$\tau = \mu B \sin \theta \Rightarrow 0.016 = \mu \times B \times \frac{1}{2}$ $\Rightarrow \mu = \frac{0.032}{B}$ $W_{ext} = U_{f} - U_{i} = \mu B

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$\tau = \mu B \sin \theta \Rightarrow 0.016 = \mu \times B \times \frac{1}{2}$ $\Rightarrow \mu = \frac{0.032}{B}$ $W_{ext} = U_{f} - U_{i} = \mu B - (- \mu B) = 2 \mu B$ $= 2 \times \frac{0.032}{B} \times B$ $= 0.064 ext{ J}$

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

A short bar magnet placed with its axis at $30^{\circ}$ with an external field of $800$ $Gauss$, experiences a torque of $0.016 ext{ N.m}$. The work done in moving it from most stable to most unstable position is $\alpha \times 10^{-3} ext{ J}$. The value of $\alpha$ is . . . . . . . . . .

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$32$
B
$64$
C
$16$
D
$128$

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$A$ particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of the Earth and the speed of the particle at that instant are respectively:

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Match the List-$I$ with List-$II$:

List-$I$ (Isothermal process for ideal gas system) List-$II$ (Work done)

$(A)$ Reversible expansion $(I)$ $w = 0$

$(B)$ Free expansion $(II)$ $w = -nRT \ln \frac{V_f}{V_i}$

$(C)$ Irreversible expansion $(III)$ $w = -p_{ex}(V_f - V_i)$

$(D)$ Irreversible compression $(IV)$ $w = -p_{ex}(V_i - V_f)$

Choose the correct answer from the options given below:

List-$I$ (Isothermal process for ideal gas system)	List-$II$ (Work done)
$(A)$ Reversible expansion	$(I)$ $w = 0$
$(B)$ Free expansion	$(II)$ $w = -nRT \ln \frac{V_f}{V_i}$
$(C)$ Irreversible expansion	$(III)$ $w = -p_{ex}(V_f - V_i)$
$(D)$ Irreversible compression	$(IV)$ $w = -p_{ex}(V_i - V_f)$

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The narrower distal end of the stomach is called:

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Light of wavelength $4000 \, \mathring A$ is incident on a sodium surface for which the threshold wavelength of photoelectrons is $5420 \, \mathring A$. The work function of sodium is .......... $eV$.

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The plates of a parallel plate capacitor are charged up to $100\;V$. $A$ $2\;mm$ thick plate is inserted between the plates. Then,to maintain the same potential difference,the distance between the plates is increased by $1.6\;mm$. The dielectric constant of the plate is:

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A short bar magnet placed with its axis at $30^{\circ}$ with an external field of $800$ $Gauss$, experiences a torque of $0.016 ext{ N.m}$. The work done in moving it from most stable to most unstable position is $\alpha \times 10^{-3} ext{ J}$. The value of $\alpha$ is . . . . . . . . . .

Similar Questions

$A$ particle is released from height $S$ from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of the Earth and the speed of the particle at that instant are respectively:

The narrower distal end of the stomach is called:

Light of wavelength $4000 \, \mathring A$ is incident on a sodium surface for which the threshold wavelength of photoelectrons is $5420 \, \mathring A$. The work function of sodium is .......... $eV$.

The plates of a parallel plate capacitor are charged up to $100\;V$. $A$ $2\;mm$ thick plate is inserted between the plates. Then,to maintain the same potential difference,the distance between the plates is increased by $1.6\;mm$. The dielectric constant of the plate is:

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