Charging by Induction
Charging by Induction
Purpose: To determine the kind of charge induced on a neutral object when it is approached by a charged object.
Materials: • metal-leaf electroscope • ebonite rod • fur • glass rod • silk • human finger (with body)
Procedure: 1. The metal-leaf electroscope was approached, but not touched, by a negatively charged ebonite rod. The rod was moved toward and away from the metal ball on the electroscope several times. Observations were recorded using diagrams. 2. Step 1 was repeated, using a positively charged glass rod. Observations were recorded using diagrams. 3. The metal-leaf electroscope was grounded by a human finger. A negatively charged ebonite rod was brought near the ball on the metal-leaf electroscope. While the charged rod was near the metal ball, the finger was removed. The ebonite rod was then taken away. Observations were recorded. 4. The kind of charge that was induced on the electroscope was predicted and tested. The electroscope was then discharged by touching the ball. Observations were recorded. 5. Predictions were made about what would happen if step 3 was repeated using a positively charged glass rod. The predictions were then tested, and observations were recorded.
Observations: 1. (refer to procedure 1) When the negatively charged ebonite rod approached the metal-leaf electroscope, the metal leaves moved away from each other.
2. (refer to procedure 2) When the positively charged glass rod approached the metal-leaf electroscope, the metal leaves moved away from each other.
3. (refer to procedure 3) While the finger was still on the metal ball, the negatively charged ebonite rod was brought near the same ball on the metal-leaf electroscope. As a result, nothing happened. The finger was then removed, followed by the removal of the ebonite rod. The metal leaves on the electroscope moved away from each other and remained apart until the electroscope was
Purpose: To determine the kind of charge induced on a neutral object when it is approached by a charged object.
Materials: • metal-leaf electroscope • ebonite rod • fur • glass rod • silk • human finger (with body)
Procedure: 1. The metal-leaf electroscope was approached, but not touched, by a negatively charged ebonite rod. The rod was moved toward and away from the metal ball on the electroscope several times. Observations were recorded using diagrams. 2. Step 1 was repeated, using a positively charged glass rod. Observations were recorded using diagrams. 3. The metal-leaf electroscope was grounded by a human finger. A negatively charged ebonite rod was brought near the ball on the metal-leaf electroscope. While the charged rod was near the metal ball, the finger was removed. The ebonite rod was then taken away. Observations were recorded. 4. The kind of charge that was induced on the electroscope was predicted and tested. The electroscope was then discharged by touching the ball. Observations were recorded. 5. Predictions were made about what would happen if step 3 was repeated using a positively charged glass rod. The predictions were then tested, and observations were recorded.
Observations: 1. (refer to procedure 1) When the negatively charged ebonite rod approached the metal-leaf electroscope, the metal leaves moved away from each other.
2. (refer to procedure 2) When the positively charged glass rod approached the metal-leaf electroscope, the metal leaves moved away from each other.
3. (refer to procedure 3) While the finger was still on the metal ball, the negatively charged ebonite rod was brought near the same ball on the metal-leaf electroscope. As a result, nothing happened. The finger was then removed, followed by the removal of the ebonite rod. The metal leaves on the electroscope moved away from each other and remained apart until the electroscope was