Physics

Question 1

A cylinder with platinum-iridium alloy is used to
define the kilogram. What is the name of this
cylinder?
a. Le Grand K
b. pti alloy
c. standard kilogram
d. standard mass

Answer 1

a

Question 2

What is the cgs unit of force?
a. Newton
b. erg
c. dyne
d. poise

Answer 2

c

Question 3

The “triple point” of a substance is that point for
which the temperature and pressure are such that:
a. only solid and liquid are in equilibrium
b. only solid and vapor are in equilibrium
c. only liquid and vapor are in equilibrium
d. solid, liquid, and vapor are all in equilibrium

Answer 3

d

Question 4

Which one of the following statements is true?
a. Temperatures differing by 25◦ on the Fahrenheit
scale must differ by 45◦ on the Celsius scale
b. 40K corresponds to −40◦ C
c. Temperatures which differ by 10◦ on the Celsius
scale must differ by 18◦ on the Fahrenheit scale
d. Water at 90◦ C is warmer than water at 202◦ F

Answer 4

c

Question 5

Beta particles are electrons or positrons
emitted from a nucleus during beta decay.
These particles travel at a speed of
_________ of the speed of light.
a. 9/10
b. 1/20
c. 1/10
d. 3/5

Question 6

Nuclear sizes are expressed in a unit
named
a. Fermi c. Newton
b. Angstrom d. Tesla

Answer 6

a

Question 7

Lightyear is a unit of
a. time c. light
b. distance d. intensity of light

Answer 7

b

Question 8

Mirage is due to
a. unequal heating of different parts of
atmosphere
b. magnetic disturbances in the atmosphere
c. depletion of ozone layer in the
atmosphere
d. equal heating of different parts of the
atmosphere

Answer 8

a

Question 9

Stars appears to move from east to
west because
a. all stars move from east to west
b. the earth rotates from west to east
c. the earth rotates from east to west
d. the background of the stars moves from
west to east

Answer 9

b

Question 10

f two bodies of different masses,
initially at rest, are acted upon by the same
force for the same time, then both bodies
acquire the same

Question 11

Out of the following, which is not
emitted by radioactive substances?
a. electrons
b. electromagnetic radiations
c. alpha particles
d. neutrons

Answer 11

d

Question 12

Sound waves in air are
a. transverse c. electromagnetic
b. longitudinal d. polarized

Question 13

Materials for a rain-proof coats and
tents owe their water-proof properties to
a. surface tension c. specific gravity
b. viscosity d. elasticity

Answer 13

a

Question 14

It takes much longer to cook food in the
hills than in the plains, because
a. in the hills the atmospheric pressure is
lower than that in the plains and therefore
water boils at a temperature lower than 100
deg C causing an increase in cooking time
b. due to a lower pressure on the hills, the
water boils at a temperature higher than
100 deg C and therefore water takes longer
to boil
c. in the hills the atmospheric density is low
and therefore a lot of heat is lost to the
atmosphere
d. in the hills the humidity is high and
therefore a lot of heat is absorbed by the
atmosphere leaving very little heat for
cooking

Answer 14

a

Question 15

Intensity of sound at a point is
_____________ its distance from the source
a. directly proportional to
b. inversely proportional to
c. directly proportional to square of
d. inversely proportional to square of

Question 16

Of the four locations mentioned below
the highest inside temperature will be
attained in the pressure cooker operated
with the pressure valve open.
a. at sea level
b. at the top of Mt. Everest
c. at a place below sea level
d. in an aeroplane flying at a height of 10km
with inside pressure maintained at the sea
level

Answer 16

c

Question 17

Mercury is commonly used as a
thermodynamic fluid rather than water
because
a. specific heat of mercury is less than water
b. specific heat of mercury is more than
water
c. mercury has greater visibility than water
d. density of mercury is more than the water

Answer 17

c

Question 18

The study of motion without reference to the forces which
causes motion known as:
a. kinetics c. statics
b. dynamics d. kinematics

Answer 18

d

Question 19

A branch of physical science that deals with state of rest or
motion of bodies under the action of forces is known as:
a. mechanics c. kinematics
b. kinetics d. statics

Question 20

The momentum of a moving object is the product of its mass (M)
and velocity (v). Newton’s second law of motion says that the rate of
change of momentum with respect to time is:
a. power c. momentum
b. energy d. force

Question 21

Conventional flow assumes chargers flow from
a. positive to negative c. negative to positive
b. positive to zero d. negative to zero