Using Ohm’s Law, explain how resistance changes in relation to current, assuming that voltage remains constant.

1 answer:

7 0

V=IR so voltage is directly proportional to current. So for a given resistance increasing the voltage will result in a high current as well. This is because resistance is proportional to the voltage over the current. Ex: I=V/R
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In a particular region, there is a uniform magnetic field with a magnitude of 2.00 T. You take a particle with a charge of +6.00

expeople1 [14]

Answer:

a) 1.68 N b) 0 c) 14.5º

Explanation:

The force on a charge moving in a magnetic field, is a vector perpendicular to the plane defined by the velocity of the charge and the magnetic field.
The magnitude of the force F is given by the following expression:

$F = q*v*B*sin\theta (1)$

where q= magnitude of the charge of the particle, v=velocity of the particle, B= magnitude of the magnetic field, and θ= angle between v and B.
Replacing by the known values in (1) we have:

$F = q*v*B*sin\theta (1) = 6.00e-6C*1.40e5m/s*2T*sin\theta=\\ \\ F= 1.68N*sin\theta$

The maximum possible value of F happens when sin θ =1
This means that v and B are perpendicular each other (in the same plane)
So, Fmax = 1.68 N

If the maximum possible value of F happens when sin θ = 1, the minimum possible is when sin θ = 0.
In this case, when v and B are parallel each other, the force is just 0.