Question

Please helppppppppppp
a)What is power? b)Define 1 watt of power. c)A lamp consumes 3500 J of electrical energy in 70 s. What is its power? ​

Answer 1

a) What is Power?

♦ Power is defined as the rate of doing work.

♦ It's S.I unit is watt(W).

b) What is 1 watt of power?

♦ 1 watt of power is defined as the power if a body does work of 1 joule in 1 second.

c) A lamp consumes 3500 J of electrical energy in 70 s. What is its power? ​

Power is given as:

P = work done / time

Here, work done = 3500 J , time = 70 s

Substituting the values,

P = 3500 / 70

or, P = 50 W

Therefore,Power is 50 W.