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An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed,...

      

An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed, the wire XY experiences a force.
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(i) In which direction does the wire XY- experience the force?
(ii) How do you determine the direction in (i) above
(iii) When is the force on the wire XY greatest?
(iv) What is the effect of reversing both the magnetic field and direction of flow of current?
(v) State TWO factors by which the force on XY can be decreased

  

Answers


Wilfred
i) Towards the right

ii)
Using the Fleming’s left hand rule.
First finger- Field
Second finger- Current direction
Thumb – Motion

iii)
-When the wire is positioned at right angle to the magnetic field.
-It is minimum when the wire is parallel to the magnetic field.

iv) No effect

v)
- Reducing the amount of current.
- Replacing the magnet with a weaker one.
Wilfykil answered the question on March 26, 2019 at 05:25


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