MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions

A particle of charge 'q' and mass 'm' moves in a circular orbit of radius 'r' with angular speed `omega`. The ratio of the magnitude of its magnetic moment to that of its angular momentum is ____________.

The magnetic moment produced in a sample of 2 gram is 8 x 10^-7 A/m². lf its density is 4g/cm³, then the magnetization of the sample is ____________.

A transverse wave is travelling with velocity 'V' through a metal wire of length 'L' and density 'ρ'. The tensile stress on the wire is ______

A uniform metal wire has length 'L', mass 'M', and density 'ρ'. It is under tension 'T' and 'v' is the speed of transverse wave along the wire. The area of cross-section A of the wire is ______ 

A plane wavefront is an incident on a water surface at an angle of incidence 60° then it gets refracted at 45°. The ratio of the width of incident wavefront to that of refracted wavefront will be ______ 

`[sin  pi/4 = cos  pi/4 = 1/sqrt2, sin60^circ = sqrt3/2, cos60^circ = 1/2]`

Two resistances prepared from the wire of the same material having diameters in the ratio 2 : 1 and lengths in the ratio 2 : 1 are connected in the left gap and right gap of Wheatstone's meter bridge respectively. The distance of the null point from the left end of the wire is ______ 

When the observer moves towards a stationary source with velocity V₁, the apparent frequency of emitted note is F₁. When observer moves away from the source with velocity V₁, the apparent frequency is F₂. If V is the velocity of sound in air and `"F"_1/"F"_2=2` then `"V"/"V"_1` is equal to ______.

In the meter bridge experiment, the null point is obtained at a distance of ℓ from the left end. The resistance in the left and right gaps are halved and then interchanged. The new position of the null point is at ______

In a balanced metre bridge, 5 Ω is connected in the left gap and R Ω in the right gap. When R Ω is shunted with equal resistance, the new balance point is at 1.6 I₁ where 'I₁' is the earlier balancing length. The value of 'I₁' is ______ 

In the meter bridge experiment, a null point was obtained at a distance of ℓ from the left end. The values of resistances in the left and right gaps are doubled and then interchanged. The new position of a null point is ______

In a meter bridge experiment, to minimize an error due to contact resistance, ______  

An electron is projected along the axis of circular conductor carrying current I. Electron will experience ____________.

The variation of intensity of magnetization (I) and applied magnetic field intensity (H) for three magnetic materials A, B, C are shown in the graph. The material A is ____________.

Find the intensity of magnetization of a magnet of moment 4 Am² which weighs 50 gram. (Density of the material of a magnet = 5000 kg/m³)

In a metre bridge experiment, the ratio of the left-gap resistance to right gap resistance is 2: 3. The balance point from the left is ______.

Magnetization of a sample is ______.

ln, a Wheatstone network, P = Q = R = 8 `Omega` and S is 10 `Omega`. The required resistance to be connected to S so that network is balanced is ______.

A bar magnet has length 3 cm, cross-sectional area 4 cm^2, and magnetic moment 6 Am². The intensity of magnetisation of bar magnet is ______.

A transverse wave of amplitude 0.05 m and frequency 250 Hz is travelling along a stretched string with a speed of 100 m/s. What would be the displacement of a particle at a distance 1.1 m origin after 0.02 second?

`[sin  pi/2=1,  cos  pi/2=0]`

Two parallel conducting wires of equal lengths placed distance 'd' apart carry currents 'I₁' and 'I₂' respectively in opposite directions. The resultant magnetic field at the midpoint of both the wires is ______.

(µ₀ = permeability of free space.)