A negatively-charged balloon is brought near to (without touching) a neutral ele

Question

A negatively-charged balloon is brought near to (without touching) a neutral electroscope. With the negatively-charged balloon held near, the electroscope is momentarily touched by a hand (ground). The balloon Is then removed and the foils deflect, thus showing a charge. Which of the following statements is true of the charged electroscope? The electroscope was charged by the method of induction. The charge on the electroscope is the same type of the charge on the balloon. The electroscope has more electrons than protons. The electroscope gained protons during the charging process. If a positively charged plate is brought near the top of a positively-charged electroscope, then the Mylar foil pair will: Not Move Move away from each other Move Towards each other Electric Fields always run Parallel along Lines of Equal Potential True False The magnitude of an electric field between two differentially charged infinite plates: Falls off at 1/r Falls off at 1/r^2 Is Constant Is Zero In Today's Lab you will experimentally determine the relationship between voltage, current, and resistance in Osmic and non-Osmic devices. In the introduction to the lab, the manual clearly states that: Voltage flows through a complete circuit Current flows through a complete circuit Both voltage and current flow through a complete circuit Neither voltage nor current flow through a complete circuit

Explanation / Answer

1)

as the electroscope is charged without touching it with a charged object

the correct option is a

2)

as both the foils will have same charge

b)

3)

False , electric field lines are perpendicular to lines of equipotential

4)

as the electric field between to infinite charged plates is = sigma/epsilon

the correct option is c)

5)

voltage is applied and current flows in the circuit

option b

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