Book 1 Chapter 2 - current and voltage rules

Question 1

Current rule for series circuits

Answer 1

Current in a series circuit is the same everywhere.

Question 2

Current rule for parallel circuits

Answer 2

The current in a parallel circuit splits at a junction and then rejoins at a different part of the circuit and returning to the same current.

Question 3

How many uA and in 1 mA

Answer 3

1000

Question 4

Voltage rule for series circuit

Answer 4

The voltage in a series circuit splits across each component in the circuit and the sum of the voltages is equal to that of the voltage in the power supply/battery.

Question 5

Voltage rule for parallel

Answer 5

The voltage across components in parallel is the same

Question 6

Potential divider equation

Answer 6

R2/R1+R2 x Vin

Question 7

Power equations

Answer 7

P = IV , P=V squared/R, P = I squared x R

Question 8

Voltage equation

Answer 8

V = IR

Question 9

What is the current voltage characteristic for a resistor

Answer 9

A linear line through the origin

Question 10

What is the current voltage characteristic for a diode

Answer 10

0V before 0.7V as a diode doesn’t allow current to flow in the other direction. The saturation voltage is 0.7V and it allows current to flow past this point.

Question 11

What is the current voltage characteristic for a lamp

Answer 11

It’s non linear because the filament gets hotter with increased current this causes a higher resistance so it’s non linear.