Question

Identify which of the following instruments does not have magnet:
A. Radio
B. Television
C. Electric bulb
D. Toaster

Answer 1

Hint: The above problem can be resolved using the concepts and working principle of the devices given in the problem. The magnets are used in those appliances for the devices, where there is some necessity to generate sound waves or sound energy. The problem can be processed to its solution by analysing the device that is used for the purpose to generate the sound.

Complete step by step answer:
The instruments like television and the radio use the magnet to function out their speakers, such that the magnet can perform the function to convert the electrical signal into the sound energy.
On the other hand, the instruments like electric bulb and toaster do not contain the magnet.
The electric bulb consists of the filament of wire that undergoes heating at the higher temperature to glow, and the visible light rays are obtained. The toaster is a small electrical appliance that is designed to form the toast of the sliced by keeping it to the contact of heat radiation, thereby converting to the toast.
Therefore, the electric bulb and the toaster are the devices that utilise the magnet and options (C) and (D) are correct.

Note:The above problem can be resolved using the concepts and working principle of the devices given in the problem. The magnets are used in those appliances for the devices, where there is some necessity to generate sound waves or sound energy. The problem can be processed to its solution by analysing the device that is used for the purpose to generate the sound.