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Electric Circuits

Electric Circuits
In the circuit given below the value of resistance Req is

 25 Ω.
 11.86 Ω.
 11.18 Ω.
 10 Ω.

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Electric Circuits
Image impedance can be written by using short circuit impedance(Zsc)and open circuit impedance(Zoc) as

 Zsc/Zoc
 Zsc+Zoc
 Zsc-Zoc
  (Zsc . Zoc)½

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Electric Circuits
A 35 V source is connected to a series circuit of 600 Ω and R as shown. If a voltmeter of internal resistance 1.2 kΩ is connected across 600 Ω resistor, it reads 5 V. The value of R is

 1.2 k Ω.
 2.4 k Ω.
 7.2 k Ω.
 3.6 k Ω.

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Electric Circuits
A parallel plate capacitor has a capacitance of C farad. It area of the plates is doubled and the distance between them is half, the capacitance of the capacitor is

 4C Farad.
 16C Farad.
 C Farad.
 2C Farad.

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Electric Circuits
If a resistor is connected across the voltage source and the frequency of voltage and current wave form is 50Hz, then what is frequency of instantaneous power

 150 Hz.
 100 Hz.
 50 Hz.
 0 Hz.

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Electric Circuits
During charging, the electrolyte of a lead acid battery becomes

 weaker.
 diluted with water.
 there is no change in electrolyte.
 stronger.

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MORE MCQ ON Electric Circuits

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