10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of t
1 answer:
Answer:
a. The thickness of the wire is 2.5 mm.
b. The wire is 0.25 cm thick.
Explanation:
Number of turns of the wire = 10
The length of total turns = 25 mm
a. The thickness of the wire can be determined by;
thickness of the wire =
=
= 2.5 mm
Therefore, the wire is 2.5 mm thick.
b. To determine the thickness of the wire in centimetre;
10 mm = 1 cm
So that,
2.5 mm = x
x =
= 0.25 cm
The wire is 0.25 cm thick.
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Answer:
Explanation:
Given that :
The current I = 7.2 A
The length vector L = 2.2 m i
The force vector is = -2.6 j N
When L = 2.2 m i ; the
Force vector F = (2.6 i - 4.4 k) N
Compute the components of the magnetic field as follows:
Replacing 7.2 A for I ; -2.6 j N for F & 2.2 m i for L
However in y direction ; we have :
Hence, the component of magnetic field is as follows:
Answer:
Explanation:
The self-inductance of a solenoid is defined as:
Here is the the permeability of free space, N is the number of turns in the solenoid, A is the cross-sectional area os the solenoid and l its length. We replace the given values to get the self-inductance: