Physics Test 26

Total Questions: 25

1 - When the door of an operating refrigerator opened the temperature of the room will

A ) Decrease
B ) Remain unchanged
C ) Fall down immediately
D ) Increase ✅

2 - An electronic motor is used to convert

A ) Electrical energy into mechanical energy
B ) Mechanical energy into kinetic energy
C ) Mechanical energy into electrical energy ✅
D ) Higher voltage to lower voltage

3 - Two parallel wires carrying currents in the same direction attract each other because of

A ) Potential difference between them
B ) Mutual inductance between them
C ) Electric forces between them ✅
D ) Magnetic forces between them

4 - Energy of a body due to its motion is called

A ) Heat energy
B ) Kinetic energy ✅
C ) Potential energy
D ) Light energy

5 - A moving ball stops due to the action of

A ) Nuclear Force
B ) Frictional Force ✅
C ) Electric Force
D ) Magnetic Force

6 - The energy stored in a stretched spring is

A ) Potential energy
B ) Kinetic energy
C ) Heat energy
D ) Elastic potential energy ✅

7 - In cells chemical energy is transformed into

A ) Kinetic energy
B ) Potential energy
C ) Heat energy
D ) Electrical energy ✅

8 - When a body,is dropped from a certain height,the gravitational potential energy is converted into

A ) Elastic potential energy
B ) Chemical energy
C ) Kinetic energy ✅
D ) Light energy

9 - Human body concerts chemical potential energy of food into

A ) Kinetic energy
B ) Light energy
C ) Nuclear energy
D ) Heat energy ✅

10 - Electrochemical energy is required for the working of

A ) Circulatory system
B ) Nervous system ✅
C ) Excretory system
D ) Digestive system

11 - When the cat leaps for its prey then the chemical energy present in its muscles is converted to

A ) Potential energy then to light energy
B ) Potential energy then to kinetic energy ✅
C ) Electrical energy then to heat energy
D ) Heat energy then to Nuclear energy

12 - The energy stored in the fossil fuel is

A ) Chemical energy ✅
B ) Heat energy
C ) Electrical energy
D ) Elastic potential energy

13 - Semi-conductor is such a substance, whose ability to conduct current lies in between

A ) Conductors and insulators ✅
B ) Conductors and superconductors
C ) Insulators and superconductors
D ) Wood and plastic

14 - Through the temperature inside lighted electric bulb is around 2700°C,the filament does not burn because:

A ) The metal of which it is made is resistant to burning
B ) The oxygen necessary for combustion (and burning) is not available as the bulb is evacuated and filled with pure nitrogen or inert gases ✅
C ) It does not burn in closed system
D ) It is made of non-metallic substance

15 - A remote control gadget(for TV etc.) has in it:

A ) A small electromagnet,that emits electromagnetic
B ) A small oscillator that emits electric pulses
C ) A small transmitter that emits infrared signals ✅
D ) None of these

16 - The atmosphere exerts enormous pressure on us. But we don't feel it because:

A ) We are used to it
B ) Our bones are very strong and can withstand this pressure
C ) The surface area of our head is very small
D ) Our blood exerts a pressure slightly more than that of the atmosphere ✅

17 - Lightning is formed when:

A ) Similar charges of electricity rush towards each other and then get replied
B ) Clouds strike against impurities in air and the friction burns up these impurities
C ) Strong opposite charges in different clouds breakdown the resistance offered by the intervening air. ✅
D ) Water vapour produces electricity in the clouds

18 - A semi-conductor is also used as

A ) Capacitor
B ) Transformer
C ) Electronic motor
D ) Rectifier ✅

19 - The wave which do not require any medium is

A ) Sound wave
B ) Air waves
C ) Electromagnetic waves ✅
D ) Water waves

20 - Radio waves are

A ) Sound waves
B ) Electromagnetic waves ✅
C ) Water waves
D ) Heat waves

21 - A. C. voltage is

A ) Chemical quantity
B ) Digital quantity
C ) Analogue quantity ✅
D ) Mathematical quantity

22 - In Binary system,the figure 361 is written as

A ) 10101101
B ) 1001101
C ) 10110111
D ) 101101001 ✅

23 - The device which converts analogue signal to digital signal is called

A ) Transformer
B ) CPU
C ) Modem ✅
D ) Photodiode

24 - For making laser, usually we use

A ) Uranium
B ) Ruby ✅
C ) Magnesium
D ) Iron

25 - Argon laser is used for Operating the

A ) Eye cancer
B ) Glaucoma ✅
C ) Kidney stone
D ) Bone disease