Physics 2000 JAMB Past Questions - Question 38: A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are

Correct Answer

B

Explanation

The radiations that can be deflected by both magnetic and electric fields are typically charged particles. When charged particles such as electrons or protons are emitted from a radioactive source, they can be subjected to both magnetic and electric fields, which can alter their path or trajectory. This phenomenon is the basis for a device known as a mass spectrometer. A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are

In a mass spectrometer, charged particles from a radioactive source are accelerated through an electric field, causing them to gain kinetic energy and move along a defined path. Then, a magnetic field is applied perpendicular to the path of the particles. The combination of the electric and magnetic fields causes the particles to move in a curved trajectory. The radius of the curvature of their path depends on their mass-to-charge ratio. By measuring the radius of the curvature, scientists can determine the mass and charge of the emitted particles.

So, in summary, the radiations emitted from a radioactive source that can be deflected by both magnetic and electric fields are typically charged particles like electrons, protons, or ions.