1. In which year did Albert Einstein predict a new state of matter, Bose-Einstein condensate (BEC) in 1924, based on the quantum formulation given by Indian physicist Satyendra Nath Bose?

2. Bose–Einstein condensate (BEC) is a state of matter in which a group of boson particles are in the same quantum state.

1. French scientist Andre-Marie Ampère suggested that a magnet should also exert an equal and opposite force on a current-carrying conductor.

2. A current-carrying wire has its own magnetic field.

3. A current-carrying wire attracts a magnetic material like a normal bar magnet.

4. When the current is withdrawn or the switch is closed, there is no magnetic effect in that case.

5. This phenomenon was called the magnetic effect of current.

1. Resistance of a wire depends on the length and cross-section of the wire.

1. Mechanical energy is a combination of kinetic energy and potential energy.

2. Mechanical energy is defined as the sum of kinetic energy and potential energy used to do work on an object.

3. Mechanical energy is the form of energy that is related to the position and motion of an object.

The correct order of radiations is in descending order of frequencies.

 X-rays > Infrared > Microwaves > Radio waves

1. In 1962, Harry Hammond Hayes published 'The History of Ocean Basins'.

2. In this, the theory of plate tectonics was outlined and which was later also known as 'ocean bottom spreading'.

The Doppler effect was discovered by Austrian scientist Christian Doppler in 1842, describing the change in frequency of any type of sound or light wave produced by a moving source with respect to an observer.

1. The device which is used to measure electric current in an electric circuit is called ammeter.

2. The resistance of an ideal ammeter is always zero and the electric circuit is always connected in series.