A proton of charge 1.6 x 10\(^{19}\)C is projected into a uniform magnetic field of flux density 5.0 x 10\(^5\)T. If the proton moves parallel to the field with a constant speed of 1.6 x 10\(^6\)ms\(^{-1}\), calculate the magnitude of the force exerted on it by the field
0.0N
2.0 x 10-21N
1.3 x 10-17N
5.1 x 10-14N
2.3 x 1013N
Explanation
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Discussions (5)

o determine the magnitude of the force exerted on the proton by the magnetic field, we use the formula for the magnetic force on a moving charge:
𝐹
=
𝑞
𝑣
𝐵
sin
𝜃
Where:
𝐹
is the magnetic force,
𝑞
=
1.6
×
10
−
19
C
is the charge of the proton,
𝑣
=
1.6
×
10
6
ms
−
1
is the velocity of the proton,
𝐵
=
5.0
×
10
−
5
T
is the magnetic flux density,
𝜃
is the angle between the velocity of the proton and the magnetic field.
Step 1: Analyze the angle
Since the proton is moving parallel to the magnetic field, the angle
𝜃
between the velocity and the field is
0
∘
. For
𝜃
=
0
∘
,
sin
0
∘
=
0
.
Step 2: Calculate the force
Substitute the values into the formula:
𝐹
=
(
1.6
×
10
−
19
)
(
1.6
×
10
6
)
(
5.0
×
10
−
5
)
sin
0
∘
Because
sin
0
∘
=
0
:
𝐹
=
0
N
Final Answer:
The magnitude of the force exerted on the proton is 0.0 N, which corresponds to option A.

The question was not correctly typed, the magnetic flux density "B" was not given in the question

iN SIMPLE SENSE
If its not perpendicular the V is zero and so the forece is zero, so anything parallel is a trick bcuz it is zero

