B. Reversing the current direction will cause the force deflecting the
wire to be perpendicular to the magnetic field but in the opposite
direction.
Age of dino: Mesozoic era
End of earth a dessert: End of the Mesozoic
a layer: Paleozoic
Darker is warmer C. Black objects.
Answer:

Explanation:
The given data in the question is
Magnetic field : 
Turns : 
Length : 
So, number of turns per unit length :



If current is I , then magnetic field is given by

Also,

Insert the values


The current will be 
Answer:
the car you are in the cars have the same time frame and one covers more ground so on a possition time graph the slope will be greater