Circuits

Question 1

Define conventional flow

Answer 1

Cathode (+) to anode (-) flow. Reverse flow of electrons.

Question 2

What is a voltage drop?

Answer 2

A drop in voltage electrons experience when they pass through resistance.

Question 3

Why are voltmeters placed in parallel?

Answer 3

Kirchhoff’s Voltage Law states that voltage is constant in parallel. Voltmeters also require near infinite resistance, in order to minimize interference with the circuit.

Question 4

Why are ammeters placed in series?

Answer 4

Kirchhoff’s Current Law states that current is constant in series. In order to minimize interference, the ammeter must have near infinitesimal resistance and be placed in series, to leave current unaffected.

Question 5

What conservation law is Kirchhoff’s Current Law caused by?

Answer 5

Conservation of Electric Charge

Question 6

What conservation law is Kirchhoff’s Voltage Law caused by?

Answer 6

Conservation of Energy

Question 7

Formula for current is…

Answer 7

I = Q/t

Question 8

What is Kirchhoff’s Voltage Law?

Answer 8

The conservation of energy implies the sum of all voltage drops around any closed loop is zero.
V - V1 - V2 - V3 = 0

Question 9

What is Kirschhoff’s Current Law?

Answer 9

The conservation of electric charge implies that at any junction, the sum of currents flowing into that junction is equal to the sum of currents flowing out of it.
I1 + I2 = I3 + I4

Question 10

5.0 - 4.1 = 0.9
This is incorrect. How many significant digits (SD) should the answer have?

Answer 10

Two SD: 0.90

Question 11

What are batteries made of

Answer 11

Electrodes (Cathode (–), Anode (+)), electrolyte, and a separator.