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Electric Circuits

Electric Circuits
A 6 V lead acid battery has an internal resistance of 0.01 Ω. How much current will flow when the battery is short circuited?

 6 A.
 100 A.
 600 A.
 1 A.

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Electric Circuits
A voltage source having an open circuit voltage of 100 V and internal resistance of 50 Ω is equivalent to a current source

 0.5 A in parallel with 50 Ω.
 none of these.
 2 A with 50 Ω in parallel.
 2 A with 50 Ω in series.

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Electric Circuits
The delta equation of given star connected impedance ZQR is equal to

  (10 + j30) Ω.
 (20 + j10) Ω.
 (5 + j10 / 3) Ω.
 40 Ω.

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Electric Circuits
To reduce hysteresis loss, we use

 copper bars.
 laminated sheets.
 soft-iron.
 CRGO steel.

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Electric Circuits
A current is said to be alternating when it changes in

 none of these.
 direction.
 magnitude.
 both ‘a’ and ‘b’.

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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.
 ω σ/ε.
 σ ω ε.
  σ/ω ε.

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