Hibah and Raya Physics Revision

What component is this and what does it do?

• Capacitor - stores electrical energy in an electrical field

• Variable resistor - controls a circuit's current

• LDR - a light bulb

• Resistor - stores electrical energy in an electric field

• LED - a light bulb

What happens to the potential difference in series circuits?

• Adds up to the potential difference across the battery

• Same as the potential difference across the battery

• Adds up to the potential difference across each branch

• Potential difference is not required in a series circuit

What happens if you add another branch to a parallel circuit?

• The total current decreases

• Everything increases by however many ammeters are present

• No change

• The current in the branches stays the same but the total current increases

What is the formula to measure resistance (with units)?

• Resistance (Ω)= potential difference (V) / current (A)

• Resistance (Ѡ)= potential difference (PD) / current (A)

• Resistance (V) = current (A) * potential difference (V)

• Resistance (I) = current (V) / potential difference (A)

What does the magnetic field of the earth resemble?

• Electric field

• Horseshoe magnet

• Bar Magnet

• Geographic North and South

How do you calculate speed?

• speed = distance * time

• speed = time / distance

• speed = distance / force

• speed = distance / time

How does pressure change when volume changes?

• Volume of container increases = pressure decreases

• Volume of container increases = pressure increases

• Pressure decreases = volume increases

• Volume does not affect pressure

Which of these can be compressed?

• Ice

• Water

• Water vapour

What are moments calculated in?

• M2 (Metres squared)

• Pa (Pascals)

• Nm (Newton Moments)

• Nm (Newton Metres)

What is conduction?

• Happens in solids - particles transfer energy in a current

• Happens in liquids - particles transfer energy through collisions

• Happens in solids - particles transfer energy through collisions

• Happens in liquids - particles transfer energy in a current