1. Inflate the two balloons. Tie each using a length of string. Place the meter-long
stick across two chairs. Suspend the two balloons so that they hang freely
about two inches apart.
2. With each hand holding one balloon, rub the balloons simultaneously against
your hair several times. Let go of the balloons. Observe.
Q1. What happened with the balloons?
Q2. Did the balloons acquire the same charge or different charges? What made
you say so?
3. Rub the piece of glass with a silk cloth. Bring the piece of glass between the
two balloons. Observe.
Q3. What happened with the balloons?
Q4. Does the glass have a different or same charge as the balloon? What made
you say so?
stick across two chairs. Suspend the two balloons so that they hang freely
about two inches apart.
2. With each hand holding one balloon, rub the balloons simultaneously against
your hair several times. Let go of the balloons. Observe.
Q1. What happened with the balloons?
Q2. Did the balloons acquire the same charge or different charges? What made
you say so?
3. Rub the piece of glass with a silk cloth. Bring the piece of glass between the
two balloons. Observe.
Q3. What happened with the balloons?
Q4. Does the glass have a different or same charge as the balloon? What made
you say so?
Answers & Comments
Answer:
A1. The balloons repelled each other and moved away from each other.
A2. The balloons acquired the same charge as they repelled each other.
A3. The balloons moved towards the glass and then moved away from each other.
A4. The glass acquired a different charge as compared to the balloon, as it attracted the balloons towards itself, indicating an opposite charge.