A tube that is placed in an external magnetic field with fluid is flowing throug

Question

A tube that is placed in an external magnetic field with fluid is flowing through the tube. The fluid contains suspended charged molecules (ions). Electrodes are connected to the top and bottom of the tube to measure the voltage. For each of the following below, for the measured voltage change sign, magnitude, will there be no change, or do you need more information? Explain reasoning and draw pictures to support it.

(1) The ions flow faster.

(2) The magnitude of the magnetic field increases.

(3) The direction of the magnetic field reverses.

(4) The flow reverses directions.

(5) A magnetic field is applied along the length of the channel.

(6) An electric field is applied along the length of the channel.

Explanation / Answer

1) magnetic flux is proportional to the amount of cuttent flowing in the coil

ion flow faster magnetic field is high

voltage is cincreased

2) magnetic field is increased, voltage is increased

3)direction is reverse, direction of flow is changed.opposite direction of the current flow, voltage is created

4) current flow where opposite direction of the ion flow,

when flow is reversed, current flow's direction is changed,

in the flow direction voltage is plus

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