List of top Physics Questions asked in MHT CET

In Young's double slit experiment, the distance between the slits is 2 mm and the slits are 1 m away from the screen. Two interference patterns can be obtained on the screen due to light of wavelength '$\lambda_1$' and '$\lambda_2$' respectively. The separation on the screen between the 3rd order bright fringes on the two interference patterns is ($\lambda_2 = 1.5\lambda_1$) ______.

The potentiometer wire is 5 m long and potential difference of 4 V is maintained between the ends. The e.m.f. of the cell which balances against a length of 200 cm of the potentiometer wire is ______.

A bar of iron having magnetic moment 2.4 Am$^2$ weighs 66 g. If the density of the material of the bar is 7700 kg/m$^3$, the intensity of magnetisation in Am$^{-1}$ is ______.

In Paschen series, wavelength of first line is '$\lambda_1$' and for Brackett series, wavelength of first line is '$\lambda_2$' then ratio $\frac{\lambda_1}{\lambda_2}$ is ______.

A body weighs 45 N on the surface of the earth. The gravitational force on a body due to earth at a height equal to half the radius of earth will be ______.

An air column is of length 17 cm. The ratio of frequencies of 5th overtone if the air column is closed at one end to that open at both ends is (velocity of sound in air = 340 ms$^{-1}$) ______.

Moment of inertia of the rod about an axis passing through the centre and perpendicular to its length is '$I_1$'. The same rod is bent into a ring and its moment of inertia about the diameter is '$I_2$'. Then $I_1/I_2$ is ______.

A sphere of mass 'm', moving with velocity '3u' collides head-on with another identical sphere at rest. If 'e' is coefficient of restitution then what will be the ratio of velocity of the second sphere to that of first sphere after collision?

A magnetic field $4 \times 10^{-2}$ T acts at right angles to a coil of area $100$ cm$^2$ with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in time 't'. The value of 't' is ______.

In Sonometer experiment, the frequency of a tuning fork used is 288 Hz. Harmonics will 'NOT' be produced at the frequency ______.

In series LCR circuit C = 2$\mu$F, L = 5mH and R = 5$\Omega$. The ratio of energy stored in the inductor to that in capacitor, when maximum current flows through the circuit is ______.

The ratio of energies of photons produced due to transition of electron of hydrogen atom from its (i) third to 2nd energy level and (ii) highest energy level to 3rd level is ______.

A boy throws a ball vertically upwards from a bridge with velocity 5 m/s. It strikes water surface after 2 s. The height of the bridge is (Take g = 10 m/s$^2$) ______.

Kirchhoff's voltage law and current law are based (respectively) on the conservation of

Quantities p, q, r, s are measured with errors 3%, 2%, 3% and 1%. $A = \frac{pq^{2}{r^{3}s}$. The percentage error in A is}

Closed and open organ pipes have same length. In first overtone, they produce four beats. If open pipe length is halved and closed pipe doubled, the beats in fundamental mode are

A man on a turn-table folds his arms. If his moment of inertia with folded arms is 75% of original, his rotational kinetic energy will

In thermodynamic processes, which of the following statements is NOT true?

In series LCR circuit $R=18\Omega$ and $Z=30\Omega$. An rms voltage 210 V is applied. The true power consumed is nearly

A mass 'M' attached to a horizontal spring executes S.H.M. of amplitude $A_{1}$. When the mass M passes through its mean position, a smaller mass 'm' is placed over it and both move together with amplitude $A_{2}$. The ratio $(A_{1}/A_{2})$ is}

The function of a dielectric in a capacitor is

A radioactive element has rate of 8000 disintegrations per minute. After four minutes it becomes 2000 disintegrations per minute. The decay constant per minute is

The graph shows the variation of photocurrent with anode potential for four different radiations. If $I$ denotes intensity and $f$ denotes frequency, which of the following is correct?

A car moving at a speed 'V' is stopped in a certain distance with deceleration 'a'. If the speed of the car is 'nV', what must be the deceleration of the car to stop it in the same distance and in the same time?

A black sphere has radius R whose rate of radiation is E at temperature T. If radius is made $R/2$ and temperature $3T$, the rate of radiation will be