SRMJEE Mock Test (Engg) - 12 - JEE MCQ

If the memory chip size is 256 x 1 bits, what is the number of chips required to make up 1 Kbyte of memory?

A railway truck of mass 2x10 ⁴ Kg travelling at 0.5 ms^-1collides with another half of its mass moving in opposite direction with a velocity of 0.4ms^-1. If the trucks couple automatically on collision, their common velocity after collision is

A 6 V battery is connected to the terminals of a 3 m long wire of uniform thickness and of resistance 100 Ω. The potential difference between two points on the wire, separated by a distance of 50 cm will be

Which of the following electromagnetic waves has minimum frequency ?

A wire whose cross-sectional area is 2mm² is stretched by 0.1mm by a certain load. If a similar wire of triple the area of cross-section is stretched by the same load, the elongation of the second wire would be

If the no. of turns of a solenoid are doubled and its length is halved keeping the area of cross-section same, then ratio of initial and final self-inductances will be

A capacitor of 10 μF charged up to 250 volts is connected in parallel with another capacitor of 5 μF charged up to 100 volts. The common potential is

The horizontal acceleration that should be given to a smooth inclined plane of angle to keep an object stationary on the plane, relative to the inclined plane is

A body of mass m is taken to the bottom of a deep mine. Then

Consider a compound slab consisting of two different materials having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

A current passing through a circular coil of two turns produces a magnetic field B at its centre. The coil is then rewound so as to have four turns and the same current is passed through it. The magnetic field at its centre now is

One litre of helim gas at a pressure 76 cm of Hg and temperature 27°C is heated till its pressure and volume are doubled. The final temperature attained by the gas is

Earth's magnetic field always has a horizontal component except at

When two surfaces are coated with a lubricant, then they

Water is flowing over a fixed horizontal surface. If the velocity gradient at a distance 10 cm above the surface is 2 s⁻¹, then velocity of layer will be

A ball is dropped from top of a tower of 100m height. Simultaneously another ball was thrown upward from bottom of the tower with a speed of 50 m/s (g=10 m/s²). They will cross each other after

A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of 120° with the direction of flow of water. The speed of water in the stream is

The kinetic energy of a particle, executing simple harmonic motion is 16 J when it is in its mean position. If the amplitude of oscillations is 25 cm and the mass of the particles is 5.12 kg, the time period of its oscillation is

Small liquid drops assume spherical shape because

A parachutist of weight 'w' strikes the ground with his legs fixed and comes to rest with an upward acceleration of magnitude 3 g. Force exerted on him by ground during landing is

A ball is projected with kinetic energy E at an angle of 45° to the horizontal. At the highest point during its flight, its kinetic energy will be

A ray of monochromatic light is incident on one refracting face of a prism of angle 75°. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the material of the Prism is 2 , the angle of incidence on the first face of the prism is

The moment of inertia of a uniform circular disc of radius 'R' and mass 'M' about an axis passing from the edge of the disc and normal to the disc is

If the error in the measurement of radius of a sphere is 0.1%, then the error in the measurement of volume will be

Due to which property of water tiny particles of camphor dance on the surface of water

"Heat can not by itself flow from a body at lower temperature to a body at higher temperature" is a statement or consequence of

The Peltier effect is