• Starting methods of synchronous motor? Synchronous motor is widely used in industries. This motor is not self starting it requires some additional devices to start the motor. Synchronous motor can started by the following three methods: 1. External prime mover 2. Damper winding 3. Starting using variable frequency External prime mover In this method, […]
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Electrical power
Electrical power Electrical power is generally defined that it is the product of current and voltage in an electric circuit. But it does not clear the concept. Although, Electric power is the rate at which electric energy is consumed in an electric circuit. It tell us how fast a electric circuit is consuming energy. Electric […]
Resistance
What is Resistance? Resistance is defined as the property of substance due to which it opposes the electric current flow through it. For the better understanding take an example. When a potential difference or voltage is applied across a conducting substance, the free electrons start flowing through it. As we know that every substance consists of […]
MCQ on Transmission and Distribution – 8
« Back CONTENTS Next » 1. The minimum phase neutral voltage at which Corona occurs is called (A) knee voltage. (B) flash over voltage. (C) critical disruptive voltage. (D) visual critical voltage. 2. For constant voltage transmission the voltage drop is compensated by installing (A) synchronous motors. (B) capacitors. (C) inductors. (D) […]
MCQ on Electromagnatism – 1
« Back CONTENTS Next » 1. The curve between frequency and current is known as (A) voltage curve. (B) power curve. (C) resonance curve. (D) load curve. 2. Which of the following circuit element stores energy in the electromagnetic field ? (A) Inductance. (B) Condenser. (C) Variable resistor. (D) Resistance. […]
MCQ on Engineering Materials – 4
« Back CONTENTS Next » 1. Resistivity of a material depend on (A) nature of material. (B) area of the conductor section. (C) length of the conductor. (D) all of the above. 2. Negatively charged particle present in an atom is (A) Molecule. (B) Proton. (C) Neutron. (D) Electron. 3. […]