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Electric Circuits

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

 -2A.
 2A.
 1A.
 -1A.

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Electric Circuits
Which of the following may be the value of resistivity of copper at absolute zero in ohm-metre?

 6.24.
 3.12.
 1.56.
 0.020.

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Electric Circuits
R1 = 36 Ω and R2 = 75 Ω, each having tolerance of ±5% are connected in series. The value of resultant resistance is

  111 ± 0 Ω.
  111 ± 5.55 Ω.
 111 ± 2.77 Ω.
 111 ± 7.23 Ω.

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Electric Circuits
Three element having conductance G1, G2 and G3 are connected in parallel. Their combined conductance will be

 G1 + G2 + G3.
 (G1 + G2 + G3) - 1.
 1 / G1 + 1 / G2 + 1 / G3.
 (1 / G1 + 1 / G2 + 1 / G3) - 1.

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Electric Circuits
Which cell has the reversible chemical reaction?

 Mercury oxide.
 Carbon Zinc.
 Lead acid.
 Silver oxide.

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Electric Circuits
The rms value of sinusoidal voltage wave V = 200sinω0t

 200 V.
 100√2 V.
 100 V.
 200√2 V.

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