Moving Coil Concepts

Explain the construction of a moving coil.

• The construction of a moving coil involves using a solid metal rod instead of a cylindrical form.

• A moving coil is constructed by using a single loop of wire instead of winding a coil.

• Moving coil construction requires the coil to be placed outside the magnetic field.

• The construction of a moving coil involves winding a coil of wire around a cylindrical form and placing it within a magnetic field.

What is the principle behind the working of a moving coil?

• Chemical reaction

• Static electricity

• Electromagnetic induction

• Nuclear fusion

How does a moving coil convert mechanical energy into electrical energy?

• Through chemical reactions

• By converting heat directly

• Via mechanical gears

• Through electromagnetic induction

Discuss the components involved in the construction of a moving coil.

• Rubber band

• Coil of wire, former or bobbin, magnet, suspension system

• Coil of plastic

• Paper clip

What are the key features of a moving coil instrument?

• Low accuracy, high power consumption, non-linear scale, low sensitivity

• Medium accuracy, medium power consumption, non-linear scale, low sensitivity

• High accuracy, low power consumption, non-linear scale, low sensitivity

• High accuracy, low power consumption, linear scale, high sensitivity

Describe the applications of moving coil in real-life scenarios.

• Loudspeakers, microphones, galvanometers, seismometers

• Refrigerators, washing machines, cars

• Ovens, toasters, blenders

• Computers, smartphones, tablets

How does the movement of the coil inside a magnetic field generate a current?

• The coil generates current by repelling the magnetic field

• The movement of the coil creates a frictional force that generates current

• The changing magnetic field induces an electromotive force (EMF) in the coil according to Faraday's law of electromagnetic induction, generating a current.

• The coil absorbs the magnetic field and converts it into current

Explain the working of a moving coil galvanometer.

• In a moving coil galvanometer, the coil moves due to the pressure exerted by the surrounding air.

• A moving coil galvanometer operates by electromagnetic induction, where current in the coil interacts with a permanent magnet's field, resulting in coil deflection proportional to the current.

• The working of a moving coil galvanometer involves gravitational forces acting on the coil.

• A moving coil galvanometer operates based on chemical reactions within the coil, causing deflection.