Physics Quiz Set 2

Physics Quiz 2

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Question 1

Which of the following is not a fundamental unit?

A	newton
B	kilogram
C	metre
D	second

Question 2

In SI units the number of basic physical quantities are

A	3
B	7
C	9
D	21

Question 3

Light year is

A	light emitted by the sun in one year
B	time taken by light to travel from sun to earth
C	the distance travelled by light in free space in one year
D	time taken by earth to go once around the sun

Question 4

Practical unit of heat is

A	Calorie
B	Horse power
C	Joule
D	Watt

Question 5

Which one among the following is correct for resultant of balanced forces?

A	It is zero
B	It is non -zero
C	It varies continuously
D	None of the above

Question 6

When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained by

A	the theory of relativity
B	Newton’s first law
C	Newton’s second law
D	Newton’s third law

Question 7

A book is kept on the surface of a table. If the gravitational pull of the earth on the book is the force of action, then the force of reaction is exerted by

A	the book on the table
B	the book on the earth
C	the table on the book
D	the table on the earth

Question 8

An astronaut in the orbit in a spacecraft feels weightlessness

A	due to the absence of gravity inside
B	due to the face that space craft has no energy
C	because acceleration in the orbit is equal to acceleration of gravity outside
D	their is no gravity outside

Question 9

If the moon is to escape from the gravitational field of the earth forever, it will require a velocity

A	11.2 km/s
B	less than 11.2 km/s
C	slightly more than 111.2 km/s
D	22.4 km/s

Question 10

In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true ?

A	Gravitational force is stronger than the other two.
B	Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive
C	Gravitational force has a very short range
D	Gravitational force is a long range force, while the other two are short range forces

Question 11

The turntable of a gramophone is rotated at a constant speed of x revolutions/minute. Which one of the following values of the revolutions per minute is not used ?

A	78 r.p.m.
B	56 r.p.m.
C	45 r.p.m.
D	33 r.p.m.

Question 12

Why is sound heard with more intensity through CO2 than through the air ?

A	Density of CO2 is more than that of air
B	Density of CO2 is less than that of air
C	Air is bad conductor of heat
D	CO2 is a compound, but air is a mixture of gases

Question 13

Which one of the following properties distinguishes ultrasound from normal audible sound?

A	Intensity
B	Speed of propagation
C	Frequency
D	Quality

Question 14

Two pieces of conductor of same material and of equal length are connected in series with a cell. One of the two pieces has cross-sectional area double that of the other. Which one of the following statements is correct in this regard ?

A	The thicker one will allow stronger current to pass through it
B	The thinner one would allow stronger current to pass through it.
C	Same amount of electric current would pass through both the pieces producing more heat in the thicker one.
D	Same amount of electric current would pass through both the pieces producing more heat in the thinner one.

Question 15

Magnetism of a bar magnet can be destroyed if it is

kept in the magnetic meridian.
placed in a direction opposite to that of the Earth'shorizontal intensity.
heated to a temperature known as Curie temperature.

Select the correct answer using the code given below

A	I and III only
B	II only
C	II and III only
D	I, II and III

Question 16

A wire of resistance 16 W is bent in the form of a circle. What is the effective resistance between diametrically opposite points?

A	1 W
B	2 W
C	4 W
D	8 W

Question 17

Fluorescent tubes are fitted with a choke. The choke coil :

A	steps up the line voltage
B	steps-down the line voltage
C	reduces current in the circuit
D	chokes low frequency current

Question 18

If an a-particle is projected normally through a uniform magnetic field, then the path of the a-particle inside the field will be

A	circular
B	parabolic
C	elliptical
D	a straight line

Question 19

Which one of the following is correct about The wavelength of the X-rays

A	is longer than the wavelength of sound waves
B	is longer than the wavelength of the yellow sodium light
C	is longer than the wavelength of radio waves
D	is of the order of 0.1 nanometer

Question 20

Light Emitting Diode (LED) converts

A	light energy into electrical energy
B	electrical energy into light energy
C	thermal energy into light energy
D	mechanical energy into electrical energy

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Physics Quiz 2

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Physics Quiz 2

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