In each picture, the direction of the velocity of the charge and the direction o

Question

In each picture, the direction of the velocity of the charge and the direction of the force it is experiencing is shown. Determine the direction of the magnetic field. You may assume that the charge entered the field with v B. Now relax the assumption that v B and give the answer again for the 1st diagram. A charge -Q is moving with |v| = 10^6 m/s through a magnetic field of 3 T as shown. The charge is moving in a straight line due to the combined effects of B and an electric field. Determine the magnitude and direction of the electric field.

Explanation / Answer

here,

From Right Hand Rule,

Thumb should be faced in Direction of Velocity
Palm shold be facing direction of Force

straight your fingure's to get direction magnaric field.

Part A: 1 part
Fig 1: out of page i.e +z direction
Fig 2: + x axis
Fig 3: out of page i.e +z direction

Part A: 2 part
Direction,
away from + ve charge
Towards - ve charge

Fig 1: away from charge
Fig 2: Towards charge
Fig 3: Towards charge

Part B:
From newton Second, SUM(F) = 0
Electric force = Magnatic Force
q*E = q*v*B*Sin90

Solving for Electric field, E

E = V*B*Sin90
E = 10^6 * 3 * 1
E = 3*10^6 N/C

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