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Physics-

General

Easy

Question

A certain mass of a gas is compressed first adiabatically [curve (a)], and then isothermally [curve (b)]. In both the cases, the initial state of the gas is same If $W subscript 1 end subscript$ is the work done in the first case and $W subscript 2 end subscript$ is the work done in the second case , then

$W_{1} = W_{2} \neq 0$
$W_{1} > W_{2}$
$W_{1} < W_{2}$
$W_{1} = W_{2} = 0$

The correct answer is: $W subscript 1 end subscript greater than W subscript 2 end subscript$

$W. D equals not stretchy integral p d v equals$ area between p-v curve and V – axis

Related Questions to study

A resistance ‘R’ connected to an external battery is put inside an adiabatic cylinder containing an ideal gas as shown. The piston can move along cylinder length without friction and atmospheric pressure is $P subscript 0 end subscript$ . The constant speed ‘v’ by which piston of area of cross-section A should be moved so that temperature of gas do not change is

A resistance ‘R’ connected to an external battery is put inside an adiabatic cylinder containing an ideal gas as shown. The piston can move along cylinder length without friction and atmospheric pressure is $P subscript 0 end subscript$ . The constant speed ‘v’ by which piston of area of cross-section A should be moved so that temperature of gas do not change is

physics-General

A curve graph showing the dependence of pressure and absolute temperature is obtained for an ideal gas, as shown for a certain process. In the given process

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physics-General

If $x equals e to the power of t end exponent sin invisible function application t comma blank y equals e to the power of t end exponent cos invisible function application t comma blank t h e n fraction numerator d to the power of 2 end exponent y over denominator d x to the power of 2 end exponent end fraction blank a t blank x equals pi i s$

If $x equals e to the power of t end exponent sin invisible function application t comma blank y equals e to the power of t end exponent cos invisible function application t comma blank t h e n fraction numerator d to the power of 2 end exponent y over denominator d x to the power of 2 end exponent end fraction blank a t blank x equals pi i s$

parallel

In the process of extraction of gold, Roasted gold ore $plus CN to the power of minus plus straight H subscript 2 straight O not stretchy ⟶ with straight O subscript 2 on top left square bracket x right square bracket plus OH to the power of minus semicolon left square bracket x right square bracket plus Z n not stretchy rightwards arrow left square bracket y right square bracket plus A u$ [x] and [y] are:

In the process of extraction of gold, Roasted gold ore $plus CN to the power of minus plus straight H subscript 2 straight O not stretchy ⟶ with straight O subscript 2 on top left square bracket x right square bracket plus OH to the power of minus semicolon left square bracket x right square bracket plus Z n not stretchy rightwards arrow left square bracket y right square bracket plus A u$ [x] and [y] are:

chemistry-General

Aqueous solution of $F e S O subscript 4 end subscript$ gives test for both $F e to the power of 2 plus end exponent$ and $SO subscript 4 superscript 2 minus end superscript$ but after addition of excess of KCN, solution ceases to give test for $F e to the power of 2 plus end exponent$ . This is due to the formation of

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chemistry-General

A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency $9 divided by pi$ rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes $37 to the power of ring operator end exponent$ the speed of the spot (a point) on the wall is:

A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency $9 divided by pi$ rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes $37 to the power of ring operator end exponent$ the speed of the spot (a point) on the wall is:

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A plano concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be?

A plano concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be?

physics-General

The figure shows a parallel slab of refractive index $n subscript 2 end subscript$ which is surrounded by media of refractive indices $n subscript 1 end subscript$ and $n subscript 3 end subscript$ . Light is incident on the slab at angle of incidence $theta left parenthesis not equal to 0 right parenthesis$ . The time taken by the ray to cross the slab is ' $t subscript 1 end subscript blank to the power of ´ end exponent$ if incidence is from ' $n subscript 1 end subscript$ ' and it is ' $t subscript 2 end subscript$ ' if the incidence is from ' $n subscript 3 end subscript$ '. Then assuming that $n subscript 2 end subscript greater than n subscript 1 end subscript comma n subscript 2 end subscript greater than n subscript 3 end subscript$ and $n subscript 3 end subscript greater than n subscript 1 end subscript$ , then value of $t subscript 1 end subscript divided by t subscript 2 end subscript$ .

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physics-General

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physics-General

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physics-General

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physics-General

Which of the following statements are true (or) false -
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ii) $open square brackets Cr left parenthesis py right parenthesis subscript 2 open parentheses straight H subscript 2 straight O close parentheses subscript 2 Cl subscript 2 close square brackets Cl$ and $open square brackets Cr left parenthesis py right parenthesis subscript 2 open parentheses straight H subscript 2 straight O close parentheses Cl subscript 3 close square brackets straight H subscript 2 straight O$ are ionisation isomers
iii) $open square brackets Pt open parentheses NH subscript 3 close parentheses subscript 4 Br subscript 2 close square brackets Cl subscript 2$ and $open square brackets Pt open parentheses NH subscript 3 close parentheses subscript 4 Cl subscript 2 close square brackets Br subscript 2$ are linkage isomers
iv) cis platin exhibits geometrical isomerism

Which of the following statements are true (or) false -
i) $open square brackets Cr open parentheses NH subscript 3 close parentheses subscript 6 close square brackets open square brackets Cr left parenthesis CN right parenthesis subscript 6 close square brackets$ and $open square brackets Cr open parentheses NH subscript 3 close parentheses subscript 4 left parenthesis CN right parenthesis subscript 2 close square brackets open square brackets Cr open parentheses NH subscript 3 close parentheses subscript 2 left parenthesis CN right parenthesis subscript 4 close square brackets$ are coordination isomers
ii) $open square brackets Cr left parenthesis py right parenthesis subscript 2 open parentheses straight H subscript 2 straight O close parentheses subscript 2 Cl subscript 2 close square brackets Cl$ and $open square brackets Cr left parenthesis py right parenthesis subscript 2 open parentheses straight H subscript 2 straight O close parentheses Cl subscript 3 close square brackets straight H subscript 2 straight O$ are ionisation isomers
iii) $open square brackets Pt open parentheses NH subscript 3 close parentheses subscript 4 Br subscript 2 close square brackets Cl subscript 2$ and $open square brackets Pt open parentheses NH subscript 3 close parentheses subscript 4 Cl subscript 2 close square brackets Br subscript 2$ are linkage isomers
iv) cis platin exhibits geometrical isomerism

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parallel

As shown in the figure the observer 'O' sees the distance AB as infinitely large. If refractive index of liquid is m₁ and that of glass is $mu subscript 2 end subscript comma text then end text fraction numerator mu subscript 1 end subscript over denominator mu subscript 2 end subscript end fraction text is: end text$

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A man starting from point P crosses a 4 km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3 km/hr and walks at a speed of 4 km/hr, then his time of journey is (µ_salt_water = 4/3) :

A man starting from point P crosses a 4 km wide lagoon and reaches point Q in the shortest possible time by the path shown in the figure. If the person swims at a speed of 3 km/hr and walks at a speed of 4 km/hr, then his time of journey is (µ_salt_water = 4/3) :

physics-General

parallel

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