If there's a good bulb in the lamp socket, then there's a current
flowing in the lamp's line cord when the lamp is turned on.
If there's a current flowing through the cord, then there's a magnetic
field around it.
Complete Question
The complete question is shown on the first uploaded image
Answer:
Explanation:
From the question we are told
The amplitude of the lateral force is 
The frequency is 
The mass of the bridge per unit length is 
The length of the central span is 
The oscillation amplitude of the section considered at the time considered is 
The time taken for the undriven oscillation to decay to
of its original value is t = 6T
Generally the mass of the section considered is mathematically represented as

=> 
=> 
Generally the oscillation amplitude of the section after a time period t is mathematically represented as

Here b is the damping constant and the
is the amplitude of the section when it was undriven
So from the question

=> 
=> 
=> 
=> 
Generally the amplitude of the section considered is mathematically represented as

=> 
=> 
=> 
=> 
Answer:
41
Explanation:
you subtract the initial velocity which is 10m/s from the final velocity which is 51m/s
Answer:
Magnetic field, B = 
Explanation:
It is given that,
The amplitude of an electromagnetic wave, E = 470 V/m
We need to find the amplitude of the corresponding magnetic field. The relation between electric and magnetic field is :

Where
c is the speed of light

B = 0.00000156

So, the amplitude of the corresponding magnetic field is
. Hence, this is the required solution.