GCSE and A-Level Physics Practice Questions: Electrical Charges and Circuits, Lecture notes of Acting

Download GCSE and A-Level Physics Practice Questions: Electrical Charges and Circuits and more Lecture notes Acting in PDF only on Docsity!

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

• Electricity Contents
  • Equations
  • Static electricity
  • Electric fields
  • Circuit Symbols and Current
  • Series and parallel
  • Current, Voltage and Resistance.
  • Ohmic conductors and semiconductors.........................................................
  • Sensor circuits
  • AC and DC................................................................................................
  • Plugs and the earth wire
  • Power, energy and charge
• Electricity Answers
  • Static electricity answers
  • Electric fields answers
  • Circuit symbols and current answers............................................................
  • Series and parallel answers
  • Current, voltage and resistance answers
  • Ohmic conductors and semiconductors answers.
  • Sensor circuits answers
  • AC and DC answers
  • Plugs and the earth wire
  • Power, energy and charge answers..............................................................

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Static electricity

Knowledge Checklist

Specification statement These are the bits the exam board wants you to know, make sure you can do all of these… Self-assessment First review 4 - 7 months before exam Second review 1 - 2 months before exam Final review 1 week before exam I can describe the circumstances in which an object might become charged

- Physics only

Practice Questions

1. A student uses some everyday items to investigate static electricity. a. Complete the sentences below. Rubbing the plastic strip with a cloth causes the strip to become negatively charged. This happens because ___________ move from the cloth onto the plastic strip. The cloth is then left with a ___________ charge. ( 2 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level. b. When the plastic strip is hung over the wooden rod, the two halves of the strip move equally away from each other. What conclusions can the student make about the forces acting on the two halves of the plastic strip? …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) c. Electrical charges move more easily through some materials than through other materials. Through which one of the following materials would an electrical charge move most easily? Draw a ring around your answer. Aluminium Glass Rubber ( 1 mark)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

3. A student takes off his nylon fleece and feels a small electrical shock. He then realises that this happens because his fleece becomes charged. a. Explain how his fleece becomes charged. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) b. The diagram shows a lightning conductor attached to the side of a building. If the building is struck by lightning, the charge flows to the earth through the lightning conductor. Which one of the materials below should be used to make the lightning conductor? Copper Glass Plastic Give a reason for your answer …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (3 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

4. The diagram shows a polythene rod being rubbed with a woollen cloth. a. Explain how the polythene rod becomes negatively charged. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) b. A student put the charged polythene rod on to a balance. The rod was separated from the metal pan of the balance by a thin block of insulating material. The student then held a second charged polythene rod above (but not touching) the first rod. The reading on the balance increased. Explain why the reading on the balance increases. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) Polythene rod Insulating material Balance

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Practice Questions

1. A van de Graaff generator that is used to investigate static electricity. Before it is switched on, the metal dome has no overall charge. After it is switched on, the metal dome becomes negatively charged. a. Explain how an uncharged object may become positively charged. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (5 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level. b. The image below shows a plan view of the positively charged metal dome of a van de Graaff generator. Draw the electric field pattern around the metal dome when it is not interacting with anything from its surroundings. (2 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Circuit Symbols and Current

Knowledge Checklist

Specification statement These are the bits the exam board wants you to know, make sure you can do all of these… Self-assessment Bits to help if you don’t understand First review 4 - 7 months before exam Second review 1 - 2 months before exam Final review Week before exam I can draw and use the common circuit symbols

https://youtu.be/HiVcnpD QOcI I can draw series and parallel circuits

https://youtu.be/2QBTaq 63mYk https://youtu.be/rbLqufY EVN https://youtu.be/xZXKaQ W2jBc https://youtu.be/oBuewt 6m_KM I can define the terms charge and current

https://youtu.be/k3vCg3l Gpys I can recall the units needed for Q = It

I can rearrange Q = It ☺^ ^ ^ ☺^ ^ ^ ☺^ ^  I can use Q = It ☺   ☺   ☺  

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Practice Questions

1. Name a circuit component that is used to provide a current in a circuit. …………………………………………………………………………………………………………………………….. (1 mark)
2. Current, charge and time are linked together by the equation: Charge = Current x time Write down the units that we measure each quantity in from the equation. Charge: ………………….. Current: ………………….. Time: ………………….. (3 marks)
3. A circuit has a current of 3 amps. a. Calculate the charge that flows in the circuit in 20 seconds. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

6. Use the diagram below to help you answer this question. a. The current flowing through A 1 is 5A. What would the current be that is flowing through A 3? …………………………………………………………………………………………………………………………….. Justify your answer …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) b. Calculate the current that flows through each lightbulb in 1 hour. Give a unit for your answer. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. Charge: ………………….. Unit: ………………….. (4 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level.

Series and parallel

Knowledge Checklist

Specification statement These are the bits the exam board wants you to know, make sure you can do all of these… Self-assessment Bits to help if you don’t understand First review 4 - 7 months before exam Second review 1 - 2 months before exam Final review 1 week before exam I can describe the way current behaves in a series circuit

https://youtu.be/g2kUj3x fM https://youtu.be/E70eNm 2lITI https://youtu.be/OdmmK xa0Nhs https://youtu.be/g2kUj3x fM I can describe the way potential difference behaves in a series circuit

I can describe the way resistance behaves in a series circuit

I can describe the way current behaves in a parallel circuit

I can describe the way potential difference behaves in a parallel circuit

I can describe the way resistance behaves in a parallel circuit

Primrose Kitten – YouTube Tutorials for GCSE and A-Level. e. In circuit A, the current through the resistor is 1.5A. What is the value of the current that is flowing through the bulb? Current: ………………. (1 mark) f. Explain your answer to part e. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (1 mark)

2. A 13A current flows from a 230V mains electricity supply to a kettle. The kettle is on for 180s. Calculate: a. The charge that flowed from the plug socket to the kettle: …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks) b. The energy that is transferred from the kettle to heat the water: …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. (2 marks)

Primrose Kitten – YouTube Tutorials for GCSE and A-Level. c. If all of the energy in b. was transferred to heat the water; use the following information to find the mass of water that was in the kettle. o The starting temperature of the water was 22oC, and the kettle turned off when the water was boiling. o The specific heat capacity of water is 4200J/kg.oC o The equation for specific heat capacity is E = m x c x ΔT …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. …………………………………………………………………………………………………………………………….. Mass: ………………. kg (5 marks)