Welcome to your work , Energy & power - 4
1.
The binding energy per nucleon is maximum for nuclei around mass number
2.
The source of energy in fossil fuels is originally
3.
Sun produces energy by
4.
The work done by friction on a body moving with constant speed is
5.
An electric heater works on conversion of electrical energy mainly into
6.
According to Einstein, mass-energy equivalence implies
7.
The energy obtained from food is stored as
8.
LPG is widely used because it
9.
Chemical energy is ultimately converted into muscular energy during
10.
Friction is called a non-conservative force because
11.
If electrical energy is supplied at 500 J/s, the power of the device is
12.
Which of the following is NOT a nuclear fuel?
13.
Chemical energy arises due to
14.
A body moves in a closed path under a force. Net work done is zero if force is
15.
Increase in temperature due to friction indicates increase in
16.
200 J of energy consumed per second equals
17.
Nuclear energy differs from chemical energy because
18.
Which of the following is a conservative force?
19.
When palms are rubbed together, the rise in temperature is due to
20.
In nuclear fusion, energy is released because
21.
Petrol engine converts chemical energy mainly into
22.
Which law governs attraction and repulsion of charges?
23.
Fusion is difficult on Earth because it requires
24.
Most destructive weapons use
25.
Burning 1 kg of coal releases energy mainly because
26.
The large energy output of nuclear reactions is due to
27.
Nuclear reactions release huge energy because
28.
An exothermic reaction is one in which
29.
Which reaction absorbs energy from surroundings?
30.
Energy equivalent of 1 g mass is approximately
31.
4200 J of heat raises temperature of 1 kg water by
32.
Energy released in nuclear fission comes from
33.
A mass of 1 kg corresponds to energy nearly equal to
34.
According to Einstein, mass and energy are related by
35.
The principle behind hydrogen bomb is
36.
Matter can neither be created nor destroyed was modified after
37.
Nuclear fission reaction is best sustained when neutrons used are
38.
Average electrical energy consumption of an urban Indian household per second is about
39.
The reason electric bulbs glow is
40.
Which process involves direct conversion of mechanical energy to heat?
41.
A block slides on a rough surface and finally stops. The mechanical energy lost is converted mainly into
42.
The calorific value of a fuel represents
43.
Speed of light in vacuum used in E = mc² is approximately
44.
A 100 W bulb converts electrical energy mainly into
45.
When a block slides down a rough incline, which quantity remains conserved?
