2. What effect does increasing the current have on a solenoid?
A It will weaken the poles of the electromagnet.
OB It will reverse the current's flow.
C It will produce a weaker magnetic field.
D It will produce a stronger magnetic field.

It will produce a stronger magnetic field.

Explanation:

Ampere’s law states the magnetic field of a solenoid is directly proportional to the current supplied.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min