The magnetic relay is a device used for

Assessment: WAEC SSCE - Physics - 2012 (Objective) Subject: Physics

Question 1 Report

The magnetic relay is a device used for
Answer Details
The magnetic relay is a device used for controlling another circuit carrying a larger current. It consists of an electromagnet, a spring-loaded armature, and a set of contacts. When a current passes through the coil of the electromagnet, it generates a magnetic field which attracts the armature and causes it to move, closing or opening the contacts. This can be used to switch on or off a circuit carrying a larger current, or to switch between different circuits. The magnetic relay is commonly used in applications such as industrial automation, power systems, and telecommunications.
Read lesson note on Electric Field (WAEC)
Read lesson note on Magnetic Field (Part 1) (WAEC)
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