The magnitude of the magnetic force per unit length on the top wire is
2×10⁻⁵ N/m
<h3>How can we calculate the magnitude of the magnetic force per unit length on the top wire ?</h3>
To calculate the magnitude of the magnetic force per unit length on the top wire, we are using the formula
F= 
Here we are given,
= magnetic permeability
= 4
×10⁻⁷ H m⁻¹
If= 12 A
d= distance from each wire to point.
=0.12m
Now we put the known values in the above equation, we get
F= 
Or, F = 
Or, F= 2×10⁻⁵ N/m.
From the above calculation, we can conclude that the magnitude of the magnetic force per unit length on the top wire is 2×10⁻⁵ N/m.
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the answer to you question is D.
Answer:
E) d_{2} = 4d_{_{1}}
Explanation:
We know that the range of a projectile is given by:

where:
u = initial velocity of the projectile
angle of projection of projectile
<u>Now, range for ball 1 :</u>

<u>Now, range for ball 2 with double velocity and all the other parameters being the same:</u>



Answer:
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