Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

The magnetic field at the centre of a current carrying loop is B and its area is A. Magnetic moment of the loop will be :

If a charged particle is projected perpendicular to a uniform magnetic field, then:

1. It revolves in circular path
2. Its K.E. remains constant
3. Its momentum remains constant
4. Its path is spiral

The difference between the mass of a nucleus and the combined mass of its nucleons is:

In a transformer 220 ac voltage is increased to 2200 volts. If the number of turns in the secondary are 2000, then the number of turns in the primary will be(a) 200(b) 100(c) 50       (d) 20

A perpendicular material is place in a magnetic fields. Consider the following statemetns:

1. If the magnetic field is increased, the magnetization is increased.
2. If the temperature is increased, the magnetization is increased.

Which error is removed when the known and unknown resistances are interchanged in a Meter Bridge?

Two current carrying loops of same area but of different materials have same current flowing in them in anti-clockwise direction. if a magnetic field is applied in upward direction then potential energy of loop 1 and loop 2 will always be:

According to modern astronomers into how many constellations, the whole sky is divided