Understanding the magnetic effect of a current

• What do the fingers represent in the right hand thumb rule?

  Direction of magnetic field lines
• What is the purpose of the device shown in the image?

  • The device is used to measure the Hall effect
  • The Hall effect is the production of a voltage difference across an electrical conductor when a magnetic field is applied perpendicular to the flow of electric current
• What does the thumb represent in the right hand thumb rule?

  Direction of electric current flow
• How does the direction of the magnetic field change with the direction of current flow?

  It changes according to the right hand thumb rule
• How is electricity described in the context of electromagnetism?

  As a river of tiny magical cars
• How is the direction of the magnetic field related to the direction of the current in a straight wire?

  • If current flows upwards, the magnetic field circulates counter-clockwise.
  • If current flows downwards, the magnetic field circulates clockwise.
• How do the magnetic field lines differ when the current flows downward versus upward?

  Downward creates clockwise lines, upward anticlockwise
• What does an electric current create around a wire?

  A circular magnetic field
• Where is the magnetic field strongest around a current-carrying wire?

  Nearest the wire
• What is the purpose of the circular arrangement of the Hall probes in the device?

  To measure the Hall voltage in multiple directions
• What are the components of the Right Hand Thumb/Grip Rule?

  • Thumb points in the direction of the current (I)
  • Fingers wrap around the wire in the direction of the magnetic field (B)
  • Palm faces the direction of the magnetic field (B)
• What is the term for the force field created by moving electricity?

  Magnetic field
• What does the Right Hand Thumb/Grip Rule demonstrate?

  The direction of the magnetic field around a current-carrying wire
• What is the definition of electromagnetism?

  Interaction between electricity and magnetism
• What role does the current play in an electromagnet?

  It induces a magnetic field in the core
• What happens to the magnetic strength of an electromagnet when the battery voltage is increased?

  It boosts the magnetic strength
• How can a changing magnetic field affect electric currents?

  It can induce an electric current
• How is an electromagnet created?

  By electric current flowing through a wire
• What component controls the flow of current in the circuit?

  Switch
• What is the name of the device shown in the image?

  RHR-2
• In which direction does the magnetic force act in an electromagnet?

  Along the direction of current flow
• Why does using a stronger core material enhance an electromagnet's strength?

  It concentrates the magnetic field produced
• What is the relationship between electricity and magnetism in electromagnetism?

  • Electricity flowing creates magnetism
  • Magnetism is produced by moving electric charges
  • They are interconnected phenomena
• What are the main sources of EMF shown in the image?

  solar panels, wiring, and electrical appliances
• What are some other sources of EMF shown in the image besides buildings and devices?

  • Powerlines
  • Worktools
  • Switch
• What is the device shown that can generate EMF through a power supply?

  supply
• What effect does increasing the number of coils have on an electromagnet?

  It increases the total magnetic field produced
• What physical phenomenon is created around a wire when current flows through it?

  A magnetic field
• What is the device shown that can generate EMF?

  mobile phone mast
• How do you apply the right hand thumb rule?

  Point thumb in current direction, curl fingers
• What is the primary function of electromagnets in these applications?

  To generate magnetic fields for controlled movement
• What is the device shown that can generate EMF through entertainment electronics?

  entertainment electronics
• What happens to the magnetic field direction if the current direction is reversed?

  The magnetic field direction also reverses
• What is the name of the source of EMF shown in the image?

  NATURE
• What electrical component is depicted in the diagram?

  Cell
• How does the Right Hand Thumb/Grip Rule differ from the Left Hand Rule for motors?

  The Right Hand Thumb/Grip Rule is used for determining the direction of the magnetic field around a current-carrying wire, while the Left Hand Rule is used for determining the direction of the force on a current-carrying wire in a magnetic field
• If the electric current flows upwards, what is the direction of the magnetic field?

  Anticlockwise
• What are the key components of the device shown in the image?

  • Magnetic field (B)
  • Electric current (I)
  • Hall probe (I, B)
  • Voltage measurement (V_H)
• What shape does the magnetic field form around a current-carrying wire?

  Concentric circles
• What is the device shown that can generate EMF through mobile communication?

  mobile phone