Question

describe an activity that gives an understanding of 'electostatic force'​

Answer 1

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Explanation:

Materials :-

• Hard-rubber comb
• Glass rod
• Piece of silk or nylon
• Two pieces of polystyrene foam
• Two pieces of string or thread
• Ring stand and ring
• Aluminum foil
• Paper
• Towel

Procedure

Safety Note: Electrostatic forces are very sensitive to the environment. As you conduct this activity, be careful not to get fingerprints on the materials. Do not allow the materials to touch your clothing. Make sure classroom windows are closed. Because humidity greatly affects electrostatic forces, conduct the activity in an air-conditioned room. Do not conduct this activity on a metal table. You may have to repeat each step several times, taking these precautions each time.

Clean the hard-rubber comb and glass rob. Remove all of the water with a towel.

Tear up the paper into tiny pieces. Make a small pile of the pieces of paper.

Produce a negative (–) charge on the comb by rapidly passing it through dry, greaseless hair (straight hair works best). Bring the charged comb near the pile. Record what you observe.

Produce a positive (+) charge on a glass rod by rapidly rubbing it with silk or nylon. Bring the charged rod near the pile. Record what you observe.

Set up the ring stand and hanging objects.

Attach the ring stand and ring.

Tie one of the pieces of polystyrene foam to a piece of string. Tie a small strip of aluminum foil to the other piece of string.

Tie the strings to opposite sides of the ring. The objects should hang at the same height.

Answer 2

Answer:

The electrostatic force is also known as the Coulomb force or Coulomb interaction. It's the attractive or repulsive force between two electrically charged objects. Like charges repel each other while unlike charges attract each other. Coulomb's law is used to calculate the strength of the force between two charges.