Download The diagram shows a rigidly-clamped straight horizontal current

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Transcript
8
The diagram shows a metal rod suspended in a magnetic field by two vertical conducting
springs. The cell and rod have negligible resistance. When the switch S is closed the effect of the
magnetic field is to displace the rod vertically a distance y.
When both the spring constant and electrical resistance of each spring is doubled, closing the
switch would now cause the rod to be displaced a distance
A
B
C
y
D
4y
(Total 1 mark)
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