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Electric Circuits

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

  2.
 0.25.
  0.5.
 4.

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Electric Circuits
One atomic mass unit ( amu ) is approximately equal to

 1.6 × 10-13 Kg.
 1.6 × 10-24 Kg.
  1.6 × 10-27 Kg.
 1.6 × 10-19 Kg.

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Electric Circuits
What is called the frequency in AC operation?

 No. of wave made per second.
 No. of (+) ve quadrature made per second.
 No. of (-) ve quadrature made per second.
 No. of cycles made per second.

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Electric Circuits
When a lossy capacitor with a dielectric of permittivity ε and conductivity σ operates at a frequency ω the loss tangent for the capacitor is given by

 ω ε/σ.
  σ/ω ε.
 ω σ/ε.
 σ ω ε.

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Electric Circuits
Which of the following is not equivalent to watts?

 Ampere-volts.
 Ampere2 – Ohm.
 Amperes/volt.
 Joules per second.

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Electric Circuits
Which cell has the reversible chemical reaction?

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

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MORE MCQ ON Electric Circuits

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