Part A A long wire is connected to the terminals of a battery. In 6.2 s , 9.6×10

Question

Part A

A long wire is connected to the terminals of a battery. In 6.2 s , 9.6×10^20 electrons pass a cross section along the wire. The electrons flow from left to right.

Determine the current in the wire.

Express your answer to two significant figures and include the appropriate units.

I =

Part B

A long wire is connected to the terminals of a battery. In 6.4 s, 9.6×10^20 electrons pass a cross section along the wire. The electrons flow from left to right.

Determine the current in the wire.

Express your answer to two significant figures and include the appropriate units.

I =

Part B

A long wire is connected to the terminals of a battery. In 6.4 s, 9.6×10^20 electrons pass a cross section along the wire. The electrons flow from left to right.

Determine the current in the wire.

Express your answer to two significant figures and include the appropriate units.

I =

Explanation / Answer

Current = Charge flowing per unit time.
Charge, Q = ne
n is the number of electrons passing through the wire, n = 9.6 x 1020.
e is the charge of electron, e = 1.6 x 10-19 C
Current = ne/t

Part A

time, t = 6.2 s

I = Q/t = ne/t
  = (9.6 x 1020 x 1.6 x 10-19 C ) / 6.2 s = 25 A.

Part B

time, t = 6.4 s

I = Q/t = ne/t
  = (9.6 x 1020 x 1.6 x 10-19 C ) / 6.4 s = 24 A.

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