SRMJEE Practice Test (Engg) - 4 - JEE MCQ

A body of mass m moving with velocity ν collides head on with another body of mass 2 m which is initially at rest. The ratio of kinetic energy of coliding body before and after collision will be

Gases begin to conduct electricity at low pressure because

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

An electronic oscillator gives sustained oscillations when the feedback is

The number of turns in a secondary coil is twice the number of turns in primary. A leclanche cell of 1.5 is connected across the primary. The voltage across secondary is

K is the force constant of a spring. The work done in increasing its extension from l₁ to l₂ will be

When we touch the terminals of a high voltage capacitor, even after a high voltage has been cut off, then the capacitor has a tendency to

Which of the following statements is not true

If r represents the radius of the orbit of a satellite of mass m moving around a planet of mass M, the velocity of the satellite is given by

A thermos flask is polished well

A flask is filled with 13 gm of an ideal gas at 27ºC and its temperture is raised to 52ºC. The mass of the gas that has to be released to maintain the temperature of the gas in the flask at 52ºC and the pressure remaining the same is

A bullet of mass m and velocity V is fired into a block of mass M and sticks to it. The final velocity would be

A 100 Ω galvanometer gives full scale deflection at 10 m A. How much shunt is required to read 10 m A?

Two similar bar magnets of the same mass and dimensions freely suspended by threads in a horizontal plane are found to make 12 oscillations and 15 oscillations per minute. Then their magnetic moments are in the ratio of

A horizontal pipe line carries water in a streamline flow. At a point along the pipe where cross-sectional area is 10 cm², the velocity of water is 1 m-s⁻¹ and pressure is 2000 Pa. The pressure of water, at another point where cross-sectional area is 5 cm², is (Density of water = 1000 kg-m⁻³)

The acceleration a (in ms⁻² ) of a body, starting from rest varies with time t (in s) following the equation a = 3t + 4. The velocity of the body at time t = 2 s will be

A particle moves in a plane with a constant acceleration in a direction different from the initial velocity. The path of the particle is

A 3 kg ball strikes a heavy rigid wall with a speed of 10 m/s at an angle of 60º .It gets reflected with the same speed and angle as shown .If the ball is in contact with the wall for 0.20 s, what is the average force exerted on the ball by the wall ?

Time period of a simple pendulum measured inside a stationary lift is found to be T. If the lift starts accelerating upwards with an acceleration of g/3, then new time period of the pendulum will be

Galileo's experiment showed that if two bodies of unequal masses are dropped from the same height, the time required by them to reach the ground are equal. But if they are thrown vertically upwards with the same initial velocity, the ratio of the time required to reach the ground is equal to

What percent of length of wire will increase by applying a stress of 1 kg weight/mm² onit. Y = 1 × 10¹¹ Nm⁻² and 1 kg wt = 9.8 N

In which of the following case, man will not see image greater than himself ?

The unit of Planck's constant is

If the diameter of a capillary tube is doubled, then the height of the liquid that will rise is

A spherical shell has mass M and radius R. Moment of inertia about its diameter will be

The current inside a copper voltameter

The coefficient of real expansion of Hg is 0.18 x 10⁻³ ∕  ºC . If the density of Hg at 0ºC is 13.6 gm/c.c, its density at 200ºC will be ....