# If a charged sphere is brought close to a rod as shown in Figure A, the pairs of pith balls suspended at the ends of the rod will

as the figure im reading is showing there is a charged sphere to the left then a induced charged on the rob which the pith balls are hanging from

A.move away from each other.

B.pull closer to each other.

C.drop off the rod.

D.discharge static onto the sphere

What color band markings would be seen on a 2.2k

Ω resistor?

A.Black, black, orange

C.Red, red, orange

B.Red, red, red

D.Orange, red, red

## A

B

## D

B

## For the first question:

When a charged sphere is brought close to a rod, the pairs of pith balls suspended at the ends of the rod will experience an induced charge. In this case, the charged sphere is to the left of the rod.

Since like charges repel each other, the pith balls, which are charged similarly to the sphere, will move away from each other. Therefore, the correct answer is:

A. Move away from each other.

For the second question:

The band markings on a resistor indicate its resistance value. To determine the value, you need to know the color codes commonly used on resistors.

In this case, the color band markings mentioned are:

2 (black), 2 (black), followed by a multiplier of 10^(3) (orange).

To determine the value, we combine the first two colors (black and black) to get the two significant digits (22). Then we multiply this value by the multiplier (orange), which signifies 10^(3) or 1000.

Therefore, the correct answer is:

A. Black, black, orange, indicating a resistance value of 22 kilohms (kΩ).

## To answer the first question, we need to understand the concept of electric charge and induction. When a charged sphere is brought close to a neutral conductor, such as the rod in this case, the charges in the conductor redistribute themselves due to the influence of the charged sphere. This redistribution of charges is called induction.

As a result of induction, the end of the rod closest to the charged sphere becomes oppositely charged, while the end farthest from the charged sphere becomes similarly charged. This means that the end of the rod close to the charged sphere will attract the pith balls hanging from it, while the end farthest from the charged sphere will repel the pith balls.

Therefore, in this scenario, the pairs of pith balls suspended at the ends of the rod will move away from each other. So, the correct answer is option A: move away from each other.

Moving on to the second question, the color band markings on resistors are used to represent the resistance value and tolerance. The standard color-coding scheme for a 3-band resistor consists of the following colors:

- The first band represents the first digit of the resistance value.

- The second band represents the second digit of the resistance value.

- The third band represents the multiplier (power of 10) to determine the resistance value.

Given the options provided:

A. Black, black, orange

B. Red, red, red

C. Red, red, orange

D. Orange, red, red

We can decode the colors in the second option as: red (2nd band: 2), red (1st band: 2), red (multiplier: 1000). Combining these values, we get 22 x 1000 = 22,000 ohms.

Therefore, the correct answer is B: Red, red, red.