Explanation:
(1) We have,
Wavelength of a wave is 2 meters
Frequency of a wave is 6 Hz
It is required to find the velocity of a wave. The velocity of a wave is given by :
So, the velocity of a wave is 12 m/s.
(2)
Number of waves passing are 100
Time taken to pass the wave is 5 seconds
The frequency of wave is given by total number of waves passing per unit time. So,
Frequency of a wave is 20 Hz.
Answer:
The magnetic field is
Explanation:
From the question we are told that
The mass of the metal is
The current is
The distance between the rail(length of the rod ) is
The coefficient of kinetic friction is
Generally the magnetic force is mathematically represented as
Given that the rod is moving at a constant velocity, it
=>
Where is the kinetic frictional force which is mathematically represented as
So
=>
substituting values
=>
=>