MHT - CET MCQ

The first line of Balmer series has wavelength 6563 A. What will be the wavelength of the first member of Lyman series?

How the linear velocity 'v' of an electron in the Bohr orbit is related to its quantum number 'n'?

In experiment of photoelectric effect, the stopping potential for incident yellow light of wavelength 5890 Å is 4 volt. If the yellow light is replaced by blue light of wavelength 4000 Å, the stopping potential is ____________.

An A.C. voltage source of variable angular frequency `omega` and fixed amplitude V connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When `omega` is increased, ______.

Out of the following graphs, which graph shows the correct relation (graphical representation) for LC parallel resonant circuit?

An A.C. generator produced an output voltage e = 170 sin 327t volt, where t is in seconds. The frequency of A.C. voltage is nearly ____________.

A circular coil carrying current 'I' has radius 'R' and magnetic field at the centre is 'B'. At what distance from the centre along the axis of the same coil, the magnetic field will be `"B"/64`?

Which of the following graphs shows the variation of magnetic field B, with distance for a long current carrying conductor?

To increase the range of voltmeter the series resistance should be ____________.

A galvanometer of resistance 100 Ω is connected to a battery of 2V, with a resistance of 1900 Ω in series. The deflection obtained is 30 divisions. To reduce this deflection by 10 divisions, the additional resistance required to be connected in series is ______

An ammeter has a resistance of G `Omega` and range of I ampere. The value of the resistance used in parallel to convert it into an ammeter of range nl amperes is ____________.

If the e.m.f of a cell is not constant in the metre bridge experiment, then the ____________.

Which among the following resistances can be determined by a metre bridge?

Two identical parallel plate air capacitors are connected in series to a battery of e.m.f. 'V'. If one of the capacitor is inserted in liquid of dielectric constant 'K', then potential difference of the other capacitor will become ______.

Select the CORRECT statement from the following.

If the monochromatic source in Young's double slit experiment is white light, then ____________.

A set of 56 tuning forks are arranged in series of increasing frequencies. If each fork gives 4 beats with preceding one and the frequency of the last is twice than than that of first, then frequency of the first fork is ____________.

In the sonometer experiment, the string of length 'L' under tension vibrates in the second overtone between the two bridges. The amplitude of vibration is maximum at ______

For stationary waves in the medium, ____________.

The kinetic energy of a particle performing S.H.M. is `1/n` times its potential energy. If the amplitude of S.H.M. is 'A', then the displacement of the particle will be ______

A cube of mass 'M' and side 'L' is fixed on the horizontal surface. The modulus of rigidity of the material of the cube is 'η'. A force is applied perpendicular to one of the side faces. When the force is removed, the cube executes small oscillations. The time period ______

S.I. Unit of emissive power of a body at a given temperature is ______.

The molecular weights of oxygen and hydrogen are 32 and 2 respectively. The root mean square velocities of oxygen and hydrogen at N.T.P. are in the ratio ______

A small metal ball of mass 'm' is dropped in a liquid contained in a vessel, attains a terminal velocity 'v'. If a metal ball of same material but of mass '8m' is dropped in same liquid then the terminal velocity will be ____________.

When a solid ball of volume V is released in a viscous liquid it experiences a viscous force F. If the solid ball of the same material of volume V/2 is released in the liquid then the viscous force will be (where `eta` = coefficient of viscosity) ____________.

In stream-line flow of liquid, the total energy of Liquid is constant at ____________.

The value of surface tension of a liquid at critical temperature ______.

Energy needed in breaking a drop of radius R into n drops each of radius r is given by ____________.

A force of 50N is applied to the smaller piston of a hydraulic press. If the diameters of the piston are in the ratio 5 : 1, the force on the larger piston is ______.

A thin wire of length 'L' and uniform linear mass density 'm' is bent into a circular loop. The moment of inertia of this loop about the tangential axis and in the plane of the coil is ______.

The angular momentum of electron in hydrogen atom is proportional to ____________.

A ferris wheel with radius 20 m makes 1 revolution in every 10 s. The force exerted by the passenger of weight 55 kg on the seat, when he is at the top of the ferris wheel, is ____________.

In a semiconductor diode, the barrier potential offers opposition to only ______.

The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become ____________.

The critical angle for a ray of light from glass to air is 'θ' and refractive index of glass with respect to air is 'n'. If a ray of light is incident from air to glass at an angle 'θ', then corresponding angle of refraction is ______.

Which of the following is not a property of light?

A railway engine whistling at a constant frequency moves with a constant speed aixi it goes past a stationary observer standing beside the railway track. Then the frequency of (n') of the sound heard by the observer with respect to time (t) can be best represented by which of the following curve?

Three-point masses, each of mass 'm' are kept at the comers of an equilateral triangle of side 'L'. The system rotates about the centre of the triangle without any change in the eparation of masses during rotation. The period of rotation is directly proportional to ______.`(cos30^circ=sin60^circ=sqrt3/2, cos60^circ=sin30^circ=1/2)`

Three blocks with masses m, 3m and 6m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 3 m? (g is the acceleration due to gravity)

A small sphere is attached to a cord and rotates in a vertical circle about a point O. If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at ____________.