Practice MCQ Questions and answers on Physics-GK

In a magnetic field, the direction of motion of a current carrying conductor is given by Flemings left hand rule.

The force between charged particles is called as Electromagnetic Force.

A moving charged particle produces a magnetic field.

Nuclear sizes are expressed in a unit called "Fermi" which is a unit of length equal to 1015 metre(one femtometre), used in nuclear physics.

Beta particles are fast moving electrons which are emitted by the nucleus.

Nuclear fusion, the source of all the energy so generously radiated by the Sun, does two things: it converts hydrogen into helium (or rather, makes helium nuclei from protons) and it converts mass to energy.

Gamma radiation, also known as gamma rays or hyphenated as gamma-rays and denoted as y, is electromagnetic radiation of high frequency and therefore high energy. Gamma rays are ionizing radiation and are thus biologically hazardous. They are classically produced by the decay from high energy states of atomic nuclei (gamma decay), but are also created by other processes. X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. They are shorter in wavelength than UV rays and longer than gamma rays.

Heavy water is used in nuclear reactor to slow down neutron.

Radiocarbon is produced in the atmosphere as a result of collision between fast neutrons and nitrogen nuclei present in the atmosphere.

2 beta and 1 alpha emitted by radioactive element after 3 consecutive disintegration.