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Kay [80]
1 year ago
12

Hello people~

Physics
2 answers:
Wewaii [24]1 year ago
5 0

Answer:

A or B

<em><u>(a) is always at +ve potential.</u></em>

<em><u>(b) is always at zero potential.</u></em>

Explanation:

<em><u>reason </u></em>

  • <em><u>a </u></em><em><u>conductor</u></em><em><u> </u></em><em><u>with </u></em><em><u>positive</u></em><em><u> </u></em><em><u>charge </u></em><em><u>is </u></em><em><u>always </u></em><em><u>positive</u></em><em><u> </u></em><em><u>and </u></em><em><u>zero </u></em><em><u>potential</u></em>

<em><u>h</u></em><em><u>ope </u></em><em><u>it's</u></em><em><u> helpful</u></em>

galina1969 [7]1 year ago
4 0

Answer:

B

Explanation:

Let's see the formula

  • V=kq/r

If q is positive it yeilds V or potential as positive hence it is at zero potential

Option B is correct

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The formula for the period of wave is: wave period is equals to 1 over the frequency.waveperiod=\frac{1}{frequency}
To get the value of period of wave you need to divide 1 by 200 Hz. However, beforehand, you have to convert 200 Hz to cycles per second. So that would be, 200 cyles per second or 200/s.
By then, you can start the computation by dividing 1 by 200/s. Since 200/s is in fractional form, you have to find its reciprocal form and multiply it to one which would give you 1 (one) second over 200. This would then lead us to the value 0.005 seconds as the wave period.

wave period= 1/200 Hz
Convert Hz to cycles per second first
200 Hz x 1/s= 200/second
Make 200/second as your divisor, so:

wave period= 1/ 200/s

get the reciprocal form of 200/s which is s/200

then you can start the actual computation:

wave period= 1 x s divided by 200

this would give us an answer of 0.005 s. 
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