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Magnetic Force on Moving Charge

Fleming's lef...

Question

Fleming's left hand rule tells us about direction of magnetic force due to current in magnetic field, but what is its magnitude?

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Solution

$F = (I B l)$
or $F = I B l sin θ$

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Q. Match the following and find the correct pairs:

List I	List II
(a) Fleming's left hand rule	(e) Direction of induced current
(b) Right hand thumb rule	(f) Magnitude and direction of magnetic induction
(c) Biot-Savart law	(g) Direction of force due to magnetic induction
(d) Fleming's right hand rule	(h) Direction of magnetic lines due to current

Q. Describe the activity that shows that a current-carrying conductor experiences a force perpendicular to its length and the external magnetic field. How does Flemings' left-hand rule help us to find the direction of the force acting on the current-carrying conductor?

Q. Fleming's right hand rule is used to determine the direction of force acting on a current carrying wire placed in a magnetic field.

Q. Assertion :When current is represented by a straight line, the magnetic field will be circular. Reason: According to Fleming's left hand rule, direction of force is parallel to the magnetic field.

Q. Right Hand thumb Rule can be used to find direction of magnetic field due to:

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