KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 76 - 79 of 268

Question

The surface of a planet is found to be uniformly charged. When a particle of mass m and no charge is thrown at an angle from the surface of the planet, it has a parabolic trajectory as in projectile motion with horizontal range L. A particle of mass m and charge q, with the same initial conditions has a range. The range of particle of mass m and charge 2q with the same initial conditions is –

Question

The potential energy of a point particle is given by the expression. A dimensionless combination of the constants α, β and γ is –

Question

A steady current Ι flows through a wire of radius r, length L and resistivity ρ. The current produces heat in the wire. The rate of heat loss in a wire is proportional its surface area. The steady temperature of the wire is independent of

Question

The capacitor of capacitance C in the circuit shown is fully charged initially, Resistance is R.

After the switch S is closed, the time taken to reduce the stored energy in the capacitor to half its initial value is: