Available Answers

1. 1.

   Match the following.

   Column I	Column II
   i. Ebonite rod	a. develop in insulators
   ii. Electroscope	b. higher potential to lower potential
   iii. Lightning conductor	c. nucleus
   iv. Induction	d. thunderstorm
   v. Neutrons	e. detects charges
   vi. Static charges	f. happens without contact
   vii. Conventional current	g. develops negative charges
   viii. Atmospheric charges	h. conducts atmospheric charges to be ground

    

2. 2.

   State whether the statements are true or false and correct the false statements.

   1. In insulators, the electrons are firmly bound to the atoms.
   2. Benjamin Franklin used a metallic thread to fly his kite.
   3. Electrically neutral atoms may have unequal protons and electrons.
   4. A glass rod will always retain its charges no matter how long it is left standing.
   5. The thread used by Benjamin Franklin could conduct charges in both dry and wet conditions.
   6. If the leaves of an electroscope diverge when a charged body is brought near it, it shows that the charges in the charged body are opposite to the charge of the electroscope.
   7. The experiment which Benjamin Franklin performed using a kite was dangerous as it involved a massive discharge of charges.
3. 3.

   Correlate the following:

   1. Electron : Outer orbit :: ___________ : Nucleus
   2. Conductors : Freely moving electrons :: Insulators : ____________
   3. Ebonite rod : Fur :: ______________ : Silk
   4. Rubbing of bodies : Charging by friction :: __________ : Charging by induction
4. 4.

   Choose the odd one out and give your reasons.

   1. Rubber, plastic, brass, ebonite
   2. Induction, friction, conduction
   3. Electron, nucleus, proton, neutron
5. 5.

   What is meant by static electricity?

6. 6.

   What are fundamental particles of an atom? Which particles are responsible for static electricity?