Energy

Q.

What are the five different types of energy?

Q.

An electric bulb 60W is used 6 hours per day. Calculate the units of energy consumed in a day.

Q. Explain potential energy and kinetic energy with examples and questions

Q.

Define work. Write its formula. What is the SI unit of work? Is it a scalar or a vector quantity?

Q.

Define power. Write SI unit of power.

Q.

Write the energy transformations which take place in an electric bulb (or electric lamp).

Q.

What is the relation between one kilowatt-hour and joule?

Q. How to convert watt into Kilowatt and kilowatt into watt

Q.

Microphones convert sound energy into …………..

Q.

Define energy and state its unit.

Q.

One newton-metre is equal to one _____.

1. volt

2. hertz

3. joule

4. ampere

Q.

Define kilowatt-hour.

Q.

Which of the following is not a state variable?

1. Pressure

2. Heat

3. Volume

4. Temperature

Q. Establish the relationship between the commercial unit and the S.I unit of energy

Q.

1 Joule(J) = 10⁷ ergs(erg)

1. True

2. False

Q.

Name the types of mechanical energy.

Q.

What are the four different types of energy that can be stored?

Q.

(a) Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule).

(b) A certain household consumes 650 units of electricity in a month. How much is this electricity in joules ?

Q.

A cell converts one form of energy into another form. Name the two forms.

Q.

(a) Define the term 'energy' of a body. What is the SI unit of energy.

(b) What are the various forms of energy ?

(c) Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.

Q. A photocell converts light energy into:

1. Photon energy
2. Electrical energy
3. Magnetic energy
4. Heat energy

Q.

State the Amperes swimming rule.

Q.

How is work and energy related to each other?

Q.

The Cheapest Plant in Operation and Maintenance is....... Select one: 0. a. Staem power plant O b. Nuclear power plant O C. Hydro-electric power plant d. None of the above

Q.

A body is kept in rest at some height. Kinetic energy of body is zero.

1. True

2. False

Q.

$∆U$ is equal to:

1. Adiabatic work

2. Isothermal work

3. Isochoric work

4. Isobaric work

Q.

Is sound potential or kinetic energy?

Q.

What is SI unit of kinetic energy?

Q.

Device that transforms one form of the energy into another form of energy is called a ___________

1. Transducer

2. Transformer

3. Transponder

4. Transistor

Q. Question 20
Find the energy in kWh consumed in 10 hours by four devices of power 500 W each.