Magnetic Force and Fields

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1. This question is about Electric Fields. Fill in the blanks.
Symbol ____
Caused by____
Affects ____
Two types of ____
Simple force rule ____
• Symbol: E
• Caused by: Charges
• Affects: Charges
• Two types of: Charges- Postive/Negative
• Simple force rule: Like charges repel, unlike charges attract.

2. This question is about Magnetic Fields. Fill in the blanks.
Symbol ____
Caused by____
Affects ____
Two types of ____
Simple force rule ____
• Symbol: B
• Caused by: Magnets (or electric currents)
• Affects: Magnets (or electric currents)
• Two types of: Poles (North and South)
• Simple force rule: Like poles repel, unlike poles attract.
3. How are strength and direction of the force felt in a magnetic field represented using field lines?
• The direction of the force is shown by the direction of the field lines.
• The strength of the force is shown by how close the lines are to one another.
4. What are three differences between electric fields and magnetic fields?
• A magnet does not feel a force when placed in an electric field.
• A positive charge does not feel a force when placed stationary in a magnetic field.
• Isolated charges exist whereas isolated poles do not.
5. What hand rule is used to find the direction of field lines when direction of a current is given?
• The Right Hand Rule.
• The thumb represents current direction.

The curled fingers represents the direction of field lines.
6. Describe the motor effect
• When a current-carrying wire is placed in a magnetic field the magnetic interaction between the two results in a force.
• The direction of this force is at right angles to the plane that contains the field and the current.
7. A single charge moving through a magnetic field also feels a force in exactly the same way that a current feels a force.
List four factors a force on a moving charge proportional to.
• The magnitude of the magnetic field, B.
• The magnitude of the charge, q.
• The velocity of the charge, v.
• The sine of the angle, θ, between the velocity of the charge and the field.
8. Find the equation for magnetic force on a moving charge using the variables B(magnetic field), q (charge), v (velocity of charge), and sinθ (angle between velocity of charge and field.

Rearrange the equation to find an equation for magnetic field, B.
• • 9. Outline what each finger in Flemings left hand rule represents.
• Thumb represents Magnetic Force.
• Index represents Field
• Middle represents Current

Abbreviation: Manchester Football Club, or Mother Fucking Cunt.
10. Experiments show that What does each letter represent? Rearrange the equation to find an equation for B.
• B is the magnitude of the magnetic field
• I is the magnitude of the current
• L is the length of the current within the magnetic field
• is the sine of the angle between the field and current.
11. Name two different units used to represent magnetic field strenth.
• Tesla (T)
• Wieber ( )
 Author: richardive ID: 171888 Card Set: Magnetic Force and Fields Updated: 2012-09-19 15:14:00 Tags: Physics Magnetism Magnetic Force Fields Folders: Description: Magnetic Field Lines/Magnetic Force on a Current/Magnetic Force on a Moving Charge Show Answers: