P t

inserting the above values

E = 1200 x 30

E = 36000 J