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An induction motor cannot run at synchronous speed. If it runs at synchronous speed, there would be no cutting of the flux by the rotor conductors and there would be no induced EMF, no current and no torque. Therefore, the rotor of the induction motor rotates at a speed slightly less than the synchronous speed.

If the diameter of both wires are the same, the **solid wire** will carry more current than the stranded wire. This is because the cross-sectional area of the solid wire is bigger than the stranded wire as there is an air-gap between the strands of the conductor in it.

The neutral is connected to earth in a transformer to provide a low-impedance path for fault currents to flow to earth. This helps protect people and equipment from electrical shock and damage.

Long transmission lines are transposed to reduce the effects of inductive and capacitive coupling between the conductors. Transposition is done by periodically swapping the positions of the conductors of a transmission line to reduce crosstalk and otherwise improve transmission.

Electronic devices use DC supply instead of AC supply because of the following reasons: Digital Logic Gates: The basic working principle of logic gates is based on “Binary” states which is “1” (ON) and “0” (OFF). In ICs, Microprocessors and digital computers, they need ripple free and pure DC as input signal to generate a…

Answer: current transformer (CT) is a device that measures the current in a circuit by producing a proportional current in its secondary winding. A CT can have different accuracy classes depending on its purpose. A 5P20 CT means that it is a protection class CT with an accuracy of 5% and an accuracy limit factor…

Answer: High-voltage cables are smaller than low-voltage cables because they have more semiconductor layers and shielding layers than low-voltage cables. Therefore, high-voltage cables have much thicker insulation layers and a more complex structure than low-voltage cables. The process requirements for high-voltage cables are also higher.

Answer: The primary function of insulators in high-voltage transmission lines is to separate the conductor from the transmission tower in the transmission line. They create a barrier between the active parts of an electrical circuit and restrict the flow of current to wires or other conducting paths as needed. In a wire, an electric current…

1. The armature of a D.C. generator is usually made of (A) silicon steel. (B) copper. (C) non-ferrous material. (D) cast iron. ANSWER: (A) silicon steel.