State whether the following statements are true or false.
a. An electric motor converts mechanical energy into electrical energy.
b. An electric generator works on the principle of electromagnetic induction.
c. The field at the center of a long circular coil carrying current will be parallel straight lines.
d. A wire with green insulation is usually the live wire of an electric supply.
a. False
An electric motor converts electrical energy into mechanical energy.
b. True,
An electric generator is a device that generates electricity by rotating a coil in a magnetic field.
c. True,
A long circular coil is a solenoid. The magnetic field lines inside a solenoid are parallel straight lines.
d. False
Live wires have red insulation cover, while the earth wire has green insulation.
Answered by Shivani Kumari | 2 years agoWhat is the function of an earth wire? Why is it necessary to earth metallic appliances?
When does an electric short circuit occur?
Explain the underlying principle and working of an electric generator by drawing a labeled diagram. What is the function of brushes?
State the rule to determine the direction of an
(i) magnetic field produced around a straight conductor carrying current,
(ii) force experienced by a current-carrying straight conductor placed in a magnetic field which is perpendicular to it, and
(iii) current induced in a coil due to its rotation in a magnetic field.
Two circular coils A and B are placed closed to each other. If the current in coil A is changed, will some current be induced in the coil B? Give a reason