Electricity And Properties of Matter

Question 1

What are the Series Circuit Rules?

Answer 1

Voltage - Vs = V1 + V2…

Current - Is = I1 = I2…

Resistance - Rt = R1 + R2…

Question 2

What are the Parallel Circuit Rules?

Answer 2

Voltage - Vs = V1 = V2…

Current - Is = I1 + I2…

Resistance - 1/Rt = 1/R1 + 1/R2…

Question 3

What is a Capacitor?

Answer 3

Used to store charge. When a capacitor is connected to a battery the voltage across the capacitor cannot exceed the battery voltage.

Question 4

What is a Thermistor?

Answer 4

As the temperature goes up the resistance goes down. it is a temperature dependant resistor.

Question 5

What is a Light Dependant Resistor (LDR)

Answer 5

As the light level goes up the resistance goes down

Question 6

What are the Two types of Transistors?

Answer 6

NPN Transistor - Turns on at 0.7V

MOSSFET Transistor - Turns on at 2V

Question 7

State the 4 Equations used to find Power

Answer 7

P = E / t

P = V2 / R

P = I x V

P = I2 x R

Question 8

What is Specific Heat Capacity

Answer 8

Specific heat capacity is the amount of heat required to increase the temperature of a 1kg mass by 1 degree

Question 9

What is the Equation for Specific Heat Capacity?

Answer 9

Eh = cm x change in temperature

Eh = Heat Energy (J)
c = Specific Heat Capacity (J/kgC)
m = Mass (kg)

Question 10

What is Latent Heat?

Answer 10

Heat energy that is taken in or given out by a substance when it changes state is called latent heat

Question 11

What is the Equation for Latent Heat?

Answer 11

Eh = m x l

Eh = Heat Energy (J)
m = Mass (kg)
l = Latent Heat (Jkg-1)

Question 12

Pressure Relationships with Temperature and Volume

Answer 12

Pressure is indirectly proportional to Volume. ( As volume increases pressure decreases)

Pressure us directly proportional to Temperature. ( As temperature increases pressure increases)