Physics Quiz Set 3
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Question 1 |
An iron ball and a wooden ball of same radius are released from a height ‘h’ in vacuum. Which of the two balls would take more time to reach the ground?
A | Iron ball |
B | Both would take same time |
C | Wooden ball |
D | None of these |
Question 2 |
If an object undergoes a uniform circular motion, then its
A | acceleration remains uniform |
B | velocity changes |
C | speed changes |
D | velocity remains uniform |
Question 3 |
Which one of the following remains constant while throwing a ball upward ?
A | Displacement |
B | Kinetic energy |
C | Acceleration |
D | Velocity |
Question 4 |
A passenger in a moving train tosses a five rupee coin. If the coin falls behind him, then the train must be moving with a uniform
A | acceleration |
B | deceleration |
C | speed |
D | velocity |
Question 5 |
An athlete diving off a high springboard can perform a variety of exercises in the air before entering the water below. Which one of the following parameters will remain constant
during the fall?
A | The athlete’s linear momentum |
B | The athlete’s moment of inertia |
C | The athlete’s kinetic energy |
D | The athlete’s angular momentum |
Question 6 |
Statement A : While drawing a line on a paper, friction force acts on paper in the same direction along which line is drawn on the paper.
Statement B : Friction always opposes motion.
A | Statement A is correct |
B | Statement B is correct. |
C | Both statements are correct. |
D | Both statements are incorrect |
Question 7 |
Kerosene oil rises up in a wick of lantern because of
A | capillarity |
B | buoyant force |
C | diffusion of oil through the wick |
D | None of the above |
Question 8 |
The tendency of a liquid drop to contract and occupy minimum area is due to :
A | surface tension |
B | viscosity |
C | density |
D | vapour pressure |
Question 9 |
Timbre is called the quality of sound. One can recognise the voice of a familiar human being or instrument without actually seeing them. This quality is associated with
A | material of the body |
B | overtones present in the sound |
C | shape of the body |
D | all of the above |
Question 10 |
In which one of the following cases Ohm’s law is not valid?
A | Wire bound resistor |
B | Potentiometer |
C | Junction diode |
D | Electric bulb |
Question 11 |
The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for
A | a microscope |
B | a telescope |
C | both microscope and telescope |
D | neither microscope nor telescope |
Question 12 |
Yellow colour light is used as fog light because yellow colour
A | light is most scattered by fog |
B | has the longest wavelength among all colours |
C | has the longest wavelength among all colours except
red and orange but the red colour is already used for
brake light and stop light whereas orange colour is
avoided due to its similarity with red |
D | has the shortest wavelength among all colours not
already reserved for other purpose |
Question 13 |
The main constituent of biogas is
A | methane |
B | carbon dioxide |
C | hydrogen |
D | hydrogen sulphide |
Question 14 |
Propane is used instead of natural gas on many farms and in rural areas. Why is propane often used instead of natural gas?
A | It’s safer |
B | It’s portable |
C | It’s cleaner |
D | It’s cheaper |
Question 15 |
Which part of the solar cooker is responsible for green house effect?
A | Coating with black colour inside the box |
B | Mirror |
C | Glass sheet |
D | Outer cover of the solar cooker |
Question 16 |
At absolute zero, Si acts as
A | non-meta |
B | metal |
C | insulator |
D | None of these |
Question 17 |
If the focal length of the biconvex lens is 25 cm, then the power of the lens will be
A | + 4 dioptre |
B | – 4 dioptre |
C | + 0.04 dioptre |
D | – 0.04 dioptre |
Question 18 |
Which one among the following denotes the smallest temperature
A | 1° on the Celsius scale |
B | 1° on the Kelvin scale |
C | 1° on the Fahrenheit scale |
D | 1° on the Reaumur scale |
Question 19 |
Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent
A | reduces drastically the surface tension between water
and oil |
B | increases the surface tension between water and oil |
C | increases the viscosity of water and oil |
D | decreases the viscosity in detergent mixed water |
Question 20 |
For a given mass and size, moment of inertia of a solid disc is
A | more than that of a ring |
B | less than that of a ring |
C | equal to that of a ring |
D | depend on the material of ring and disc |
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