Tell the odd one out. Give proper explanation.
a. Fuse wire, bad conductor, rubber gloves, generator.
b. Voltmeter, Ammeter, galvanometer, thermometer.
c. Loud speaker, microphone, electric motor, magnet.
Explain the construction and working of the following. Draw a neat diagram and label it.
Electric Generator (AC)
Electromagnetic induction means
a. Charging of an electric conductor.
b. Production of magnetic field due to a current flowing through a coil.
c. Generation of a current in a coil due to relative motion between the coil and the magnet.
d. Motion of the coil around the axle in an electric motor.
Explain the difference:
AC generator and DC generator.
Which device is used to produce electricity? Describe with a neat diagram.
a. Electric motor
c. Electric Generator (DC)
How does the short circuit form? What is its effect?
Give Scientific reasons.
Tungsten metal is used to make a solenoid type coil in an electric bulb.
In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc, an alloy such as Nichrome is used, not pure metals.
For electric power transmission, copper or aluminum wire is used.