Question

Investigation A. The pith ball Electroscope

The pith ball electroscope consists of a light, conducting pith ball suspended from a support by means of an insulating string.

1 A. Ground the pith ball by touching it.

   B. Rub a rubber rod with wool of fur and bring it near the pith ball

    C. Remove the rod

2    A. Ground the pith ball.

     B. Rub a glass rod with silk and bring it near the pith ball.

     C. Remove the rod

3   A. Ground the pith ball.

     B. Bring a negatively charged rod near the pith ball.

    C. Touch the pith ball with the rod

4   A. Charges the pith ball as in 3, by contact.

     B. Bring a negatively charged rod near the pith ball.

     C. Removes the rod.

5   A. Charge the pith ball as in 3, by contact.

     B. Bring a positively charged rod near the pith ball.

     C. Remove the rod.

Please explain each situation!!~Thankyou

Answer 1

1 A. Ground the pith ball by touching it.

   B. Rub a rubber rod with wool of fur and bring it near the pith ball

    C. Remove the rod

Explaination:

A. Pith ball is neutral

B.Rubber rod becomes negatively charged, +ve ions of pith ball are attracted to it.

C. Pith ball remains neutral

2    A. Ground the pith ball.

     B. Rub a glass rod with silk and bring it near the pith ball.

     C. Remove the rod

Explaination:

A. Pith ball is neutral

B.Rubber rod becomes positively charged, -ve ions of pith ball are attracted to it.

C. Pith ball remains neutral

3   A. Ground the pith ball.

     B. Bring a negatively charged rod near the pith ball.

    C. Touch the pith ball with the rod

Explaination

A. Pith ball is neutral

B. +ve ions of pith ball are attracted to rod

C. Pith ball becomes negatively charged due to tranfer of electrons

4   A. Charges the pith ball as in 3, by contact.

     B. Bring a negatively charged rod near the pith ball.

     C. Removes the rod.

Explaination
A. Pith ball is negatively charged.

B. -ve ions of pith ball are attracted to rod

C. Pith ball remains negatively charged.

.

5   A. Charge the pith ball as in 3, by contact.

     B. Bring a positively charged rod near the pith ball.

     C. Remove the rod.

Explaination

A. Pith ball is negatively charged.

B. +ve ions of pith ball are attracted to rod

C. Pith ball remains negatively charged.