SRMJEE Mock Test (Engg) - 3 - JEE MCQ

Two wires of the same dimensions but resistivities ρ₁ and ρ₂ are connected in series. The equivalent resistivity of the combination is

If work function of metal is 3 eV then threshold wavelength will be

A particle falls from a height 'h' upon a fixed horizontal plane and rebounds. If 'e' is the coefficient of restitution, the total distance travelled before rebounding has stopped is

A fixed volume of iron is drawn into a wire of length l. The extension x produced in this wire by a constant force F is proportional to

Pulling force making an angle θ to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is α. then the magnitude of force required to move the body is equal to

The number of bits that a digital computer can process in parallel at a time is called:

If the earth is at one-fourth of its present distance from the sun, the duration of the year will be

Which of the following statement is true about radiations emitted by human body?

A capacitor of capacity C₁ is charged upto V volt and then connected to an unchanged capacitor of capacity C₂. The potential difference across each capacitor will be

A transformer is having 2100 turns in primary and 4200 turns in secondary. An a.c. source of 120 V, 10 A is connected to its primary. The secondary voltage and current are :

In the relation n = PV/RT , n =

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the balance reads 49 N when the lift is stationary. If the lift moves downwards with an acceleration of 5 m/s², the reading of the spring balance would be

If current in a moving coil galvanometer is increased by 1%, then percentage increase in its deflection will be

S.I unit of magnetic flux is

A body projected vertically upwards with a velocity u returns to the starting point in 4 seconds. If g=10 m/sec², the value of u is

If pressure inside two soap bubbles are 1.01 and 1.02 atm respectively, then the ratio between their volumes is (Take atmospheric pressure = 1 atm)

If a cycle wheel of radius 4 m completes one revolution in two seconds. Then acceleration of the cycle will be

A body of mass 2kg is acted upon by two forces each of magnitude 1 newton making an angle of 60º with each other. The net acceleration of the body

The total energy of a particle executing simple harmonic motion is 80 J. What is the potential energy when the particle is at a distance of 3/4 of amplitude from the mean position ?

A gun mounted on the top of a moving truck is aimed in the backward direction at an angle of 30º to the vertical. If the muzzle velocity of the gun is 4 ms⁻¹, then the speed of the truck that will make the bullet come out vertically is

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

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

ML²T^-3 represents the dimensions of :

A stone tied to a string is rotated in a vertical circle. The minimum speed with which the string has to be rotated

8000 identical water drops are combined to form a big drop. Then the ratio of final surface energy to the initial surface energy of all the drops together is

Neutral temperature of a thermocouple is defined as the temperature at which

During the adiabatic expansion of 2 moles of a gas, the internal energy of the gas is found to decrease by 2 joules, the work done during the process on the gas will be equal to