The armature of a d.c. The machine has a resistance of 0.25 ohm and is connected to a 300V supply. Determine the e.m.f. generated when it runs as a generator giving 100 A and as a motor taking 80 A.

Q: Compare between friction, conduction and induction of static electricity

A: There are three methods of charge transfer namely: Friction Conduction Induction

Q: What do you think will happen when they switches are turned closed.

A: Required : What will happen when the switches are closed.

Q: 7Name the process of charging a conductor by bringing it near another charged object without…

A:

Q: work done by magnetic force

A:

Q: What happens in the secondary coil of a transformer?

A: secondary coil

Q: Why is three wire system used in industries?

A: In the industries the heavy machineries are used which have the body made by iron.

Q: What happens to a magnet when it comes into a larger magnetic field?

A: Answer Magnets are drawn along the magnetic field gradient. If opposite poles of two seperate…

Q: what happens when you take away the magnetic field from an induced magnet

A: The magnetism is produced by the magnetic field around the magnets.

Q: Which of the following rule is used to determine the direction of rotation of the coil of the D.C…

A: The direction of rotation of the coil in dc motor

Q: Identify the laws of electromagnetic induction.

A:

Q: explain the disadvantage of transmitting electrical energy over distances

A: Transmitting electrical energy over long distances presents several disadvantages, primarily related…

Q: APPLICATION: 1. Give some uses of electromagnets a b d What is the function of an electromagnet in a…

A: The use of electromagnets :- We are using the electromagnet in the following Motors and generators.…

Q: Name two appliances in which an electric motor is used.

A: The electric motor work principle is based on Fleming’s left hand rule. Electric motor converts…

Q: It is an electronic device that transforms an alternating current into direct current.

A: A Rectifier is a device that converts alternating current into direct current. The Rectifier is made…

Q: What happens when two north poles of a magnet are placed together? A) They repel B They cancel each…

A: In the given problem two north pole of a magnet are placed together

Q: 10. Explain the concept of magnetic drag on a sheet of metal as it swings in the presence of a…

A: We have to explain magnetic damping and what causes it in the context of above mentioned figure

Q: Suppose you slowly move a bar magnet near a coil of wire. You then move the bar magnet near the coil…

A: Given A bar magnet move near to a coil. First time bar magnet move slowly, Second time bar magnet…

Q: What is magnet field

A: What is magentic field.

Q: Demonstrate the changes in a charge moving in a magnetic field

A:

Q: Name the material used for making a fuse wire. Give a reason.

A: The fuse wire is made up of by the combination of lead and tin metal. The reason behind the choice…

Q: Explain the idea that an electric generator is an "electric motor in reverse"

A: Electric motor is an electrical machine that converts electrical energy to mechanical energy.…

Q: An iron rod becomes magnetic when the magnetic domains point in the same direction its electrons…

A: Correct answer - (a) the magnetic domains point in the same direction

Q: 7. Recall the motor principle. In what three ways can the magnetic force be increased?

A: To answer: The motor principle Three ways the magnetic force be increased.

Q: What is the difference between DC and AC electricity? Identify some common sources of each type of…

A: Direct current (DC) is the flow of electric charge in only one direction. It is the steady state of…

Q: What are the basic contents of "Law of electro magnetic induction" ?

A:

Q: Which pole of a magnet in a compass points north? O South Pole O North Pole O Neutral Pole None of…

A: The problem is based on the concept of magnet and magnetic fields. We know that a magnetic field is…

Q: What electrical quantity cannot be changed by a transformer

A: What electrical quantity cannot be changed by a transformer.

Q: What is the purpose of a switch?

A: Switch is an electrical component by which we can physically connect or disconnect the conducting…

Q: Explain the concept of eddy current

A: The current induced within the conductor whenever there is a change in magnetic field in the…

Q: What are AC generators and transformers?

A: AC generators: AC generators are also known as alternators which converts mechanical energy into…

Q: State and explain five practical applications of eddy currents

A: Solution: Application of the eddy current

Q: LA transformer is a device that

A: