List of top Questions asked in MHT CET- 2020

In potentiometer experiment, for a given current, the balancing length for a cell is obtained at \( L \) cm. If the current through potentiometer wire is decreased, then the balancing length will

In non-uniform circular motion, the ratio of tangential acceleration to radial acceleration is \( (r = \) radius of circle, \( V = \) speed and \( \alpha = \) angular acceleration)

When light of wavelength \( \lambda \) is incident on a photosensitive surface, the stopping potential is \( V \). When light of wavelength \( 3\lambda \) is incident on the same surface, the stopping potential is \( \frac{V}{6} \). Threshold wavelength for the surface is

If \( f \) is the number of degrees of freedom of a molecule of a gas and ratio of molar specific heats of a gas, \( \gamma = 1 + \frac{2}{f} \) where \( \gamma = \frac{C_p}{C_v} \). The ratio of \( \gamma \) for monoatomic gas to \( \gamma \) for (rigid) diatomic gas is

A capacitor \( C_1 = 4 \, \mu F \) is connected in series with another capacitor \( C_2 = 1 \, \mu F \). The combination is connected across a d.c. source of 200 V. The ratio of potential across \( C_2 \) to that across \( C_1 \) is

In hydrogen atom, the product of the angular momentum and the linear momentum of the electron is proportional to \( (n = \) principal quantum number)

A wire of length \( L \), mass \( M \), density \( \rho \), radius \( R \) is stretched by a certain load. If \( r \) and \( \ell \) are the changes in radius and length respectively, then Poisson's ratio is

In a parallelogram shown below, \( a^2 + b^2 = ? \)

Find the intensity of magnetization of a magnet with moment \( 4 \, \text{Am}^2 \) which weighs 50 grams. (Density of the material of a magnet = 5000 kg/m\(^3\))

Two unknown resistances are connected in two gaps of a meter bridge. The null point is obtained at 40 cm from the left end. A 30 \(\Omega\) resistance is connected in series with the smaller of the two resistances, the null point shifts by 20 cm to the right end. The value of the smaller resistance is

A transistor is used as a common emitter amplifier with a load resistance of 2 k\(\Omega\). The input resistance is 150 \(\Omega\). Base current is changed by 20 \(\mu A\), which results in a change in collector current by 1.5 mA. The amplified voltage gain of the amplifier is

In photoelectric emission, the intensity of incident light is reduced then stopping potential

Two wires of the same length and material are used to form a square loop and a circular loop respectively. If the same current is passed through both loops, then the ratio of the magnetic moment of the square loop to that of the circular loop is

An ammeter is obtained by shunting an \( n \, \Omega \) galvanometer with \( n \, \Omega \) resistance. The additional shunt required to be connected across it to double the range is

Out of the following graphs, which graph shows the correct relation for an LC parallel resonant circuit?

A uniform rod of length \( 2L \) has constant mass per unit length \( m \). The moment of inertia of the rod about an axis passing through its center and perpendicular to its length is

Capacity of a parallel plate air condenser is 2 μF and voltage between the plates is changing at the rate of 3 V/s. The displacement current in the capacitor is

Earth is assumed to be a sphere of radius \( R \) and uniform density. The variation of acceleration due to gravity (g) according to the depth and the height (h) from the Earth's surface is shown correctly by the graph

The two waves are represented by \( Y_1 = 10^{-2} \sin \left[ 50t + \frac{x}{25} + 0.3 \right] \, \text{m} \) and \( Y_2 = 10^{-2} \cos \left[ 50t + \frac{x}{25} \right] \, \text{m} \), where \( x \) is in metre and time in second. The phase difference between the two waves is nearly

The focal length of the objective used in compound microscope and telescope is respectively

A sphere of mass \( M \) is attached to one end of a metal wire having length \( L \) and diameter \( D \). It is whirled in a vertical circle of radius \( R \) with angular velocity \( \omega \). When the sphere is at the lowest point of its path, the elongation of the wire is

A disc has mass \( M \) and radius \( R \). How much tangential force should be applied to the rim of the disc so as to rotate with angular velocity \( \omega \) in time \( t \)?

A particle moves along a circular path of radius \( r \) with uniform speed \( V \). The angle described by the particle in one second is