Electrostatics — Physics STD 12 Science — Question

In summer, a mild wind is often found on the shore of a calm river. This is caused due to,

1. Difference in thermal conductivity of water and soil.
2. Convection currents.
3. Conduction between air and the soil.
4. Radiation from the soil.

Magnetic fields at two points on the axis of a circular coil at a distance of 0.05m and 0.2m from the centre are in the ratio 8 : 1. The radius of the coil is(a) 1.0 m (b) 0.1 m(c) 0.15 m(d) 0.2 m

An inductor, a resistor and a capacitor are joined in series with an AC source. As the frequency of the source is slightly increased from a very low value, the reactance of the.

In any Bohr orbit of the hydrogen atom, the ratio of kinetic energy to potential energy of the electron is(a) 1/2(b) 2(c) -1/2   (d)  -2

Which line shows the path of beta radiation in a magnetic field?

Which of the following systems may be adequately described by classical physics?

A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop

Waves in decreasing order of their wavelength are:

A cube of a metal is given a positive charge Question: For this system, which of the following statements is true?

The magnetic dipole moment of a current loop is independent of: