Class 11 Physics · Chapter 10 · Test 1
Magnetic Force and Flux
39 MCQs This test covers the force on a current-carrying conductor, Fleming’s left-hand rule, F = BIL sinθ, and the tesla as the unit of magnetic induction. It also covers magnetic flux and flux density, flux linkage, force on a moving charge F = qvB sinθ, circular motion in a field, and the velocity selector.
39 questions · 35 min · 39 marks
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Sample questions
The first 5 of 39. Try each one, then tap to see the answer.
Question 1
A current-carrying conductor placed in a magnetic field experiences:
- ANo force
- BA force
- COnly heating
- DOnly a torque on its charge
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Answer: B
The interaction between the conductor's own magnetic field and the external field produces a force.
Question 2
Oersted found in 1820 that electricity and magnetism are:
- AUnrelated
- BRelated
- COpposite effects only
- DIdentical
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Answer: B
Oersted showed that a current produces a magnetic effect.
Question 3
The force on a current-carrying conductor in a magnetic field is:
- AParallel to both the current and the field
- BParallel to the field only
- CPerpendicular to both the current and the magnetic field
- DParallel to the current only
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Answer: C
F is perpendicular to the plane containing the current and B.
Question 4
The direction of the force on a current-carrying conductor is predicted by:
- ALenz's law
- BFleming's left-hand rule
- COhm's law
- DKirchhoff's rule
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Answer: B
Fleming's left-hand rule gives the direction of force.
Question 5
In Fleming's left-hand rule the first finger points along the:
- ACurrent
- BForce
- CMagnetic field
- DVelocity of the wire
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Answer: C
First finger is the field second finger is the current and thumb is the force.
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