SRMJEE Mock Test (Med) - 4 - JEE MCQ

A body is moving in a circular path with a constant speed. It has

In an inelastic collision between two bodies, the physical quantity that is conserved

The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be

The ratio of the lengths of two wires A and B of same material is 1:2 and the ratio of their diameter is 2:1. They are stretched by the same force, then the ratio of increase in length will be

Photons of energy 6eV are incident on a metal surface whose work function is 4eV. The minimum kinetic energy of the emitted photoelectrons will be

Consider the following statement for a bridge type rectifier
1. Centre tap is not required for the secondary of the transformer.
2. The output will be half wave rectification if one of the diodes of the bridge circuit gets open circuited.
3. The bridge requires four diodes
4. If one of the diodes gets short circuited, the transformer will be short circuited.
Which of the above statements are correct?

Two electric charge 12 μ C and − 6 μ C are places 20 cm apart in air. There will be a point P at which electric potential is zero on the line joining these two charges and outside, excluding the region between them. The distance of P from − 6 μ C charge is

On the horizontal surface of a truck (μ=0.6), a block of mass 1 kg is placed.If the truck is accelerating at the rate of 5 m/sec² then frictional force on the block will be

The mass of the moon is about 1.2% of the mass of the earth. Compared to the gravitational force the earth exerts on the moon, the gravitational force the moon exerts on earth

The maximum wavelength of radiation emitted at 2000 K is 4 μm. What will be the maximum wavelength of radiation emitted at 2400 K?

If pressure of a gas contained in a closed vessel is increased by 0.4% when heated by 1^oC, the initial temperture must be

A lift is moving down with an acceleration a. A man in the drops a ball inside the lift. The acceleration of the ball as observed by the man in the lift, and a man standing stationary on the ground are respectively

The coil of a moving coil galvanometer is wound over a metal frame in order to

The domain formation is a necessary feature of

The change in surface energy, when a drop of surface tension T and radius of R splits into 1000 droplets of radius r, is

A car accelerated from initial position and then returned at initial point, then

The general motion in three dimensions may be

A person of 70kg mass is lifted by a helicopter with the help of rope hanging from it. If the helicopter is rising with an acceleration of 4 ms^-2, the tension in the rope is (g=10 ms^-2)

The force constant of two springs are k₁ and k₂ respectively. Both are stretched till their potential energies are equal. The forces f₁ and f₂ applied on them are in the ratio

A ball is projected upwards from the top of tower with a velocity 50 ms^-1 making an angle 30^owith 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?

In a streamline flows if the gravitational head is h. The kinetic and pressure heads are

While viewing a distant object with a telescope, suddenly a housefly sits on objective lens. The correct statement is that

The moment of Inertia of a solid cylinder of mass M and radius R about a line parallel to the axis of the cylinder but lying on the surface of the cylinder is

The density of a cube is measured by measuring its mass and length of its sides. If the maximum error in the measurement of mass and length are 4% and 3% respectively, then the maximum error in the measurement of density would be

Small droplets of a liquid are usually more spherical in shape than larger drops of the same liquid because

If the cold junction of thermocouple is lowered, then the neutral temperature

A vessel is filled with an ideal gas at a pressure of 20 atm and is at a temperature of 27 ^oC . One half of the mass is removed from the vessel and the temperature of the remaining gas is increased to 87 ^oC . At this temperature the pressure of the gas will be ...