Vi =0 ( as car starts from rest )
Acceleration= a = 5m/s²
t =12sec
Vf =Vi + at
Vf= 0 + (5m/s²) (12s)
Vf=60 m/s
Answer : The speed of waves along the wire is, 1.2 m/s
Explanation :
Formula used :

where,
= frequency = 
= wavelength =
c = speed of wave = ?
Now put all the given value in the above formula, we get the speed of waves along the wire.


Thus, the speed of waves along the wire is, 1.2 m/s
Answer: a) close together
Explanation: The electric field lines also represent the intensity of the field, in this sense for strong electric fields it is usually draw the lines close to each other. In constrast when they are far apart the electric field is weak.