10th Standard CBSE - Science - Electricity

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Question - 1

Materials which allow larger current to flow through them are called

  • A Alloy
  • B Semiconductors
  • C Insulators
  • D Conductors

Question - 2

The unit of specific resistance is

  • A Ohm per meter
  • B Ohm
  • C Ohm per second
  • D Ohm meter

Question - 3

1 kilowatt hour (kWh) is equal to

  • A 3.6 \(\times\)106J
  • B 3.6 \(\times\)108J
  • C 3.6 \(\times\)102J
  • D 3.6 \(\times\)105J

Question - 4

The commonly used safety fuse wire is made of

  • A Lead
  • B Copper
  • C Nickel
  • D An alloy of tin and lead

Question - 5

Electric potential is

  • A Neither scalar nor vector
  • B Scalar quantity
  • C Vector quantity
  • D Sometimes scalar sometimes vector

Question - 6

Ohm's law is valid only when

  • A Graph between V and I is a straight line
  • B Temperature increases
  • C Temperature decreases
  • D Temperature remains constant.

Question - 7

If I is the current through a wire and 1 is the charge of electron, then no. of electrons in t seconds will be

  • A 1/It
  • B It/1
  • C \(\frac { 11 }{ t } \)
  • D It1

Question - 8

Electrical resistivity of a given metallic wire depends upon

  • A its length
  • B its thickness
  • C its shape
  • D nature of the material

Question - 9

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

  • A 1020
  • B 1016
  • C 1018
  • D 1023

Question - 10

What is the maximum resistance while can be made using five resistors each of 1/5\(\Omega \).

  • A 1/5\(\Omega \)
  • B 10\(\Omega \)
  • C 1/10\(\Omega \)
  • D 25\(\Omega \)