ICSE Class 10 Physics 2020 Solved Paper

Question : 23 of 67

Marks: +1, -0

When a current carrying conductor is placed in a magnetic field, it experiences a mechanical force. What should be the angle between the magnetic field and the length of the conductor so that the force experienced is :
(i) Zero
(ii) Maximum?

Solution:

We know,

{\F}= {\BI} l sin \;θ,

where

θ

is the angle between the magnetic field and the length of the conductor, thus
(i) For the force (F) to be zero, angle

θ=0^{∘}

( ∵ sin \;0^{∘}=0)

(ii) For the force

( {\F})

to be maximum, angle

θ=90^{∘} ( ∵ sin \;90^{∘}=1)

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