List of top Physics Questions asked in MHT CET

Two thin lenses have a combined power of +9D. When they are separated by a distance of 20 cm, then their equivalent power becomes +27/5 D. Their individual power (in dioptre) is

In a p-type semiconductor

A diffraction pattern is obtained by making blue light incident on a narrow slit. If blue light is replaced by red light then

In metre bridge experiment, null point is obtained at 20 cm from left end of the wire, when resistance X is balanced against another resistance Y (X < Y). To balance a resistance 4 X against Y, the new position of the null point from the same end will be

What is intensive property?

A light wave of wavelength ‘λ’ is incident on a slit of width ‘d’. The resulting diffraction pattern is observed on a screen at a distance ‘D’.If linear width of the principal maximum is equal to the width of the slit, then the distance D is

What is change in internal energy if a system gains xJ of heat and yJ work is done on it?

Air column in two identical tubes is vibrating. Tube A has one end closed and tube B has both ends open. Neglecting end correction, the ratio of the fundamental frequency of air column in tube A to that in tube B is

Consider the following statements about interference of light. 
A – When crest of one wave coincides with crest of another wave at a point, this point is a point of destructive interference. 
B – Two coherent sources emit wave of same frequency with constant phase difference.
Choose the correct option from the following.

Find resistance in a delta shape terminal.

A string is vibrating in its fifth overtone between two rigid supports 2.4 m apart. The distance between successive node and antinode is

Three isolated metal spheres A, B, C have radius R, 2R, 3R respectively, and same charge Q. U_A, U_B and U_C be the energy density just outside the surface of the spheres. The relation between U_A, U_B and U_C is

Two long parallel wires separated by distance ‘d’ carry currents I₁ and I₂ in the same direction. They exert a force F on each other. Now the current in one of the wire is increased to three times and its direction is made opposite. The distance between the wires is doubled. The magnitude of force between them is

A condenser of capacity ‘C’ is charged to a potential difference of ‘V₁’. The plates of the condenser are then connected to an ideal inductor of inductance ‘L’. The current through an inductor when the potential difference across the condenser reduces to ‘V₂’ is

The coefficient of linear expansion of brass and steel rod are ‘α₁’ and ‘α₂’ respectively. Lengths of brass and steel rods are ‘l₁’ and‘l₂’ respectively. If (l₂ - l₁) is maintained same at all temperatures, which one of the following relation is correct?

An electron jumps from the 4^th orbit to the 2^nd orbit of hydrogen atom. Given the Rydberg’s constant R = 10⁷ m-1. The frequency in Hz of the emitted radiation is (c = 3x10⁸ m/s)

A van is moving with a speed of 108 km/hr on a level road where the coefficient of friction between the tyres and the road is 0.5. For the safe driving of the van, the minimum radius of curvature of the road shall be (Acceleration due to gravity, g=10 m/s²)

The maximum speed of a particle in S.H.M. is V. The average speed is

A galvanometer of resistance G has voltage range V_g. Resistance required to convert it to read voltage up to V is