Energy

Q. An electric bulb converts electrical energy into .

1. solar energy
2. mechanical energy
3. light energy

Q.

A family consumes $14kg$ kerosene in $30$ days. What is the average energy consumed per day, if the calorific value of kerosene is $48kJ{g}^{-1}$?

Q.

Explain what is meant by degraded energy?

Q.

Statement I:- X enables everything to work.

Statement II:- X follows the law of conservation.

Statement III:- X moves from one body to other and it enables things to move, grow or interact.

Identify "X" from the given options.

1. Work

2. Mass

3. Force

4. Energy

Q.

Which of the following statements are correct regarding energy?

1. It is capacity to do work

2. It cannot be created nor be destroyed

3. It can be transferred from one object to other

4. All of these

Q.

An invisible energy which causes in us, the sensation of vision is:

1. electrical

2. sound

3. light

4. mechanical

Q. When a body has the same temperature as that of its surroundings :

1. It does not radiate heat
2. It radiates same quantity of heat as it receives from the surroundings
3. It radiates less quantity of heat as it receives from the surroundings
4. It radiates more quantity of heat as it receives from the surroundings.

Q.

Match the entries of column I with column II.
$$\begin{array}{cc}ColumnI& ColumnII\\ \left(a\right)Theenergywhichproducesthesensationofhearing& i)Lightenergy\\ \left(b\right)Theenergyobtainedfromthesun& \left(ii\right)Soundenergy\\ \left(c\right)Theenergywhichisassociatedwiththemovementofobjects& \left(iii\right)Solarenergy\\ \left(d\right)Theenergywhichproducesthesensationofvision& \left(iv\right)Mechanicalenergy\end{array}$$

1. (a) - (ii), (b) -(iii), (c) - (i), (d) - (iv)

2. (a) - (iii), (b) -(ii), (c) - (iv), (d) - (i)

3. (a) - (iv), (b) -(ii), (c) - (ii), (d) - (iiii)

4. (a) - (ii), (b) -(iii), (c) - (iv), (d) - (i)