physics rotational equilibrium

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 and the phos..

01. - A short bar magnet placed with its axis at 300 with a uniform external magnetic field of 0.16 T experiences a torque of magnitude 0.032 J. (a) Estimate the magnetic moment of the magnet. (b) If the bar were free to rotate, which orientation would correspond to its (i) stable, and (i..

04. - A circular coil of 16 turns and radius 10 cm, carrying a current of 0.75 A rests with its plane normal to an external field of magnitude 5.0 x 10 - 2 T. The coil is free to turn about an axis in its plane perpendicular to the field direction. When the coil is turned slightly and released, it ..

Let the burner lie on its side as in figure below. Push it slightly and see what happens. On further pushing, the C.G. neither gets raised nor lowered. The burner just rolls maintaining its center of gravity at the same level. Objects like cylinders and cones lying on their side roll because they ..

What makes a body stable? An object is said to be stable if it is steady and well balanced so that when it is pushed slightly it does not topple or fall off easily. Let us try to do a simple experiment or derive the conditions for stability. Experiment 1: Stick three pins close together to the..

When two substances at different temperatures are brought together, heat energy flows from a substance at higher temperature to a substance at lower temperature. The heat flow continues till their temperatures are equalized. At this stage, the substances are said to be in thermal equilibrium..

Place the burner upside down as shown in figure below. A slight push causes the C.G. to be lowered and the burner begins to fall to make the C.G. as low as possible [Figure (b) below)..

If 'w' is the angular velocity of the Earth and f is the latitude of the place..

Equilibrium of Rigid Bodies - A rigid body is said to be in equilibrium if, both the linear and angular momentum of a rigid body have a constant value. For the equilibrium of a rigid body, the body need not be at rest. However, if it is at rest, it is called the static..

A body on which two or more forces act is said to be in equilibrium if there is no change in its state of rest or of uniform motion. The condition necessary for equilibrium is that the vector sum of forces acting on the body should be zero. i.e., This also implies th..