History of Electricity Quiz

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What is the law that states an electrically charged conductor in a magnetic field experiences a force?

Lawrence law

How is electrical energy converted into mechanical energy in electrical machines discussed?

By the movement of the armature

What are the two main types of AC motors mentioned in the text?

Induction motors and synchronous motors

What are the outer and inner parts of an AC motor called respectively?

Stator and rotor Signup and view all the answers

What is the key difference in operation between induction motors and synchronous motors?

Induction motors rely on induced EMF for rotor movement, while synchronous motors have synchronized magnetic fields between rotor and stator. Signup and view all the answers

What is the main function of transformers?

Transformers are used to increase or decrease voltage in electrical systems. Signup and view all the answers

What is the difference between a step-up transformer and a step-down transformer?

A step-up transformer increases voltage with more coils in the secondary winding, while a step-down transformer decreases voltage with fewer coils. Signup and view all the answers

What is the basic principle behind generators?

Generators convert mechanical energy into electrical energy using the principle of magnetic induction. Signup and view all the answers

How does an AC generator differ from a DC generator?

AC generators use split rings to collect induced emf, producing alternating current, while DC generators use commutators to collect current, resulting in direct current. Signup and view all the answers

What is the main function of motors?

Motors convert electrical energy into mechanical energy. Signup and view all the answers

What type of energy conversion occurs in electrical machines where the armature rotates?

Electrical energy to mechanical energy Signup and view all the answers

In an induction motor, why does the rotor move?

Due to the induced emf of the stator Signup and view all the answers

What does the synchronization of magnetic fields in a synchronous motor result in?

Higher output efficiency Signup and view all the answers

Which component in a synchronous motor produces a constant magnetic field?

Rotor Signup and view all the answers

What type of current source do AC motors operate on?

Alternating current (AC) Signup and view all the answers

What is the main difference between static machines and dynamic machines?

Static machines convert mechanical energy to electrical energy while dynamic machines do the opposite Signup and view all the answers

How do transformers function in an electrical distribution system?

Transformers transfer power from power stations to desired locations Signup and view all the answers

What is the key purpose of step-up transformers in the context of power distribution?

To increase voltage at transmission towers Signup and view all the answers

In which type of generator are split rings used to collect induced emf?

AC generators Signup and view all the answers

What is the primary function of motors like those found in washing machines and refrigerators?

To convert electrical energy into mechanical energy Signup and view all the answers