IN a physics lab, a student discovers that the magnitude of the magnetic field at a certain distance from a long wire is 4.0μT.
1 answer:
Answer:
0.25 m
Explanation:
The intensity of the magnetic field around a current-carrying wire is given by:
where
where
is the permeabilty of free space
I is the current
r is the distance from the wire
In this problem, we know:
is the magnetic field
is the current in the wire
Re-arranging the equation, we can find the distance of the field from the wire:
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Answer:
The charge stored in a parallel plate capacitor is proportional to the potential, and capacitance across the plates.
Explanation:
The capacitance of a parallel plate capacitor is given by:
where
Q is the charge stored
V is the potential difference across the capacitor
Re-arranging the formula, we get
From this expression, we see that the charge stored (Q) is proportional to both the potential (V) and the capacitance (C).
Answer:
Solution is attached below.
Explanation:
