Physics Test 84...

A body falling vertically downwards under gravity breaks in two parts of unequal masses. The centre of mass of the two parts taken together shifts horizontally towards :

Which of the following statement is incorrect:

Three thin rods each of length L are arranged in a inverted U, as shown in figure. The two rods on the arms of U each have mass M the third rod has mass 3M. The center of mass of the system from centre of upper rod is:

A stationary body explodes into four identical fragment such that three of them fly off mutually perpendicular to each other with same kinetic energy E₀. Then total energy of explosion is :

Two blocks A and B are connected by a massless string as shown. A force of 30N is applied on block B. The distance travelled by centre of mass in 2 second starting from rest is:

A circle of area A lies in the x-y plane in a region, where the magnetic field is given by . Where a, b, c are constant. The magnitude of flux in Wb passing through the circle is:

A square coil of side 25 cm having 1000 turns is rotated with a uniform speed in a magnetic field about an axis perpendicular to direction of field. At an instant t. The emf induced in the coil is e = 200 sin (100πt). The magnetic induction is :

An emf induced in a coil, the linked magnetic flux:

In the following figure, the magnet is moved towards the coil with a speed V and induced emf is 'e'. If magnet and coil recede away from one another each moving with speed V, the induced emf in the coil will be :

A square coil ABCD lying in x-y plane with its centre at origin. A long straight wire passing through origin carries a current i = (2t + 2) in negative z-direction. The induced current in the coil is :