problems need solves

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ONH1111

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problems 2-6-12-14-19- only five problems that need to be solve

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Electronics Assignment

1

Q2. How many electrons does it take to make 80µC of charge?
Since, 1 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 = 6.24 × 1018 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
And 1 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 = 1 × 106 𝑚𝑖𝑐𝑟𝑜 𝑐𝑜𝑢𝑙𝑜𝑚𝑏𝑠
Therefore, 1 × 106 µ𝐶 = 6.24 × 1018 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
What about, 80µC=?
80µ𝐶 × 6.24 × 1018 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
= 4.992 × 1014 𝑒𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑠
6
1 × 10 µ𝐶
Q6. Five hundred joules of energy are used to move 100C through a resistor. What is the
voltage across the resistor?
From the definition that, voltage is the potential energy difference between two points that is
used to move 1 Joule of energy per coulomb, this can be represented by the equation;
1 𝑉𝑜𝑙𝑡 =
Therefore,

500 𝐽𝑜𝑢𝑙𝑒𝑠
100𝐶

1 𝐽𝑜𝑢𝑙𝑒
1 𝐶𝑜𝑢𝑙𝑜𝑚𝑏

= 5𝑉

Q12. Six-tenths coulomb passes a point in 3s. What is the current in Amperes?
From the definition, an ampere is one coulomb per second.
1𝐶

That is, 1𝐴 = 1 𝑠
Substituting in the equation,

0.6𝐶
3𝑠

= 0.2 �...


Anonymous
Really great stuff, couldn't ask for more.

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