MHT - CET MCQ

With the increase in principal quantum number, the energy difference between the two successive energy levels ____________.

Light of wavelength `lambda` strikes a photo-sensitive surface and electrons are ejected with kinetic energy E. If the kinetic energy is to be increased to 2E, the wavelength must be changed to `lambda'` where ____________.

The natural frequency of an LC circuit is 125 kHz. When the capacitor is totally filled with a dielectric material, the natural frequency decreases by 25 kHz. Dielectric constant of the material is nearly.

The frequency of the output signal becomes ____________ times by doubling the value of the capacitance in the LC oscillator circuit.

In LCR circuit the inductance is changed from L to 9L. For same resonant frequency the capacitance should be changed from C to ____________.

Faraday's law is the consequence of conservation of ______

A proton is projected with a uniform velocity 'v' along the axis of a current carrying solenoid, then ____________.

A uniform current is flowing along the length of an infinite, straight, thin, hollow cylinder of radius 'R'. The magnetic field 'B' produced at a perpendicular distance 'd' from the axis of the cylinder is plotted in a graph. Which of the following figures looks like the plot?

A length L of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is ______.

The direction of the magnetic field produced around a long straight conductor is given by ______

A galvanometer of resistance 30 `Omega` is connected to a battery of emf 2V with 1970 `Omega` resistance in series. A full scale deflection of 20 divisions is obtained in the galvanometer. To reduce the deflection to 10 divisions, the resistance in series required is ____________.

A potentiometer wire of length 100 cm and resistance 3 `Omega` is connected in series with resistance of 8 `Omega` and an accumulator of 4 volt whose internal resistance is 1 `Omega`.

The current through 1 `Omega` resistance in the following circuit is ______. 

A resistance of 5 `Omega` is connected in the left gap of a metre bridge and 15 `Omega` in the other gap. The position of the balancing point is ____________.

If the p. d. across a capacitor is increased from 10 V to 30 V, then the energy stored with the capacitor ____________.

When sunlight is scattered by atmospheric atoms and molecules, the amount of scattered light, of wavelength 440 nm, is 'I'. What amount of light of wavelength 660 nm will be scattered?

A diffraction is obtained by using a beam of yellow light. What will happen if the yellow light is replaced by the red light?

`phi "and" phi_2 (phi_1 > phi_2)` are the work functions of metals A and B. When light of same wavelength is incident on A and B, the fastest emitted electrons from A are ____________ those emitted from B.

In Young's double slit experiment the source is white light. One slit is covered with red filter and the other with blue filter. There shall be ____________.

A pipe open at both ends has a length of 1m. The air column in the pipe can not resonate for a frequency (Neglect end correction, speed of sound in air = 340 m/s)

A tuning fork with frequency 800 Hz produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonances are observed at lengths 9.75 cm, 31.25 cm and 52.75 cm. The speed of sound in air is, ____________.

The correct statement about stationary waves is that ______

The length of a seconds pendulum is 1m on the earth. If the mass and diameter of the planet is double than that of the earth, then the length of the second's pendulum on the planet will be ______

The frequency of oscillation of a particle of mass m suspended at the end of a vertical spring having a spring constant k is directly proportional to ____________.

The displacement of the particle executing linear S.H.M. is x = 0.25 Sill ( 11 l + 0.5) m. The period of S.H.M. is ______.

(`pi = 22/7` )

Which of the following substances (A, B and C) has the highest specific beat? 

From amongst the following curves, which one shows the variation of the velocity v with time t for a small-sized spherical body falling vertically in a long column of a viscous liquid.

A glass plate is partly dipped vertically in the mercury and the angle of contact is measured. If the plate is inclined, then the angle of contact will ____________.

The pressure at the bottom of a tank containing liquid does not depend upon the ______.

If the angular momentum of a body increases by 50%, then its kinetic energy of rotation increases by ______ (M.I. remains constant)

A stone is tied at the end of a rope of length 1 m and whirled in a vertical circle. The ratio of velocity at highest point to lowest point will be ______.

A light emitting diode is ______

Radius of a metal sphere is 4 cm. It is given a charge of 8 µC. The force acting on unit area of its surface is ____________.

As the position of an object (u) reflected from a concave mirror is varied, the position of the image (v) also varies. For the values of u from 0 to +`oo,` the graph between v versus u will be ______.

A light beam is incident at an angle twice the angle of refraction. The angle of refraction is ______.

To hear an echo, the total distance covered by sound from the point of generation to the reflecting surface and back should be atleast ____________.

What will be the work done, when one gram of ice at -10° C is converted into steam at 100°?

In the case of earth, mean radius is 'R', acceleration due to gravity on the surface is 'g', angular speed about its own axis is 'ω'. What will be the radius of the orbit of a geostationary satellite?