Physics Quiz Set 08

Question No.1

Dark Glasses decrease the effect of sunlight. This works on the principle of_________

1. Dispersion
2. Distortion
3. Reflection
4. Attenuation

Select Answer

Correct Answer: ( D )  

Question No.2

Which one of the following is used in Solar cookers?

1. Convex Lens
2. Convex Mirror
3. Concave Mirror
4. Concave Lens

Select Answer

Correct Answer: ( C )  

Question No.3

The function of the electroscope is:

1. To identify the presence of electrical charge
2. To produce spark
3. Fix the magnitude of the charge
4. Magnifies the electrons so that they are visible

Select Answer

Correct Answer: ( A )  

Question No.4

Four metal balls are placed in sunlight, which one will be the hottest?

1. Manganese
2. Iron
3. Copper
4. Aluminium

Select Answer

Correct Answer: ( C )  

Question No.5

When the speed of a body is doubled______

1. Its momentum doubles
2. Its acceleration doubles
3. Its kinetic energy energy doubles
4. Its potential energy doubles

Select Answer

Correct Answer: ( A )  

Question No.6

The radioactive elements, which have been found to have huge reserve in India is____

1. Uranium
2. Radium
3. Thorium
4. Plutonium

Select Answer

Correct Answer: ( C )  

Question No.7

Which kind of mirror is used by a dentist?

1. Cylindrical mirror
2. Plane mirror
3. Convex mirror
4. Concave mirror

Select Answer

Correct Answer: ( D )  

Question No.8

The shortest wavelength rays are:

1. X-rays
2. Alpha rays
3. Beta rays
4. Gamma rays

Select Answer

Correct Answer: ( D )  

Question No.9

Hydraulic brakes used in automatic vehicles is the direct use of which?

1. Archimedes' Theory
2. Pascal Rule
3. Bernoulli theorem
4. Faraday Rules

Select Answer

Correct Answer: ( B )  

Question No.10

Magnetic Field has___________

1. Only Direction
2. Only Magnitude
3. Both Direction and Magnitude
4. None of these

Select Answer

Correct Answer: ( C )  

Question No.11

Which of the following instrument is used to measure air pressure?

1. Seismograph
2. Barometer
3. Altimeter
4. Thermometer

Select Answer

Correct Answer: ( B )  

Question No.12

Which of the following is a physical amount, which remains unaffected even after increase in quantity

1. Volume
2. Weight
3. Mass
4. Density

Select Answer

Correct Answer: ( D )  

Question No.13

Wide wooden leases are placed under railway tracks_

1. To act as shock absorbers
2. To properly place fish plates
3. To keep the tracks parallel
4. To reduce the pressure generated by the train

Select Answer

Correct Answer: ( D )  

Question No.14

When a particle is in linear simple periodic motion, its kinetic energy is maximum____________

1. At each point on the way
2. In the middle
3. At medium
4. Half way through the middle

Select Answer

Correct Answer: ( B )  

Question No.15

What is the product of moment of inertia and angular acceleration

1. Force
2. Torque
3. Work
4. Angular momentum

Select Answer

Correct Answer: ( B )  

Question No.16

When an air bubble comes from the bottom of a lake to the surface, then____

1. It widens like a swatch
2. It increases in size
3. It reduces in size
4. Its size remain the same

Select Answer

Correct Answer: ( B )  

Question No.17

Why is the drop of rain circular?

1. Due to surface tension
2. Due to viscosity
3. Due to atmospheric friction
4. Due to gravity

Select Answer

Correct Answer: ( A )  

Question No.18

An object falling freely towards the earth from a height falls with the same____

1. Speed
2. Acceleration
3. Mass
4. Density

Select Answer

Correct Answer: ( B )  

Question No.19

The air conditioning system controls______

1. Temperature
2. Humidity
3. Air velocity
4. All of these

Select Answer

Correct Answer: ( D )  

Question No.20

Why do diamonds shine at night?

1. Diamonds are radioactive, so radiation occurs
2. The rays of light are reflected internally due to high refractive index
3. Diamonds shine because they contain radium in some quantities
4. Diamonds shine because they have tetrahedral molecular structure

Select Answer

Correct Answer: ( B )  

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