Electromagnetism

Question 1

Magnetic field

Answer 1

A magnetic field is a region of space where

1) a moving charge
2) magnetic pole
3) current carrying conductor experience magnetic force due to that field

Question 2

Magnetic field

Answer 2

A magnetic field is a region of space where a moving charge, magnetic pole or current carrying conductor experience magnetic force due to that field

Question 3

Explain why the path of the electron in magnetic field is the arc of circle

Answer 3

1) Moving electron experiences a magnetic force perpendicular to the velocity
2) Magnitude of magnetic force is constant
3) Hence the magnetic force provides the centripetal force……

Question 3

Explain why the path of the electron in magnetic field is the arc of circle

Answer 3

1) Moving electron experiences a magnetic force perpendicular to the velocity
2) Magnitude of magnetic force is constant
3) Hence the magnetic force provides the centripetal force……

Question 4

Magneti freec flux density

Answer 4

Magnetic Flux density is defined as force per unit length per unit charge acting on a long straight conductor placed perpendicular to the magnetic field

Question 5

telsa

Answer 5

1) The telsa is the SI unit for magnetic flux density
2) with field perpendicular to a straight current carrying conductor of 1A,
3) giving rise to force per unit length of 1Nm

Question 6

telsa

Answer 6

1) The telsa is the SI unit for magnetic flux density
2) with field perpendicular to a straight current carrying conductor of 1A,
3) giving rise to force per unit length of 1Nm

Question 7

Explain the forces between current carrying conductor

Answer 7

1) Current Conductor X generates a MAGNETIC FIELD in its vicinity whose direction is given by right hand grip rule
2) The current conductor Y within this field would experience a magnetic force, direction given my Fleming left hand rule
3) Current which flows in the same direction will attract while opposite direction would repel

Question 8

A charged particle enters a perpendicular magnetic field, explain why it moves in the arc of a circle.

Answer 8

1) Force due to magnetic field is constant
2) Force–always normal to the direction of motion
3) Force provides centripetal force, particle move in arc of a circle

Question 9

Two situation in which charged particle in the magnetic field does not experience a magnetic force

Answer 9

1) Moving parallel to the direction of magnetic field

2) Stationary

Question 11

Electron entering the field

Upon entering the field, the charged particle will bend downwards instead of upwards.

Answer 11

Electron is negatively charged and by FLHR it can be seen that the magnetic force acting on the electron will be opposite to a positively charged particle.

Also,since the specific charge is higher for the electron due to its relatively small mass, the radius of the circular path will be smaller than that of the positively charged particle.