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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismProperties of magnetEasy2 minPYQ_2020

PhysicsEasysingle choice

If the extension in both the springs increases from $x$ to $x_{0}$ on flowing current $I$ in the rod from $B$ to $A$ then, the value of magnetic field will be -

Options:

Answer:

Solution:

$m g = 2 k x . . . . (i)$

$m g + I B l = 2 k x 0 . . . . . . (2)$

$\frac{m g + I B l}{m g} = \frac{x_{0}}{x}$ or

$I B l = m g (\frac{x_{0}}{x} - 1)$ or $B = \frac{m g}{I l} (\frac{x_{0} - x}{x})$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Properties of magnet

⏱ 2mℹ️ Source: PYQ_2020

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