Question

List out the required material to conduct an activity to understand the electrostatic force and write the procedure?​

Answer 1

Answer:

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:

• 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.

(a) 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.

(b) 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.

(a) Attach the ring stand and ring.

(b)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.

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

4. Observe how negatively charged objects interact. Record all of your observations.

(a) Charge the comb (–) and bring it near the polystyrene foam piece.

(b) Charge the comb (–) and bring it near the foil piece.

(c) Give both the polystyrene foam and the foil a negative (–) charge with the comb by touching them with a charged (–) comb.

(i) Re-charge the comb (–) and again bring it near the polystyrene foam and the foil.

(ii) Bring the charged polystyrene foam and foil as close as you can without touching.

(d) Discharge the polystyrene foam and foil by touching them with your hand.

5.Observe how positively charged objects interact. Record all of your observations.

(a) Charge the glass rod (+).

(b) Repeat procedures 3 c and d with the charged glass rod.

6. Observe how different positively and negatively charged objects interact. Record all of your observations.

(a) Give the foil a negative (–) charge with the comb and the polystyrene foam a positive (+) charge with the glass rod.

(b) Bring the polystyrene foam and foil as close together as you can without touching.

7. Observe how objects that are the same except for their charge interact. Record all of your observations.

(a) Replace the foil with a second piece of polystyrene foam.

(b) Give one of the polystyrene foam pieces a negative (–) charge with the comb and the second a positive (+) charge with the glass rod.

(c) Bring the two polystyrene foam pieces as close together as you can without touching.

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