Physics Test 51...

Direction:In the given figure, a hollow spherical capacitor is shown. The electric field will not be zero at

The potential energy of a 1 kg particle, free to move along the x-asis, is given by  The total mechanical energy of the particle is 2 J. Then, the maximum speed (in m/s) is

The electron in a hydrogen atom makes a transition n₁ → n₂, where n₁ and n₂ are the principal quantum numbers of the two energy states. Assume Bohr's model to be valid. The time period of the electron in the initial state is eight times that in the final state. What are the possible values of n₁ and n₂?

A satellite is revolving in a circular orbit distance of 2620 km  from the surface of the earth. The time period of the revolution of the satellite is (Radius of the earth = 6380 km, mass of the earth = 6 × 10²⁴ kg, G = 6.67 × 10¹¹ N - m²/kg².

The first law of motion is also known as the law of

Given that the values of inductance L = 1μH and capacitance C = 0.01μF. Calculate the wavelength of electromagnetic wave generated is?

A string of negligible mass going over a clamped pulley of mass m supports a block of mass M as shown in the figure. The force on the pulley by the clamp is given by

A metal plate of area 10³ cm² rests on a layer of oil 6 mm thick. A tangential force of 10² N is applied on it to move it with a constant velocity of 6 cm s¹. The coefficient of viscosity of the liquid is

The cyclotron frequency of an electron grating in a magnetic field of 1 T is approximately

A round disc of moment of inertia I₂ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia I₁ rotating with an angular velocity ω about the same axis. The final angular velocity of the combination of discs is