*** I cant understand what he looking for in part a .. (ii) In the circuit shown
ID: 3898571 • Letter: #
Question
*** I cant understand what he looking for in part a .. (ii)
In the circuit shown, the current passes through the rectangular strip. Current is defined in terms of motion of positive charges, In which direction is the current in the strip? If the charge carriers are actually negative, in which direction do these charge carriers move through the strip? An external magnetic field is made to pass through the strip. The field is directed out of and perpendicular to the page, In which direction is the magnetic force on the charge carriers? Which side of the strip has a higher potential: a or b? (Magnetic field sensors use this potential difference between a and b to measure the strength of the magnetic field perpendicular to the strip.)Explanation / Answer
he is asking the direction of current for positive and negative charges in an applied field
a . when we apply a field charges present in the strip will align and move in the / opposite to field direction depending on charge is positive /negatve
if charge is positive current direction will be along the direction of charge movement.
if charge is negative(electrons) current direction will be opposite to the direction of electrons movement.
in this case for positive charge : current moves from right to left in the strip.
for negative : current moves from left to right.
part b:
F = q(VxB) cross product of -ixk = j cap
force will be upwards for -ve charge and vice versa . so "a" will have higher potential
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