Available Answers

1. 1.

   Choose the most appropriate answer.

   1. Which of the following is a magnetic material?
      1. Rubber
      2. Wood
      3. Plastic
      4. Iron
   2. The needle of a magnetic compass comes to rest in the
      1. north-south direction
      2. east-west direction
      3. north-east - south-west direction
      4. north-west - south-east direction
   3. The core of an electromagnetic is usually made of
      1. soft iron
      2. copper
      3. steel
      4. rubber
   4. Electric current is the flow of
      1. protons
      2. electrons
      3. neutrons
      4. none of these
   5. The SI unit to measure electric current is
      1. ampere
      2. volt
      3. ohm
      4. joules
   6. The current in a circuit is measured by a 
      1. voltmeter
      2. fuse
      3. ammeter
      4. resistance box
   7. A generator works on the principle of
      1. electromagnetic induction
      2. electromagnetic deduction
      3. electromagnetic conduction
      4. none of these
   8. Which of the following is found most suitable for making electric wires?
      1. Copper
      2. Silver
      3. Gold
      4. Carbon
2. 2.

   Fill in the blanks.

   1. Temporary magnets are usually made of ______________________.
   2. Magnetic poles cannot exist _______________________.
   3. ____________________ is the surest test for magnetism.
   4. An electromagnet is a ______________________ magnet.
   5. An electromagnet is used in ____________________ and ___________________.
   6. ______________________ cell is an example of a primary cell.
   7. Button cells are mostly used in __________________ and ____________________.
   8. In a household wiring system, appliances are usually connected in ________________ circuit.
3. 3.

   Define Magnetism.

4. 4.

   Define Electric current.

5. 5.

   Define Open circuit.

6. 6.

   Define Closed circuit.