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Electric Circuits

Electric Circuits
A voltage of v = 100 sin (wt + π/3) is applied to pure resistor of 30 Ohm. What is the RMS value of current is

 4.71.
 2.36.
 5.77.
 1.92.

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Electric Circuits
Emf induced in a coil rotating in a uniform magnetic field will be maximum when the

 rate of change of flux linkage is maximum.
 rate of cutting flux by coil sides is minimum.
 flux linking with the coil is maximum.
 rate of change of flux linkage is minimum.

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Electric Circuits
Which of the following substance when added to electrolyte promotes smooth deposition?

 Gelatine.
 Any of above.
 Albumen.
 Glucose.

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Electric Circuits
In a series R, L circuit, voltage across resistor and inductor are 3 V and 4 V respectively, then what is the applied voltage?

 5V
 7V
 3V
 4V

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Electric Circuits
The ratio of the resistance of a 200 W, 230 V lamp to that of a 100 W, 115 V lamp will be

 4.
  0.5.
  2.
 0.25.

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Electric Circuits
Three identical resistor are connected in star across a 3 phase 550 V supply dissipating a total power of 300 W the line current is ____________ A.

 1
 3.149
 0.5
 2.56

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