BWS AQA Physics Electricity Ohm's Law

What is Resistance?

• The flow of electrons
• Electric potential difference
• A battery
• The ability to reduce the flow of electrons

What is resistance measured in?

• Ω (Ohms)
• V (Volts)
• A (Amps)
• W (Watts)

The mathematical relationship between Current, Voltage and Resistance

• Faraday's Law

• Coulomb's Law

• Edison's Law

• Ohm's Law

How do you calculate voltage?

• Current X Resistance
• Resistance ÷ Current
• Current ÷ Resistance
• Measure it with a ruler

Tags

NGSS.HS-PS2-4

How do you calculate current

• Resistance X Voltage
• Voltage X Resistance
• Resistance ÷ Voltage
• Voltage ÷ Resistance

How do you calculate resistance?

• Voltage X Current
• Current ÷ Voltage
• Voltage ÷ Current
• Current X Amps

What voltage is needed to cause a 2A current flow through a 10Ω resistor?

• 5V
• 0.2V
• 20V
• 200V

What voltage is needed to cause a 5A current flow through a 2Ω resistor?

• 10V
• 2.5V
• 7V
• 0.4V

What voltage is needed to cause a 50A current flow through a 10Ω resistor?

• 15V
• 500V
• 500 kV
• 0.2V

What resistance is needed to cause a 50A current flow because of a 500V battery?

• 10Ώ
• 5Ώ
• 2500Ώ
• 550Ώ