Answer:
onservation of energy
U top = K bottom
(m + m)*g*L = 1/2*I*?^2 where I = m*(L/2)^2 + m*L^2 = 1.25*m*L^2
So 2m*g*L = 1/2*1.25*m*L^2*?^2
So ? = sqrt(3*g*/(1.25*L) ) = sqrt(12g/5L)
Explanation:
hope this helps you dear friend.
Answer:
B) Yes, but only those electrons with energy greater than the potential difference established between the grid and the collector will reach the collector.
Explanation:
In the case when the collector would held at a negative voltage i.e. small with regard to grid So yes the accelerated electrons would be reach to the collecting plate as the kinetic energy would be more than the potential energy that because of negative potential
so according to the given situation, the option b is correct
And, the rest of the options are wrong
B. They are rearranged.
The First Law of Thermodynamics states that matter and energy can not be created or destroyed.
Answer:
The magnetic field along x axis is
The magnetic field along y axis is zero.
The magnetic field along z axis is
Explanation:
Given that,
Length of the current element
Current in y direction = 5.40 A
Point P located at
The distance is
We need to calculate the magnetic field
Using Biot-savart law
Put the value into the formula
We need to calculate the value of
Put the value into the formula of magnetic field
Hence, The magnetic field along x axis is
The magnetic field along y axis is zero.
The magnetic field along z axis is