List of top Physics Questions asked in MHT CET

Two perfect gases at absolute temperatures $T_1$ and $ T_2$ are mixed. There is no loss of energy. The temperature of mixture of masses of molecules are $ m_1$ and $ m_2$ and the number of molecules in the gases are $n_1 $ and $ n_2 $ respectively, is

The displacement of a particle performing simple harmonic motion is given by, x=8sin$\omega t+6cos \omega t$, where distance is in cm and time is in second. The amplitude of motion is

The minimum phase difference between two simple harmonic oscillations, $ \, \, \, \, \, \, \, \, y_1 =\frac{1}{2}sin \omega t +\frac{\sqrt 3}{2} cos \omega t$ $ \, \, \, \, \, \, \, \, \, \, \, y_2 =sin \omega t +cos \omega t$ is

Two light rays having the same wavelength $\lambda$ in vacuum are in phase initially. Then the first ray travels a path $L_1$ through a medium of refractive index $n_1$ while the second ray travels a path of length $L_2$ through a medium of refractive index $n_2$. The two waves are then combined to produce interference. The phase difference between the two waves is

Turning effect is produced by

A thick wire is stretched, so that its length become two times. Assuming that there is no change in its density, then what is the ratio of change in resistance of wire to the initial resistance of wire?

In Melde's experiment, the string vibrates in 4 loops when a 50 g weight is placed in the pan of weight 15 g. To make the strings to vibrates in 6iJoops the weight that has to be removed from the pan is

The time period of a particle in simple harmonic motion is 8 second. At t = 0 it is at the mean position. The ratio of the distances travelled by it in the first and second seconds is:

A galvanometer of 100 $ \Omega $ resistance gives full scale deflection with 0.01 A current. How much resistance should be connected to convert it into an ammeter of range , 10 A :

A transformer is used to light a

100 W

and

110 V

lamp from

220 V

mains. If the main current is

0.5

amp, the efficiency of the transformer is approximately:

When the temperature exceeds the transition temperature, a ferromagnetic material becomes similar to:

The nucleus of which of the following atoms whose atomic mass numbers '

A

' are given in the options would have the highest binding energy per nucleon?

A spherical balloon of radius

a

is charged. The energy density in the electric field at point

P

shown in the figure given below is

W

. If the balloon is inflated to a radius

b

without altering its charge, what is the energy density at

P

?

Two similar waves '

x

' and '

y

' of amplitude 'a' are moving in the same direction and superimposed. If the wave '

y

' is lagging behind the wave '

x

' by one-fourth of the cycle, then the amplitude of the resultant wave is equal to:

In the circuit shown in the figure, the input voltage

V_{i}

is

20 V, V_{B E} = 0

and

V_{C E} = 0

. The values of

I_{B}, I_{C}

and

β

are given by:

On giving 220 V to a resistor the power dissipated is 40 watt, then the value of resistance is:

A tank is filled with water of density

1 \frac{g}{{c m}^{3}}

and oil of density

0.9 \frac{g}{{c m}^{3}}

. The height of water layer is

100 c m

and that of oil layer is 400

c m

. If

g = 980 \frac{c m}{s^{2}}

, then the velocity of efflux from an opening in the bottom of the tank will be-

A

240 V, 60 H z

voltage source is connected to resistor of

60 Ω

. Find the value of net power consumed by resistance over a complete cycle.

Water is flowing through a horizontal pipe in stream line flow at the narrowest part of the pipe?

The height from earth's surface at which acceleration due to gravity becomes g/ where g is acceleration due to gravity on the surface of earth and R is radius of earth?

Two spheres are given that r = 10 cm and distance between them is 20 cm and axis is passing between the middle of the distance. What is the moment of inertia?

A thermodynamic system is taken through the cycle

A B C D

as shown in the figure. Heat rejected by the gas during the cycle is: