Unit 4.4 Magnetic fields

Question 1

What are the 4 properties of the magnetic field around a current carrying straight wire?

Answer 1

• Circular field lines
• Field lines in a perpendicular plane to current flow
• Reversing current reverses the direction of the magnetic fields
• Closest near to wire…?

Question 2

Describe Right-Hand Grip rule
(2 2-ways)

Answer 2

• Grip the conductor with thumb pointing
• in direction of the current
• Fingers will be gripping the conductor in the
• same direction as the magnetic field