Calorie is the unit of

(a)

heat

(b)

work

(c)

temperature

(d)

food

The specific heat capacity of water is

(a)

4200 Jkg^-1K^-1

(b)

420 Jg^-1K^-1

(c)

0.42 Jg^-1K^-1

(d)

4.2 Jkg^-1K^-1

Two cylindrical rods of same length have the area of cross section in the ratio 2:1. If both the rods are made up of same material, which of them conduct heat faster?

(a)

Both rods

(b)

Rod-2

(c)

Rod-1

(d)

None of them

Two cylinders of equal height and radius are made of copper and aluminium. Which of them conducts heat faster?

(a)

Copper rod

(b)

Aluminium rod

(c)

Both of them

(d)

None of them

A device in which the loss of heat due to conduction, convection and radiation is minimized in

(a)

Solar cell

(b)

Solar cooker

(c)

Thermometer

(d)

Thermos flask

Water is used as a coolant because it________

(a)

is inexpensive

(b)

is easily available

(c)

is a good conductor of heat

(d)

has a high specific heat capacity

The temperature at which a liquid gets converted into its vapour state is called its________

(a)

melting point

(b)

boiling point

(c)

dew point

(d)

freezing point

Which of the following is true?

(a)

1 J = 412 calorie

(b)

1 J = 0.24 calorie

(c)

1 calorie = 4.2 J

(d)

Both b and c

Which one of the following scales has lower fixed point at 0°C?

(a)

Kelvin scale

(b)

Fahrenheit scale

(c)

Celsius scale

(d)

All of these

In which of the following, chemical energy is converted into heat energy?

(a)

Heater

(b)

Refrigerators

(c)

Candle

(d)

Motor