Question

Define one watt:
(A) One joule per second
(B) One second per joule
(C) Ten joules per second
(D) Voltage divided by current
(E) Resistance multiplied by voltage

Answer 1

Hint:Here we have to examine the options and see what one watt means. It is the amount of energy that an object takes to function. Electricity flowing at a rate of one joule per second corresponds to one watt. Watt is the unit of power.

Complete step by step answer:
Unit of power is watt. It is the amount of energy that an object takes to function. Electricity flowing at a rate of one joule per second corresponds to one watt.
One watt:-If a circuit has pure resistance and we use a one volt voltage in that circuit from which the load generates one ampere current, then the power consumed is one watt.
The rate at which energy is either produced or consumed is power.The power to do work such as producing light, fire or motion is energy.The unit of energy is watt-hour or joules. It is the amount of energy spent by an object over a given timeframe. It is also a way to quantify the amount of work produced or carried out.
Power is mathematically given by-
$P = \dfrac{E}{t}$
where $P$ is the power, $E$ is the energy and $t$ is the time taken.
As we can see option B cannot be correct because as watt is the unit of power and here one second per joule is not equal to power.
Option C also cannot be correct because here we have to define one watt and not ten watt.
Option D is not at all correct because voltage divided by current is equal to resistance and not one watt.
Option E is incorrect because there exists no law or formula as voltage multiplied by resistance.
Hence option A is the correct answer.

Note:There may arise some confusion between options A and B as both appear the same.But, we should remember the formula of power to get the answer and power can be defined as the rate of doing.