Available Answers

1. 1.

   Tick (√) the correct options:

   1. How many terminals are there in an electric cell?
      1. 2
      2. 3
      3. 4
      4. 5
   2. Which is not the source of electricity?
      1. generator
      2. power station
      3. battery
      4. fan
2. 2.

   Tick (√) the correct options:

   1. Electric current flows only when the circuit is ________________.
      1. open
      2. closed
      3. incomplete
      4. broken
   2. Which of the following is not an insulator?
      1. rubber
      2. wood
      3. copper
      4. plastic
3. 3.

   Tick (√) the correct options:

   1. Tiny thin inside the bulb is called ________________.
      1. element
      2. filament
      3. circuit
      4. thread
   2. The flow of electricity is known as electric ________________.
      1. energy
      2. power
      3. generator
      4. current
   3. The energy provided by electricity is called ________________ energy.
      1. electrical
      2. chemical
      3. solar
      4. physical
   4. The electric circuit which is not complete is called ________________ circuit.
      1. open
      2. closed
      3. short
      4. universal
   5. The device that is used to open or electric circuit is an ________________.
      1. electric bulb
      2. electric gadget
      3. electric switch
      4. electric cell
   6. When the switch of an electric torch is pushed to the 'on' position, the circuit is ________________.
      1. incomplete
      2. open
      3. complete
      4. none of these
4. 4.

   Look at the figures given alongside and tick(√) the correct options:

     

   1. In Fig. (a), the bulb does not glow because
      1. both wires are not intact.
      2. both wires are intact.
      3. wire 1 is broken.
      4. wire 2 is broken.
   2. In Fig. (b) ,
      1. the bulb will glow.
      2. the bulb will not glow.
      3. the bulb will glow for some time.
      4. the bulb will fuse.
   3. In Fig. (c),
      1. the bulb will glow.
      2. thee bulb will not glow.
      3. the bulb will glow for some time.
      4. the bulb will fuse
5. 5.

   Fill in the blanks:

   1. _______________ is a source of electricity.
   2. An electric bulb glows, when _______________ passes through it.
   3. An electric cell has _______________ terminals.
   4. A bulb in which the filament is broken is called ______________ bulb.
   5. _______________ is used too break a circuit.
6. 6.

   State whether the following statements are true (T) or false (F). Rewrite the false statements correctly:

   1. Electric cells have chemicals stored inside them.
   2. A fused bulb lights up, when current passes through its filament.
   3. Electric cells supply a steady electric current.
   4. An electric switch is used to open or close an electric current.
   5. The path along which an electric current can flow is called an 'electric circuit' or 'circuit'.