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Electric Circuits

Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 75.
 105.
 15.
 60.

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Electric Circuits
Two resistances R1 and R2 are connected in series across the voltage source where R1 > R2. The largest drop will be across

 R2.
 none of them.
 R1.
 either R1 or R2.

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Electric Circuits
A 3 wire, 3 - φ supply feeds a load consisting of three equal resistors. By how much is the load reduced if one of the resistors be removed when the load is in star?

 33.33 % of the original load.
 25 % of the original load.
 66.66 % of the original load.
 50 % of the original load.

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Electric Circuits
A 3Ω resistor having 2A current will dissipate the power of

 2 W.
 12 W.
 4 W.
 8 W.

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Electric Circuits
The charge of an electron is

 - 9.109 × 10 - 31 Coulombs.
 - 1.602 × 10 - 19 Coulombs.
 - 1.675 × 10 - 27 Coulombs.
 - 1.672 × 10 - 27 Coulombs.

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Electric Circuits
A wire of 0.14 mm diameter and specific resistance 9.6 Ω - cm is 440 cm long. The resistance of the wire will be

 13.7 Ω.
 27.4 Ω.
 11.3 Ω.
 9.6 Ω.

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