Physics Test 118

Result

Physics Test 118

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

A wheel whose moment of inertia is12 kgm² has an initial angular velocity of 40 rad/s. A constant torque of 20 NM acts on the wheel. The time in which the wheel is accelerated to 100 rad/s is

A
64 sec

B
16 sec

C
8 sec

D
36 sec
Question 2
4 / -1

The M.I. of a solid sphere of mass M and radius R about an axis at a distance 2R from centre is

A

B

C

D
Question 3
4 / -1

A reversible engine Converts one-sixth of the heat input into work. When the temperature of the sink is reduced by the efficiency of the engine is doubled. The temperature of source and sink are

A

B

C

D
Question 4
4 / -1

Two liquids A and B are 32^oC and 24^oC. When mixed in equal masses the temperature of the mixture is found to be 28^oC. Their specific heats are in the ratio of

A
3 : 2

B
2 : 3

C
1 : 1

D
4 : 3
Question 5
4 / -1

Which of the following is not a postulate of kinetic theory of gases ?

A
All gases are composed of molecules. Molecules of one gas are different from that of others

B
The molecules are mere point masses

C
The molecules are not always in motion

D
The molecules are perfectly elastic spheres
Question 6
4 / -1

Certain perfect gas is found to obey PV^3/2 = constant during an adiabatic process. If such a gas at initial temperature T is adiabatically compressed to half the initial volume, its final temperature will be

A
√2 T

B
2 T

C
2√2 T

D
4 T
Question 7
4 / -1

The first law of thermodynamics is concerned with the conservation of

A
number of molecules

B
energy

C
number of moles

D
temperature

Solution

1st law concerned with heat energy bcoz energy neither be created nor be destroyed so it's only true with energy.
Question 8
4 / -1

For hydrogen the temperature and volume are related to each other according to the relation When the gas undergoes an adiabatic process and changes from thermodynamic state 1 to 2, the value of x is

A
0.3

B
0.4

C
0.5

D
0.6
Question 9
4 / -1

The colour of a star is an indication of its

A
weight

B
distance

C
temperature

D
size
Question 10
4 / -1

A given mass of a gas expands from the state A to the state B by three paths 1, 2 and 3 as shown in the figure.

If W₁, W₂ and W₃ respectively be the work done by the gas along the three paths then

A

B

C

D