Priyanka B Solutions for Chapter: Work and Energy, Exercise 6: Assignment

What is S.I unit of power? (watt/joule)

Joule per second is the unit of which physical quantity?

What is the commercial unit of energy?

(Choose from the following: $\mathrm{kWh}/ \mathrm{J}$)

At what rate is electrical energy consumed in a $60 \mathrm{W}$ bulb?

Establish a relationship between S.I. unit and commercial unit of energy.

Define $1$ watt.

An electric bulb of $60 \mathrm{W}$ is used for $6$ hours per day. Calculate the units of energy consumed in one day by the bulb.

Calculate the electricity bill amount for a month of April if $4$ bulbs of $40 \mathrm{W}$ for $5$ hour, $4$ tube-light of $60 \mathrm{W}$ for $5$ hour, a TV of $100 \mathrm{W}$ for $6$ hour, a washing machine of $400 \mathrm{W}$ for $3$ hour are used per day. The cost per unit is $1.80$