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Electric Circuits

Electric Circuits
A 100 ohm resistor is directly connected across a 80 V battery. What is the power dissipation?

  64 W.
 1 W.
 5 W.
 10 W.

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Electric Circuits
Which battery is used in aeroplanes?

 None of them.
 Dry cell battery.
 Edission cell.
 Lead acid battery.

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Electric Circuits
Kirchhoff's second law is based on law of conservation of

 mass.
 charge.
 momentum.
 energy.

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Electric Circuits
Two resistances R1 and R2 give combined resistances 4.5 Ω and 1 Ω when they are connected in series and parallel respectively. What would be the values of these resistances?

  3 Ω and 6 Ω.
 6 Ω and 9 Ω.
 3 Ω and 9 Ω.
  1.5 Ω and 3 Ω.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The phase angle of current in respect of supply voltage will be

 32.1o.
 20.2o.
 40.4o.
 28.8o.

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the current in the circuit?

 0.4583 A.
 0.1465 A.
 0.1578 A.
 0.2547 A.

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