1. If a glass rod were rubbed with silk and a plastic rod with wool, how would a. the glass react with the plastic rod? Why? b. the glass react with the wool? Why? c. the silk react with the wool? Why? d. the plastic rod react with the silk? Why? 2. When a Ping-Pong ball is made to touch a charged plastic rod, it is first attracted and then repelled. Why? 3. An electroscope is charged by induction with a plastic rod rubbed With wool. a. What is the charge on the electroscope? b. A glass rod rubbed with silk is placed near the knob of the electroscope. The metal foils diverge further apart. Why? c. An object is placed near the knob of the electroscope. The metal foils collapse. What is the charge of the object? Why? d. An object placed near the knob of the electroscope does not affect the leaves of the metal foils. What is the charge of the object? Why? 4. Given several resistances, how could you connect them if a. You wish to increase the current? b. You want a decrease in total resistance without reducing the number of resistors? c. You want to reduce your current?
1. If a glass rod were rubbed with silk and a plastic rod with wool, how would
a. the glass react with the plastic rod? Why?
b. the glass react with the wool? Why?
c. the silk react with the wool? Why?
d. the plastic rod react with the silk? Why?
2. When a Ping-Pong ball is made to touch a charged plastic rod, it is first attracted and then repelled. Why?
3. An electroscope is charged by induction with a plastic rod rubbed With wool.
a. What is the charge on the electroscope?
b. A glass rod rubbed with silk is placed near the knob of the electroscope. The metal foils diverge further apart. Why?
c. An object is placed near the knob of the electroscope. The metal foils collapse. What is the charge of the object? Why?
d. An object placed near the knob of the electroscope does not affect the leaves of the metal foils. What is the charge of the object? Why?
4. Given several resistances, how could you connect them if
a. You wish to increase the current?
b. You want a decrease in total resistance without reducing the number of resistors?
c. You want to reduce your current?
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