Exam 11 Part 2

Physics/D'Amato 2007 Unit 11 Electric Charge Name ____________________________________ Period ___ Unit 11 Exam Part 2 Explain the behavior of a charged electroscope using the principles of charge and conductors. 1a. Initial state: a neutral electroscope, indicator is down

1b. Explain final state: electroscope has been touched with negatively charged rod, indicator is up

Count the charges in the electroscope Number of negative charges shown: _____ Number of positive charges shown: _____ Net charge shown on electroscope: _____

The electroscope now has a net charge of -4. Draw the negative charges on the electroscope Number of negative charges shown: _____ Number of positive charges shown: _____ Net charge shown on electroscope: _____ Why is the indicator staying up?

2a. Explain experiment 2 initial state: negatively charged electroscope, rod not nearby, indicator is up

2b. Explain final state: negatively charged electroscope, negative rod below, indicator is down

Draw the charges on a negative electroscope from 1b Negatively charged rod

Draw the electroscope with the same net charge as in 1b Number of negative charges shown: _____ Number of positive charges shown: _____ Net charge shown on electroscope: _____

Draw the negative charges in the electroscope. Net charge shown on electroscope: _____ Did the net charge on the electroscope change? continued …

Physics / Chris D'Amato PTHS 2007

Physics/D'Amato 2007 Unit 11 Electric Charge 3a. Initial state: negatively charged electroscope, rod not nearby, indicator is up

3b. Explain final state: negatively charged electroscope, negative rod above, indicator is farther up Negatively charged rod

Draw the electroscope with the same net charge as in 1b Net charge shown on electroscope: _____

Draw the negative charges in the electroscope. Net charge shown on electroscope: _____

4a. Initial state: negatively charged electroscope, rod not nearby, indicator is up

4b. Explain final state: positive rod above, indicator is down

Positively charged rod

Draw the electroscope with the same net charge as in 1b Net charge shown on electroscope: _____

Draw the negative charges in the electroscope. Net charge shown on electroscope: _____

5a. Initial state: negatively charged electroscope, rod not nearby, indicator is up

5b. Explain final state: positive rod below, indicator is farther up

Positively charged rod

Draw the electroscope with the same net charge as in 1b Net charge shown on electroscope: _____

Physics / Chris D'Amato PTHS 2007

Draw the negative charges in the electroscope. Net charge shown on electroscope: _____