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Electric Circuits

Electric Circuits
A 10Ω resistor is stretched to increase its length double. Its resistance will now be

 10 Ω.
 20 Ω.
 40 Ω.
 5 Ω.

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 42.4sin50πt.
 30sin50πt.
 42.4sin25πt.
 30sin25πt.

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Electric Circuits
Ampere second is the unit of

 energy.
 conductance.
 power.
 charge.

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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 σ/ε.
 ω ε/σ.
  σ/ω ε.
 σ ω ε.

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Electric Circuits
Which of the following is the different one in terms of measurements?

 Q
 L/R
 2L/R
 RC

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Electric Circuits
Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be

 0.25.
 2.
 0.5.
 4.

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