As we know that magnetic field strength due to solenoid is given by
here we know that
= permeability of air medium
N = number of turns
L = length of solenoid
i = electric current
Now as we enter the iron rod into the solenoid the medium will get change that will increase the permeability
so with the iron rod we will have
so correct answer will be
<u>It increases the magnetic field’s strength. </u>
In a force diagram set-up, we name the angle of inclination theta, g as the acceleration due to gravity. In this case, the forces acting on the box going down is the weight itself impeded by the friction between the box and the inclined plane.
The weight of the box is expressed as mg sin theta
The frictional force is expressed as the normal force times the coefficient of friction that is expressed as mu g cos theta.
By Newton's second law of motion, F = ma = mg sin theta - mu g cos theta
Thus, a = g (sin theta - u cos theta
Answer:
Solid at room temperature
Explanation
Since these elements are metals they must be said at room temperature
Solid at room temperature
Theoritically
the body moving with uniform velocity has acceleration zero.
Mathmatically,
u=3m/s
v=3m/s (since body is moving with uniform velocity)
a= v-u/t
3-3/t
0/t
0m/s.s
