DATE:
NAME:
UNIT 4
CLASS:
Charging by Contact and
Charging by Induction
BLM 4-14
Goal • To summarize charging an electroscope by contact and by induction.
1. a) Decide which sentence describes each part of the diagram below. Write the letter that each
sentence describes beside the sentence.
_____ The electroscope is not charged. Its leaves hang down.
_____ When a negatively charged rod touches the ball of the electroscope, some negative charges
move from the bar to the electroscope.
_____ When a positively charged bar touches the electroscope, some negative charges move from
the electroscope to the bar.
b) Add positive (+) and negative (–) charges to each diagram to match the descriptions.
c) Complete the title of the diagram.
Charging by ________________________________________________________
Science Links 9 Blackline Masters
BLM 4-14 Charging by Contact and Charging by Induction
Copyright © 2010 McGraw-Hill Ryerson Limited
978-0-07-031854-0
DATE:
NAME:
UNIT 4
CLASS:
Charging by Contact and
Charging by Induction
BLM 4-14
(continued)
2. a) Decide which sentence describes each part of the diagram below. Write the letter that each
sentence describes beside the sentence.
_____ The electroscope has not touched the bar, but it is now negatively charged.
_____ The negatively charged rod is brought close to the ball of the electroscope.
_____ When a finger touches the ball of the electroscope, some negative charges move from the
finger to the electroscope.
b) Add positive (+) and negative (–) charges to each diagram to match the descriptions.
c) Complete the title of the diagram.
Charging by ________________________________________________________
Science Links 9 Blackline Masters
BLM 4-14 Charging by Contact and Charging by Induction
Copyright © 2010 McGraw-Hill Ryerson Limited
978-0-07-031854-0