Answer:
0.29 m
Explanation:
9 mm = 0.009 m in diameter
Cross-sectional area
Let the tensile modulus of Nickel .
The elongation of the rod can be calculated using the following formula:
A 21 N block rests on a horizontal surface. The coefficients of static and kinetic friction between the surface and the block ar
1 answer:
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Answer:
The Resultant Induced Emf in coil is 4∈.
Explanation:
Given that,
A coil of wire containing having N turns in an External magnetic Field that is perpendicular to the plane of the coil which is steadily changing. An Emf (∈) is induced in the coil.
To find :-
find the induced Emf if rate of change of the magnetic field and the number of turns in the coil are Doubled (but nothing else changes).
So,
Emf induced in the coil represented by formula
∈ = ...................(1)
Where:
. { B is magnetic field }
{A is cross-sectional area}
. No. of turns in coil.
. Rate change of induced Emf.
Here,
Considering the case :-
&
Putting these value in the equation (1) and finding the new emf induced (∈1)
∈1 =
∈1 =
∈1 =
∈1 = 4∈ ...............{from Equation (1)}
Hence,
The Resultant Induced Emf in coil is 4∈.
Answer:
The capacitance of the capacitor is
Explanation:
To solve this exercise it is necessary to apply the concepts related to Power and energy stored in a capacitor.
By definition we know that power is represented as
Where,
E= Energy
t = time
Solving to find the Energy we have,
Our values are:
Then,
With the energy found we can know calculate the Capacitance in a capacitor through the energy for capacitor equation, that is
Solving for C=
Therefore the capacitance of the capacitor is