CBSE  /  Class 10  /  Science  /  Electricity

  • 1. 
    Unit of electric power may also be expressed as

  • volt ampere
  • kilowatt hour
  • watt second
  • Joule second

  • 2. 
    Electrical resistivity of a given metallic wire depends upon

  • its length
  • its thickness
  • its shape
  • nature of the material

  • 3. 
    A cell, a resistor, a key and ammeter are arranged as shown in the circuit diagrams of Figure (i), (ii) and (iii). The current recorded in the ammeter will be

  • maximum in (i)
  • maximum in (ii)
  • maximum in (iii)
  • the same in all the cases

  • 4. 
    The unit of e. m. f. of a cell is

  • dyne
  • volt
  • ampere
  • joule

  • 5. 
    Kilowatt hour is the unit of

  • power
  • energy
  • impulse
  • force

  • 6. 
    1 kWh is equal to

  • 3. 6 × 10
  • 3. 6 × 10
  • 3. 6 × 10² MJ
  • 3. 6 MJ

  • 7. 
    Materials which allow larger currents to flow through them are called

  • insulators
  • conductors
  • semiconductors
  • alloys

  • 8. 
    Conventionally, the direction of the current is taken as

  • the direction of flow of negative charge
  • the direction of flow of atoms
  • the direction of flow of molecules
  • the direction of flow of positive charge

  • 9. 
    The unit of specific resistance is

  • ohm
  • ohm
  • ohm-metre
  • ohm per metre

  • 10. 
    The slope of voltage (V) versus current (I) is called

  • resistance
  • conductance
  • resistivity
  • conductivity
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