List of top Physics Questions asked in MHT CET

To manufacture a solenoid of length ' \( l \) ' and inductance ' \( L \) ', the length of the thin wire required is (cross - sectional diameter of a solenoid is considerably less than length, \( \mu_0 = \) permeability of free space)
A spring has length ' \( L \) ' and force constant ' \( K \) '. It is cut into two springs of length ' \( L_1 \) ' and ' \( L_2 \) ' such that \( L_1 = nL_2 \) (n is an integer). The force constant of the spring of length ' \( L_2 \) ' is
A soap bubble of radius \( R \) is surrounded by another soap bubble of radius \( 2R \) as shown in figure. The excess pressure inside the smaller soap bubble will be (\( T \) = surface tension of soap solution)

The period of revolution of planet A around the sun is 8 times that of \( B \). The distance of \( A \) from the sun is how many times greater than that of \( B \) from the sun?
A plane wavefront of width ' \( x \) ' is incident on an air-water interface and the corresponding refracted wavefront has a width ' \( y \) ' as shown in figure. The refractive index of air with respect to water in terms of distances ' \( w \) ' and ' \( z \) ' is (AD = w, CB = z)

A blackbody at \( 1227^\circ\text{C} \) emits radiation with maximum intensity at a wavelength of \( 5600\,\text{\AA} \). If the temperature of the body is increased by \( 1000^\circ\text{C} \), the maximum intensity will be at wavelength
A resistor of \( 400\,\Omega \) and an inductance of \( 0.4\,\text{H} \) are in series with an a.c. source of e.m.f. \( E = 200\sqrt{2}\sin(1000t) \). The power factor of the circuit is
The third overtone of a closed pipe of length ' \( L_c \) ' has the same frequency as the third overtone of an open pipe of length ' \( L_o \) '. The ratio ' \( L_c \) ' : ' \( L_o \) ' is equal to (Neglecting end correction)
A solid sphere and a ring have equal mass and equal radius of gyration. If sphere is rotating about its diameter and ring about an axis passing through centre and perpendicular to its plane, then the ratio of radius of sphere to that of ring is \( \sqrt{\frac{x}{2}} \) then the value of ' x ' is
The intermediate image formed by an objective lens of a compound microscope is
The centre of mass of a system of particles does NOT depend on
Which of the following is NOT an example of diamagnetic substance?
A wheel of diameter 20 cm is rotating at 600 rpm. The linear velocity of a particle at its rim is:
The potential energy of a particle performing linear S.H.M is \( 0.1 \pi^2 x^2 \) joules. If the mass of the particle is \( 20 \, \mathrm{g} \), find the frequency of S.H.M:
In a meter bridge experiment, a resistance of \( 10 \, \Omega \) is balanced by a resistance \( X \) with a balance point at \( 40 \, \mathrm{cm} \). What is the value of \( X \)?

The logic performed by the circuit shown in the figure is equivalent to: 

Which of the following is ferromagnetic:
A rocket of initial mass 6000 kg ejects gases at a constant rate of 16 kg/s with a constant relative speed of 11 km/s. What is the acceleration of the rocket one minute after the blast?
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon:
What is the magnetic field produced inside a solenoid?
What is the output of a NAND gate when both inputs are HIGH?
A light-emitting diode (LED) is fabricated using GaAs semiconductor material whose band gap is \( 1.42 \, \text{eV} \). The wavelength of light emitted from the LED is:
If the half-life of the sample is 5 years and the initial weight of the sample is 64 gm, then the weight remaining after 15 years is:
A wire of length \( 1 \, \text{m} \) moving with velocity \( 8 \, \text{m/s} \) at right angles to a magnetic field of \( 2 \, \text{T} \). The magnitude of induced emf between the ends of the wire will be:
Relative permittivity and permeability of a material are \( \varepsilon_r \) and \( \mu_r \), respectively. Which of the following values of these quantities are allowed for a diamagnetic material?