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Electric Circuits

Electric Circuits
The electron is lighter than a proton by a factor of about

 184.
 1840.
 18400.
 18.4.

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Electric Circuits
Phase voltages of a star connected alternator are ER = 240∠0o V, EY = 240∠-120o V and EB = 240∠ + 120o V. What is the phase sequence of the system?

 RYB.
 YBR.
 BYR.
 RBY.

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Electric Circuits
For closer tolerance which of the following capacitors is usually preferred?

 Ceramic disc capacitor.
 Mica capacitor.
 Paper capacitor.
 None of them.

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Electric Circuits
The plates of lead acid storage battery are most likely to be short circuited if

 too much water is added.
 the electrolyte evaporates.
 the battery charged too slowly.
 sediment collect at the bottom of the battery.

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Electric Circuits
A balanced delta connected load has an impedance of 9∠30o Ω per phase. What is the impedance per phase of its equivalent star?

 27∠30o Ω
 30∠30o Ω.
 3∠30o Ω.
None of these

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Electric Circuits
Find the current through 5 Ohm resistor from A to B.

 1A.
 2A.
 -2A.
 -1A.

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MORE MCQ ON Electric Circuits

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