Current 1 in a long 4y-axis is paced through a square metal frame of side 2a oriented in the y-z p-lane a shown- The linear mass density of the frame is - A uniform magnetic field B is now switched on along x-axis- Then the instantaneous angular acceleration of the frame will be-

The correct option is A 4IBλ a Linear mass density is λ #160;Current I is along 4y axis through square metal frame of side 2a Instantane ...

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Standard XII

Physics

Rotational EMF

Current 1 i...

Question

Current $1$ in a long $4 y -$ axis is paced through a square metal frame of side $2 a$ oriented in the $y - z$ p[lane a shown. The linear mass density of the frame is $λ$ . A uniform magnetic field $B$ is now switched on along $x -$ axis. Then the instantaneous angular acceleration of the frame will be:

\frac{4 I B}{λ a}

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\frac{12 I B}{λ a}

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\frac{4 I B}{3 λ a}

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z e r o

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Solution

The correct option is A $\frac{4 I B}{λ a}$
Linear mass density is $λ$
Current I is along $4 y - a x i s$ through square metal frame of side $2 a$
Instantaneous acceleration :- $\frac{I B}{λ a} = \frac{4 I B}{λ q}$

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Current 1 in a long 4y−axis is paced through a square metal frame of side 2a oriented in the y−z p[lane a shown. The linear mass density of the frame is λ. A uniform magnetic field B is now switched on along x−axis. Then the instantaneous angular acceleration of the frame will be:

The correct option is A 4IBλaLinear mass density is λ Current I is along 4y−axis through square metal frame of side 2aInstantaneous acceleration :- IBλa=4IBλq

The correct option is A $\frac{4 I B}{λ a}$
Linear mass density is $λ$
Current I is along $4 y - a x i s$ through square metal frame of side $2 a$
Instantaneous acceleration :- $\frac{I B}{λ a} = \frac{4 I B}{λ q}$