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Which of the following relations is wrong? (1) Torque = Moment of inertia × Angular acceleration (2) Torque = Dipole moment × Magnetic induction (3) Moment of inertia = Torque × Angular acceleration (4) Linear momentum = Moment of inertia × Angular velocity

Answer: (3) Moment of inertia = Torque × Angular acceleration Net Torque is the product of moment of inertia and angular acceleration.Torque... View Article

Rolling motion is

Rolling motion is combination of rotatory and translatory motion.... View Article

Binding energy of a satellite is

The binding energy is the negative of the total energy of the satellite.... View Article

Kinetic Energy of a rotating body i.e. Rotational Kinetic Energy can be converted to various forms of energy they are

Rotational Kinetic Energy can be converted to Heat, Linear Kinetic Energy, and Potential Energy.... View Article

Gravitational Potential is:

Gravitational Potential is negative, scalar quantity, unit JKg-1. It is represented by the symbol V. The gravitational potential at a point in... View Article

If a body in rest breaks up into two pieces of equal masses, then, the parts will

If a body in rest breaks up into two pieces of equal masses, then, the parts will move in opposite directions with equal speeds.... View Article

A value of Reynold’s number _________ indicates turbulence.

Reynold's number R > 2000 indicates turbulence.... View Article

Force of viscosity acting on a spherical body of radius r moving with velocity v through a fluid of viscosity η is given by

Force of viscosity acting on a spherical body of radius r moving with velocity v through a fluid of viscosity η is given by F = 6 π η r v... View Article

The quantity which decides the nature of flow of a viscous liquid through a pipe is known as

The quantity which decide the nature of flow of a viscous liquid through a pipe is known as Reynold's Number.... View Article

Direction of linear velocity of a particle rotating in a circular motion is :

Direction of linear velocity of a particle rotating in a circular motion is along the tangent.... View Article

From a waterfall, water is falling at the rate of 100 kg/s on the blades of a turbine. If the height of fall is 100 m, the power delivered to the turbine is

Power = work done / time taken or P = mgh / t P = (m/t) gh = 100 x 10 x 100 = 100 kW... View Article

Viscosity of gases _with temperature, whereas viscosity of liquids _with temperature.

The viscosity of gases increases with temperature, whereas the viscosity of liquids decreases with temperature. The intermolecular forces... View Article

Work done by or against a conservative force in a round trip is

Work done by or against a conservative force in a round trip is zero... View Article

During flight, the weight of the plane is balanced by

When the aerofoil moves against the wind, the orientation of the wing relative to flow direction causes the streamlines to crowd together above... View Article

Paint gun depends upon?

Paint spray gun works on the principle of Bernoulli's theorem. Bernoulli's theorem states that the total mechanical energy of the moving fluid... View Article

Which of the following cannot be explained on the basis of Bernoulli’s principle? (1) Lift on an aircraft’s wing (2) Ink filler (3) Swing of a cricket ball (4) Atomizer

Answer: (2) Ink filler Bernoulli’s principle states that the total mechanical energy of the moving fluid comprising the gravitational... View Article

Bernoulli’s theorem is applied to:

Bernoulli's theorem is applied to incompressible liquid in streamlined flow.... View Article

To which type of fluid is the Bernoulli’s theorem applicable:

To which type of fluid is the Bernoulli's theorem applicable incompressible, isotropic and non-viscous.... View Article

In the houses far away from the municipal water tanks often people find it difficult to get water on the top floor. This happens because

During the flow of water, a part of pressure energy is dissipated in doing work against friction.... View Article

Water is flowing through a horizontal pipe in streamline flow at the narrowest part of the pipe:

According to Bernoulli's theorem P/ρ + ½v² + gh = Constant. Therefore, where v is maximum, P is minimum and vice versa.... View Article

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