A metal detector consists of a battery providing an alternating current to a transmitter coil and a receiver coil connected to a loudspeaker. Using Faraday's Law of Induction explain how a metal detector works. (5 marks)

The alternating current flows through the transmitted coil and produces a magnetic field around the coil. (1 mark) When the detector passes over a magnetic object, the magnetic field passes through the object. (1 mark) This creates a current around the object. (1 mark) This current induces another magnetic field opposing that of the transmitter coil, due to Lenz's Law. (1 mark) This magnetic field passes through the reciever coil, and as a result makes an electric current flow through the reciever coil and up to the loudspeaker. (1 mark)

Answered by Mabast H. Physics tutor

3435 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

What is the gravitational force between two steel spheres of radius 10 meters and density 8000 kilograms per meter cubed


If photons are little particles emitted by atoms, where were they before they got emitted?


How do I solve a problem about a mass on a slide?


Calculate the flight time of a ball moving in parabolic motion, with initial velocity 5.0m/s at angle 30 degrees from the horizontal travelling for 23 metres.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences