Question

1-

A U-shaped conductor and conducting rod are used to form a slidewire generator. The generator lies in the xy plane with its conducting rod being parallel to the y axis and sliding along the positive x axis. A uniform magnetic field is applied in the positive z direction. If the velocity of the rod is doubled, what happens to the power dissipated by the generator's resistance?

-It is quadrupled

- It is doubled

-It stays the same

-It is halved

-It's quartered

2- The electric field induced by a changing magnetic field is not conservative. (True/ FALSE )

3- Lenz's law tells us that the induced current in a circuit opposes the _____________ through the circuit.

-change in magnetic flux

-magnetic flux

-change in magnetic field

4- A circular loop of wire lies within the horizontal plane, and you are viewing it from above. You hold a magnet above the loop, with its north pole up and south pole down, and you drop the magnet. As the magnet begins to drop, in what rotational direction will you see the induced current in the loop flow?

-Clock wise

-counter-clock wise

5- A uniform magnetic field is directed along the negative z axis. A conducting rod oriented parallel to the y axis moves in the positive x direction. Will the top of the rod (on the positive y side) be at a higher or lower electric potential in comparison to the bottom of the rod (on the negative y side)?

- lower

-higher

6- A metal detector works by detecting the magnetic field generated by ________________ [two words] induced within a conducting object carried through the detector.

-magnetic field

Answer 1

This problem is from topic electromagnetic induction.

Concepts used:

According to Faradays law whenever magnetic flux changes through a closed coil an emf is induced in it.

Lenzs law:According to this law emf is induced in the loop in such a way that current due to it opposes the change in flux through the loop.