Kirchhoff's current law is based on the conservation of from Sci

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Sarika took distilled water in a bottle and tried to find whether it conducts electricity or not. What is she likely to find?

  • It is good conductor of electricity

  • It is an insulator

  • It is poor conductor of electricity

  • None of the above


2.

Which one of the following statements is not correct?

  • There is a maximum limit of current which can safely flow in the electric circuit.

  • Fuses are inserted in electric circuits of all the buildings

  • If the proper fuse is inserted in a circuit, it will blow off, if the current is more than the safe limit.

  • There is a minimum limit of current which can safely flow in the electric circuit.


3.

Which one of the following materials is ferromagnetic?

  • Nickel

  • Wood

  • Gold

  • Manganese


4.

When a glass rod is rubbed with silk, then which type of charge is created on it?

  • Positive charge

  • Negative charge

  • Electric charge

  • None of these


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5.

Mica is used in cooking utensils because it is

  • good conductor of heat but bad conductor of electricity

  • bad conductor of heat but good conductor of electricity

  • good conductor of both heat and electricity

  • bad conductor of both heat and electricity


6.

The angle of dip at magnetic pole of earth is



  • 45°

  • 90°

  • 135°


7.

In household wiring, what is the colour of 'earth wire'?

  • Red

  • Green

  • Black

  • White


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8.

Kirchhoff's current law is based on the conservation of

  • energy

  • momentum

  • charge

  • mass


C.

charge

Kirchhoff's current law or junction rule states that "at any junction, the sum of the currentsentering the junction is equal to the sum of currents leaving the junction". This law is based on the conservation of charge.


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9.

Who discovered X-rays?

  • Roentgen

  • Maxwell

  • Rutherford 

  • Torricelli


10.

A battery of 15 V is connected to a parallel group of resistance of 4, 10 and 20 Ω. The current in the circuit will be

  • 6 A

  • 4 A

  • 8 A

  • 2 A


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