Correct Answer: B. direction of current

Explanation

No explanation is available for this question at this moment. If you can provide an explanation to help other student learn, please click on the post explanation link below.

Correct Answer: A. 2.25 x 10^-17F

Explanation

C = \(\frac{{\varepsilon}_oA}{d}\)

= \(\frac{5{\times} 10^{-8} {\times} 10^{-12}{\times} 9}{2 {\times}10^{-3}}\)

= 22.5 x 10^-17F

Correct Answer: A. 1.2\(\Omega\)

Explanation

R = \(\frac{v}{I}\)

= \(\frac{120}{100}\)

= 1.2\(\Omega\)

Correct Answer: C. Gold Leaf Electroscope

Explanation

A gold leaf electroscope consists of two thin gold leaves that are attached to a metal rod inside a glass or plastic enclosure. When a charged object is brought near the metal rod, it induces a charge on the leaves. The leaves, being like charges, repel each other and spread apart. By observing the degree to which the leaves separate, you can compare the relative magnitudes of charges on different bodies. This makes a gold leaf electroscope a valuable tool for demonstrating the presence and relative strength of electric charges.