Question # 1

If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy

Choose an answer

0 J

2 J

5 J

10 J

In the reverse process, the working substance passes through the same stages as in the direct process and

Choose an answer

thermal effects at each stage are exactly reversed

mechanical effects at each stage are exactly reversed

thermal and mechanical effects at each stage remain the same

thermal and mechanical effects at each stage are exactly reversed

When quarter of a circle is completed, phase of vibration is:

Choose an answer

90°

180°

45°

360°

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Choose an answer

transformer

rectifier

filter

none of these

Fog droplets are suspended in air when their weight is balanced by:

Choose an answer

Force of gravity

Upward trust due to air

Surface tension

None of these

The ratio of velocity of sound in air at 4 atm pressure and that at 1 atm pressure would be

Choose an answer

1 : 2

4 : 1

1 : 4

2 : 1

Mass of proton is of order of

Choose an answer

10^-31gm

10^-27kg

10^-24gm

10⁺²⁷kg

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Choose an answer

I_cwill decrease

V_CEwill increase

I_Cwill increase

V_CCwill increase

The unit of decay constant is

Choose an answer

sex

sec²

sec^-1

sec^-2

Rate of diffusion is

Choose an answer

Faster in solids than in liquids and gases

Faster in liquids than in solids and gases

Equal to solids, liquids and gases

Faster in gases than in liquids and solids

In the formula R = N x m for diffraction grating, N denotes:

Choose an answer

No. of lines/cm

No. of lines/meter

Total number of lines

None of above

A current which demagnetize the material completely is called

Choose an answer

Applied current

Coercive current

Maximum current

None of these

Wavelength of light of frequency 100 Hz is

Choose an answer

2 x 10⁶m

3 x 10⁶m

4 x 10⁶m

5 x 10⁶m

In everyday life, when two balls collide then after collision, they the velocities as before the

Choose an answer

greater than the velocities as before the impact

equal to the velocities as before the impact

less than the velocities as before the impact

none of them

A typical rocket ejects the burnt gases at speeds over

Choose an answer

400 ms^-1

40000 ms^-1

40000m s^-1

60000 ms^-1

Strain is defined in terms of:

Choose an answer

Formation

Deformation

Area

Newtons

None of these

The acceleration of a motor car is 8 m/s².If the diameter of its wheel be 2 metre,its angular acceleration will be

Choose an answer

8 m/s²

8 radian /s²

16 m/s²

16 radian/s²

Fluids resist force this property is called

Choose an answer

Stiffness

Strength

Ductility

Elasticity

Two bodies of masses m₁ and m₂ have equal momentum their kinetic energies E₁ and E₂ are in the ratio

Choose an answer

√m₁ : √m₂

m₁ : m₂

m₂ : m₁

m²₁ : m²₂

For interference to occur the two light waves should be:

Choose an answer

Of two different frequencies

Coming from opposite directions

Of high intensity

Monochromatic

When 400.1 is added to 20.54 we get

Choose an answer

420

420.65

420.1

420.6

In case of interference fringes:

Choose an answer

Energy is destroyed at dark

Energy is created at bright fringes

Energy is transferred from dark to bright ringes

None of these

More Classes

Other Links

Physics General Science Test Medium Mode MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer