NEET Mock Test - 12 - NEET MCQ

A particle carrying a charge 'e' is fired perpendicularly in to a uniform magnetic field of induction B with a momentum 'p'; then the radius of circular path is

An electron is travelling horizontally towards east. A magnetic field is vertically downward direction exerts a force on the electron in the direction of

When cells are connected in parallel, then

When connected across the terminals of a cell, a voltmeter measures 5V and a connected ammeter measures 10 A of current. A resistance of 2 ohms is connected across the terminals of the cell. The current flowing through this resistance will be

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/sec. A plump bob is suspended from the roof of the car by a light rigid rod of length 1.00 m. The angle made by the rod with track is

Which of the following is true for photon

Light of frequency v is incident on a certain photoelectric substance with threshold frequency v₀. The work function for the substance is

Cathode rays are similar to visible light rays in that

Mutual inductance of two coils can be increased by

What is the cause of "Green house effect"?

Radio wave diffract around building although light waves do not. The reason is that radio waves:

Sixty four identical drops each charged by q coulomb to potential V volt coalesce to form a single large drop. The charge and potential on the large drop are respectively

A charge Q is divided into two parts as q and (Q - q) so that for any given separation between q and (Q - q), the electrostatic interaction between q and (Q - q) is maximum. The ratio Q/q is

The ratio of energy required to raise a satellite to a height 'h' above the earth's surface to that required to put it into the orbit of radius R is

Consider the following statements
Assertion (A) : When temperature increases, the colour of a star shifts towards smaller wavelength, i.e., towards violet colour
Reason (R) : Red colour has maximum wavelength
Of these statements

The equation for an ideal gas is PV = RT, where V represents the volume of

The cyclotron frequency of an electron gyrating in a magnetic field of 1 T is

A light spring balance hangs from the hook of the other light spring balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is

Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earth's magnetic field with like poles together, 12 oscillations per minute are made but for unlike poles together only 4 oscillations per minute are executed. The ratio of their magnetic moments is

A vibration magnetometer is placed at South pole, then the time period will be

If two soap bubbles of different radii are connected by a tube, then

According to the Hooke's law, if stress is increased, then ratio of stress to strain

The first atomic reactor was constructed by

The reason for the continuous emission of energy by the sun is

A nuclear reactor has a power of 16 Kw. If the energy per fission is 200 MeV, the number of fissions per second is

The length of a spring is 'a' when a force of 4 N is appled on it. The length is β when 5 N force is applied. Then the length of spring when 9 N force is applied is

The resolving power of a telescope depends on