Electric Circuits (HSC SSCE Physics): Quizzes

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Electric Current
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What is electric current?

Flow of charged particles thru material

If 20 C of charge passes thru a point in 4.0 s, what is the current?

5.0 A

Which expression is equivalent to 1 ampere?

1 C s−11 \text{ C s}^{-1}

By convention, what does current direction represent?

Direction positive charges would move

Which THREE conditions are required for current flow?

Path, free charge carriers, applied force

Why do metals conduct electricity easily?

They have many free electrons

What is metallic bonding?

Bonding via sea of free electrons

How must an ammeter be connected in a circuit?

In series

What carries current in the human body?

Calcium and potassium ions

If 200 Ca2+\text{Ca}^{2+} ions move in 0.5 s, what is the current? (e=1.6×10−19e = 1.6 \times 10^{-19} C)

1.28×10−161.28 \times 10^{-16} A

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