The creation of electricity in a coil of a wire through the movement of a magnet is called what?
1 answer:
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Answer:
a) 6.8 Volt
b) 1.21Цm
Explanation:
We are given from the question that
The zero -bias depletion layer width() is 0.4Цm
The built in voltage φj is 0.85V
Now to calculate the reverse voltage( ) that would be required to triple the depletion - layer width.
The depletion - layer width () of the diode has the formula
For three times of we have
=>
=>
Substituting value of φj
We have
= 6.8 V
The required bias voltage is 6.8 V
The solution for the b part of the question is uploaded on first image
Answer:
1.13 x 10⁵N
Explanation:
Given parameters:
Pressure of the coin press = 3.2 x 10⁸ Pa
radius of the nickel coin = 0.0106m
Unknown:
Force of the press on coil = ?
Solution:
Our knowledge of pressure will help us solve this problem.
Pressure is defined as the force applied per unit area on a body.
Pressure =
Force = Pressure x Area
Since the pressure is known;
Area of the coin = Area of a circle = π r²
where r is the radius of the coin;
Area of the coin = π x 0.0106² = 3.53 x 10⁻⁴m²
Force = 3.2 x 10⁸ x 3.53 x 10⁻⁴ = 1.13 x 10⁵N