10th grade

In 1831 who discovered electromagnetic induction?

• Thomas Edison
• Nikola Tesla
• Michael Faraday

the current in the resistor?

• 25N

• 25A

• 0,25A

• 0,25T

The velocity of the rod?

• 15,4

• 15,5

• 15,6

• 15,7

The power of the resistor

• 31W

• 31A

• 31,25W

• 31,5W

If R=5 Ohms, length of 2,5m and a uniform B=100T magnetic field is directed into the page. At what speed should the bar be moved to produce a current of 2A in the resistor?

• 40m/s

• 4m/s

• 0.4m.s

• 0,04m/s

What is the force acting on the wire?

• 0.00002N

• 0.0002N

EMF creates what?

• current

• energy

• voltage

• force

Find the direction of the magnetic field

• to the left

• from us

• to the right

• to us

Find the direction of magnetic force.

• to the left

• from us

• to the right

• to us

• Loren's Law

• Lorentz Law

• Ampere's Law

• Fatima's Law