NEET Mock Test - 26 - NEET MCQ

A proton and an α - particle enter into a region of uniform electric field. The ratio of the force on proton to that on α - particle is

Three identical cells each of e.m.f. 2 V and unknown internal resistances are connected in parallel. This combination is connected to a 5 Ω resistor. If the terminal voltage across the cell is 1.5 V, then internal resistance of each cell is

The work functions for sodium and copper are 2 eV and 4 eV. Which of them is suitable for a photocell with 4000Å light

If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a

If the equation for the displacement of a particle moving on a circular path is given by (θ) = 2t³ + 0.5, where θ is in radians and t in seconds, then the angular velocity of the particle after 2 sec from its start is

The energy of a photon of wavelength λ is given

A metal plate gets heated, when cathode rays against it, due to

Mixed He⁺ and o²⁺ ions (mass of He⁺ = 4 amu and that of o²⁺= 16 amu) beam passes a region of constant perpendicualr magnetic field. If kinetic energy of all the ions is same then

An inductance L having a resistance R is connected to an alternating source of angular frequency ω. The quality factor (Q) of the inductance is L/R

The difference between soft and hard X-rays is

Which scientist experimentally proved the existance of electromagnetic waves?

If 4 x 10²⁰ eV of energy is required to move a charge of 0 . 25 coluomb between two points, the p.d between them is

If the charge on a body is increased by 2C, the energy stored in it increased by 21%.The original charge on the body in coulombs is

The angular velocity of rotation of star at which the matter strat to escape from its equator will be

The radiant energy from the sun incident normally at the surface of earth is 20 kcal/m² min. What would have been the radiant energy incident normally on the earth, if the sun had a temperature twice of the present one

Consider a gas with density ρ and c̅ as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity υ, then the pressure exerted by the gas is

A shell of mass m moving with velocity ν suddenly breaks into 2 pieces. The part having mass m/4 remains stationary. The velocity of the other part will be

A current carrying straight wire is kept along the axis of a circular loop carrying a current. The straight wire

For protecting sensitive equipment from external magnetic field, it should be

A bar magnet used in vibration magnetometer is heated so as to reduce its magnetic moment by 36%. The time period of the magnet [Neglecting the changes in the dimensions of the magnet ]

The shape of a liquid drop becomes spherical due to its

A cube is subjected to a uniform volumatric compression. If side of cube decreases by 1%, then its bulk strain is

In carbon cycle of fusion

A radioactive isotope has a half-life of 2 years. How long will it take the activity to reduce to 3% of its original value?

A radioactive sample at any instant has its disintegration rate 5000 disintegrations per minute. After 5 min, the rate is 1250 disintegrations per min. Then, the decay constant (per minute) is

Period of oscillation of mass attached to a spring and performing SHM is T. The spring is now cut into four equal pieces and the same mass attached to one piece. Now the period of its simple harmonic oscillation is

The equivalent focal length of a Huygen's eye piece