physical significance of direction of torque

Torque is the product of the magnitude of the force and the lever arm of the force. What is the significance of this concept in our everyday lif..

To increase the turning effect of force, it is not necessary to increase the magnitude of the force itself. We may increase the turning effect of the force by changing the point of application of force and by changing the direction of forc..

It is the expression of accuracy of a physical quantity. The value in digits, accurately known in a measurement plus one digit that is not certain, is called significant figures. Significant figures is directly proportional to the accuracy of measuremen..

It is the expression of accuracy of a physical quantity. The value in digits, accurately known in a measurement plus one digit that is not certain, is called significant figures. Significant figures is directly proportional to the accuracy of measurement. Eg...

A bar magnet of magnetic moment 1.5 lies aligned with the direction of a uniform magnetic field of 0.22 tesla. (a) What is the amount of work required to turn the magnet so as to align its magnetic moment. (i) Normal to the field direction. (ii) Opposite to the field dire..

When a current is passed through the coil in the direction PQRS, then the coil experiences a torque t = NIBA sin a Since the magnified field is radial the plane of the coil is parallel to the magnetic field such that a = 90 o and hence t = NIBA. The coil rotates an..

When a substance is placed in an external magnetic field, the substance experiences a torque due to the field and aligns in the same direction as the field. The magnetisation so produced in the substance is called Induced magnetisation and strength of external field is called i..

are assumed to be in the plane of the paper. From the above, it is found that an electric dipole placed in uniform electric field experiences a torque which align the dipole parallel to the direction of the electric fiel..

Then, V = -q.2a E cos q V = - p.E Dipole has minimum potential energy when aligned with the field, and also remember that a dipole in a uniform field experiences a torque ( t =p.E). Thus, if the dipole can fritter away its potential energy, the torque will align the dipole in th..

Magnetic Field Lines - The compass needle always lies along the direction of the field. The figure below shows the lines or pattern of the field, when the compass needle is placed at several places. These lines do not really, tell us the effect that magnet has on the other. These field li..