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What is the effect of a decrease in the load for a DC motor?
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What is the effect of an increase in the load for a DC motor?

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Explain the effect of variable excitation on the behaviour of synchronous motor under constant load condition.

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A motor has to exert power starting from zero and rising uniformly to 150 HP in 8 mins after which it works at constant power of 100 HP for 5 mins. The motor remains on no load for next 5 mins. The cycle again starts and repeats indefinitely. Determine suitable size of motor.

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DC series motor should never be started at no load. Justify.

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Why does current decrease when voltage increases in a capacitor?

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Illustrate Energy conservation in motor by load matching and operating in star mode.

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Why does the resistance of insulators decrease with an increase in temperature?
Answer : Actually, the resistance of **insulators** typically **increases** with an increase in temperature, not decreases. This is because insulators are materials that do not conduct electricity well. Let me ... case. If I misunderstood and you were asking about semiconductors specifically, let me know!...

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Why does an increase in temperature decrease resistance?

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Why does resistance decrease with an increase in temperature in semiconductors?

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Why does resistance decrease with an increase in temperature?

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What is the effect of self induction in a dc circuit ?

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What effect does the induced voltage have on the current in a DC inductive circuit?

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Why does the terminal potential difference of a battery decrease when the current drawn from it is increased?

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Why does the emf of a battery decrease as it is used?

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Why does the electric field inside a dielectric decrease?

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When a uniform resistance wire is stretched till its length becomes four times does it resistance increase or decrease?

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When a uniform resistance wire is stretched till its length becomes four times does its resistance increase or decrease?

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Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

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Explain the necessity of a starter for a DC motor. State various types of DC motor starters.

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State at least one function and the material used for the following parts of a DC motor.

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Why back emf used for a dc motor? highlight its significance.

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What is the effect of inductor connected in AC and DC circuit?

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What is the effect of inductive reactance in an DC circuit?

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What is the speed variation of the induction motor from no load to full load?

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How does load affect the speed of an induction motor?

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Why does the terminal voltage of cell decrease when current is drawn from it?

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How can voltage increase but current decrease?
Answer : Voltage can increase while current decreases in certain situations, especially when you are dealing with **resistance** and **power** in an electrical circuit. Here's how: 1. **Ohm's Law** ... high-voltage power lines, we see high voltage and low current to minimize energy loss over long distances....

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Why does insulation resistance decrease when temperatures increase?

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Give one application each for AC and DC servo motor.

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What is the effect of supply voltage on the performance of an induction motor?

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Compare Horizontal axis and vertical axis wind machines on the basis of: (i) Power captured for the same tower height. (ii) Noise problem. (iii) Complexity of design and yaw mechanism (iv) Effect of fatigue arising from numerous resonances in structure.

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Draw the phasor diagram for leading load of a transformer.

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Draw the phasor diagram for lagging load of a transformer.

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Draw the phasor diagram for resistive load of a transformer.

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