SRMJEEE Physics Mock Test - 8 - JEE MCQ

A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends. The tube is then rotated in a horizontal plane about one of its ends with a uniform angular velocity ω. The force exerted by the liquid at the other end is

A moving coil galvanometer has a resistance of 50 Ω and gives full scale deflection for 10 mA. How could it be converted into an ammeter with a full scale deflection for 1A?

A shell initially at rest explodes into two pieces of equal mass. The two pieces will

Photo cell is a device to

Stress to Strain ratio is equivalent to

Consider the following statements regarding the magnitude of barrier potential of a PN junction:
1. It is independent of temperature
2. It depends on difference between fermi levels on two sides of junction.
3. It depends on forbidden energy gap on two types of semiconductors
4. It depends on impurity concentration in P and N type semiconductors
Which of the statements given above is/are correct?

If an unchanged capacitor is charged by connecting it to a battery, then the amount of energy lost as heat is

A satellite is revolving near the earth's surface. Its orbital velocity is

A motorcyclist of mass m is to negotiate a curve of radius r with a speed ν. The minimum value of the coefficient of friction so that this negotiation may take place safely, is

Heat travels through vacuum by

The factor not needed to calculate heat lost or gained when there is no change of state, is

A rocket of mass 6000 kg is fired from earth with speed 1 km/s. What should be the rate of ejection of gas, so that it moves with initial acceleration 20 m/s²? (Take g = 10 m/s²)

A galvanometer of 100 Ω resistance gives full scale deflection with 0.01 A current. How much shunt resistance should be connected with it to convert into an ammeter of range 10 A?

In a container, the velocity of water flowing through a hole at a depth h from the surface of water is 5 m-s⁻¹. If the container has the hole at a depth 4h from the surface of water, then velocity of water flowing through the hole is

A body falling from a high Minaret travels 40 metres in the last 2 seconds of its fall to ground. Height of Minaret in metres is (take g = 10m/s²)

The figure below shows the various positions (labelled by subscripts) of small magnetized needles P and Q. The arrows show the direction of their magnetic moment. Which configuration corresponds to the lowest potential energy among all the configurations shown?

A stone released with zero velocity from the top of the tower reaches the ground in 4 seconds. The height of the tower is about

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

Two simple pendulums of length 0.5 m and 20 m respectively are given small linear displacement in one direction at the same time. They will again be in the phase when the pendulum of shorter length has completed... oscillations

Max. height of a bullet when fired at 30^° with the horizontal is 11 m. Then height when it is fired at 60^° is

Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tension are 60 and 50 dynes/cm respectively. Ratio of heights of liquid in the two tubes, h₁ / h₂ is

Green light of wavelength 5460 Å is incident on an air glass interface. If refractive index of glass is 1.5, then wavelength of light in glass would be

A circular turn table has a block of ice placed at its centre. The system rotates with an angular speed ω about an axis passing through the centre of the table. If the ice melts on its own without any evaporation, the speed of rotation of the system

In an experiment of simple pendulum, the errors in the measurement of length of the pendulum (L) and time period (T) are 3%v and 2% respectively. The maximum percentage error in the values of (L/T²) is

When a cylindrical tube is dipped vertically into a liquid, the angle of contact is 140°. When the tube is dipped with an inclination of 40°, then angle of contact is

The emf in a thermoelectric circuit with one junction at 0°C and the other at t°C is given by E = At-Bt². The neutral temperature is then

A cylinder contained 10 kg of gas at 10⁷ N/m². The quantity of gas taken out of cylinder if final pressure is 2.5 x 10⁶ N ∕ m² is (temp. is constant)