⚡️Physics⚡️

• What is the calculation for resistance?


  Resistance= potential difference/current
• What is the brown wire in a plug called?

  Live wire
• What is the blue wire in a plug called?

  Neutral wire
• What is the green and yellow wire called in a plug?

  Earth wire
• • What is a fuse?


  A safety device that protects electrical circuits from overloading.
• What does AC stand for?


  Alternating current
• What does DC stand for?


  Direct current
• What is the national grid?


  A network of power lines and substations that deliver electricity to homes and businesses.
• What is a step up transformer?


  Something that Increases voltages
• What is a step down transformer?


  Something that Decreases voltage
• What is the equation for charge?


  current x time
• What are the units for charge?


  Coulombs
• What is the equation for potential difference?


  Voltage= current x resistance
• What is the equation for power?


  Current x time
• What are the units for potential differenc?


  Volts
• What are the units for power?


  Watts
• What is the other equation for power?


  Current^2 x Resistance
• What is the equation for energy transferred? 


  Potential difference x charge
• What are the units for energy transferred?


  Joules
• What is electric current?


  Flow of electric charge (Electrons)
• What is potential difference?


  difference in charge that pushes the electrons around the circuit
• What is resistance?


  A stopping force
• What is a series circuit?


  A circuit where the components are connected in a single path, allowing the flow of current through each component one after another.
• What is a parallel circuit?


  A circuit with multiple paths for current to flow.
• What is Ohms law?

  Current is directly proportional to voltage
• How do you calculate the total of 2 resistors in a series circuit?

  R1+R2
• How do you calculate the total of 2 resistors in a parallel circuit?

  1/R1 + 1/R2
• What is an LDR?

  Light Dependent Resistor
• What is a Thermistor?

  Temperature-sensitive resistor
• What is the vol of the neutral wire?

  Zero
• What is the purpose of the earth wire?

  Safety
• What produces AC?


  Plugs
• What produces DC? 


  Batteries
• Why are there high voltage pylons in the national grid?

  more efficiency and less energy loss
• What are the benefits of having the national grid?

  Efficiency, reliability, flexibility, less power cuts, supply matched to demand.
• What is the independent variable?

  The thing you change
• What is the dependent variable? The thing you measure
• What is the control variable?

  The thing you keep the same
• Open switch

  
• Closed switch