SRMJEE Practice Test (Med) - 9 - JEE MCQ

A particle of mass m is suspended from a fixed point C by a light string of length a. The particle is projected at right angle to the string with a velocity with which it describes a complete circle is—

A bullet of mass X moves with a velocity Y, hits a wooden block of mass Z at rest and gets embedded in it. After collision the wooden block with bullet moves with a velocity

The X-ray tube is operated at 50 kV. The minimum wavelength produced is

A wire has resistance 12 Ω. It is bent in the form of a circle. The effective resistance between the two points on any diameter is equal to

Which of the following quantities has no dimensions

A gate with only one input and one output is

If a positive charge is shifted from a low potential region to a high potential region, then the electric potential energy of the system

A body of mass 5 kg rests on a rough horizontal surface of coefficient of friction 0.2. The body is pulled through a distance of 10m by a horizontal force of 25 N. The kinetic energy acquired by it is (g=10 ms²)

A satellite is orbiting a planet at a certain height in circular orbit. If the mass of the planet is suddenly reduced to half, the satellite would

Newton's law of cooling holds good only, if the temperature difference between the body and its surrounding is

The relationship between pressure and the density of a gas expressed by Boyle's law, P = KD holds true

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

The property utilized in the manufacture of lead shots is

When a magnetic substance is heated, then

A current of 10 ampere is flowing in a wire of length 1.5 metre. A force of 15 newtons acts on it when it is placed in a uniform magnetic field of 2 telsa. The angle between the magnetic field and the direction of the current is

Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity V and B, thrown downwards with velocity V, then

A vehicle of 100 kg is moving with a velocity of 5 m/sec. To stop it in 1/10 sec, the required force in opposite direction is

An aeroplane moving horizontally with a speed of 720 km/h drops a food pocket, while flying at a height of 396.9 m. the time taken by a food pocket to reach the ground and its horizontal range is (Take g = 9.8 m/sec²)

One of the two clocks on the earth is controlled by a pendulum and other by a spring. If both the clocks are taken to the moon, then which clock will have same time period as that on the earth?

A ball is projected upwards from the top of tower with a velocity 50 ms^-1 making an angle 30^o with the horizontal. The height of the tower is 70 m. After how many seconds from the instant of throwing will the ball reach the ground?

Two different objects are projected with the same speed but at different angles θ₁ and θ₂ respectively with the horizontal. If θ₁ = 30^o and θ₂ = 60^o, then the ratio of the ranges R₁ and R₂ of the two objects:

A spherical air bubble is embedded in a piece of glass. For a light ray passing through it, it behaves like a

Three rods each of length L and mass M are placed along X,Y and Z axes in such a way that one end of each rod is at the origin. The moment of inertia of the system about Z-axis is

Consider the following statements about dimensions
P:Force=acceleration due to gravity x mass
Q:Electric charge=current x time
R:Magnetic flux=Electric voltage x time
The correct statements are :

If a glass rod is dipped in mercury and withdrawn out, the mercury does not wet the rod because

A heater draws a current of 2 A when connected to a 250 V source. The rate of energy dissipation is

The variation of density of a solid with temperature is given by the formula