Electrical energy is supplied at a constant power (expressed in kilowatt) for a time…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Electrical energy

E

is supplied at a constant power

P

(expressed in kilowatt) for a time

t

(expressed in hour). Which of the following expressions gives

E

in joule? (a)

E = 1000\,P\,t\times360

(b)

E = 1000\,P\,t\times3600

(c)

E = P\,t\times3600

(d)

E = 1000\,P\,t\times60