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Electric Circuits

Electric Circuits
The life of a lead acid battery is expected to be

 2 to 5 years.
 1 year.
 6 months.
 10 to 15 years.

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Electric Circuits
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 200 Ohms.
 50 Ohms.
 100 Ohms.
 25 Ohms.

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Electric Circuits
Which field is associated with the capacitor?

 None of above.
 Both of (A) and (B).
 Electric.
 Magnetic.

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Electric Circuits
What is mean by flow of electrons?

 Voltage.
 Electric current.
 Semiconductor.
 Insulator.

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Electric Circuits
The mass of the atom is determined by

 electron and proton.
 neutron and proton.
 electrons.
 proton.

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Electric Circuits
The hot resistance of a tungsten lamp is about 10 times the cold resistance. Accordingly, cold resistance of a 100 W, 200 V lamp will be

 800 Ω.
 4 Ω.
 400 Ω.
  40 Ω.

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