Question

10. What is the direction of the magnetic force on a positive charge and a negative charge that moves as shown in each case shown? Be clear for each. В. X X XB B B x x x OOOO V xxx Vout Vin ܘܘ x x x B

Answer 1

We can find the direction of the magnetic foce using Fleming's left hand rule.

The direction positive charge is the direction of current.

The direction negaitive charge is opposite to the direction of current.

1)

A oooo ooo . Ban 000 .

Magnetic field, B_out is out of the plane

Direction of charge is downward.

a) For negative charge

Direction of current is upward

Therefore,

Force is along RIGHT

b) For positive charge

Direction of current is downward

Therefore,

Force is along LEFT

2)

V в

Magnetic field, B is along right

Direction of charge is upward

a) For negative charge

Direction of current is downward

Therefore,

Force is along OUT OF THE PLANE

b) For positive charge

Direction of current is upward

Therefore,

Force is along INTO THE PLANE

3)

X X X XB. xx x x X X xx X X X

Magnetic field, B_in is into the plane

Direction of charge is along right

a) For negative charge

Direction of current is left

Therefore,

Force is along DOWNWARD

b) For positive charge

Direction of current is right

Therefore,

Force is along UPWARD

4)

B х Vn

Magnetic field, B is upward

Direction of charge is into the plane

a) For negative charge

Direction of current is out of the plane

Therefore,

Force is along LEFT

b) For positive charge

Direction of current is into the plane

Therefore,

Force is along RIGHT

5)

Vout B

Magnetic field, B is along left

Direction of charge is out of the plane

a) For negative charge

Direction of current is into the plane

Therefore,

Force is along UPWARD

b) For positive charge

Direction of current is out of the plane

Therefore,

Force is along DOWNWARD

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