A 60 cycle alternating current has a maximum value of 40 amperes. It crosses the time axis in a positive direction when time is zero. Determine a. time when current first reaches a value of 20 amperes in 2nd time. B. time when current first reach a negative value of 30 amperes. C. the value of current when time is 1/120 sec.

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A: In this question we will find relation between field current and flux....

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A: Rotating speed  N=120f/P P no of poles f frequency

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A: We have been given an coil with, Coil turns (N) = 100 turns   Inductance of coil (L) = 500 mH = 500…

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Q: If the peak value of a certain sine wave voltage is 10 V, what is the peak-to-peak value? (a) 20 V…

A: Peak value vm = 10 V We have to find the peak to peak voltage

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A: We need to find power dissipation for given resistor

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A:

Q: A flux of 19 mWb links with a 1340 turns coil and the inductance of 12 H. The value of energy stored…

A: Given that  Flux = 19 m Wb No. of turns = 1340 turns ] Inductance = 12 H  Energy stored in inductor…

Q: The polarity of an induced voltage is determined by (a) Lenz's law (c) the amount of current in the…

A: The polarity of an induced voltage is determined by Lenz's law

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Q: An ignition coil having 10000 turns has an e.m.f. of 8kV _induced in it. What rate of change of flux…

A: The solution can be achieved as follows.

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A: Only one individual question is to be answered. 1. The cavity resonator is a device or a system…

Q: O 0.06 second

A:

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A: This is a basic problem of sinusoidal and phasor. The solution is given in the next step

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Q: At what rate the flux must be varied to measure 12 V across the terminal of 300 turns coil?

A:

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Q: 5. A welder machine operates automatically as follows : 30A current in 10 seconds, 20A in 10 sec.,…

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A:

Q: One motor has a speed of 1,800 revolutions per minute.  A second motor turns at 3,600 revolutions…

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Q: HOW A MAGNETIC FIELD IS PRODUCED

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A: The circuit diagram,

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Q: EXPLAIN BRIEFLY THE SYCHRONOUS ALTERNATOR WHEN OPERATING AT NO LOAD

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A:

Stability

Stability is the property or that power of any system which shows that whenever a certain load or force is applied to a system then it will come back to the equilibrium state or it will resist any kind of changes in the system. Any stable system shall remain in the same condition of stability for any amount of system of loads. To check or to finalize the stability of the system, types of loads and the point of application are neglected or are not considered.