1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h [Latent heat of ice is $$3.4 \times {10^5}$$ J/kg and g = 10 N/Kg]
A
136 km
B
68 km
C
34 km
D
544 km
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
Two non-mixing liquids of densities $$\rho $$ and n$$\rho $$ (n > 1) are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length $$\rho $$L ($$\rho $$ < 1) in the denser liquid. The density d is equal to
A
$$\left\{ {2 + \left( {n - 1} \right)p} \right\}\rho $$
B
$$\left\{ {1 + \left( {n - 1} \right)p} \right\}\rho $$
C
$$\left\{ {1 + \left( {n + 1} \right)p} \right\}\rho $$
D
$$\left\{ {2 + \left( {n + 1} \right)p} \right\}\rho $$
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U1, at wavelength 500 nm is U2 and that at 1000 nm is U3. Wien's constant, b = 2.88 $$ \times $$ 106 nm K. Which of the following is correct ?
A
U1 > U2
B
U2 > U1
C
U1 = 0
D
U3 = 0
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then
A
Compressing the gas isothermally or adiabatically will require the same amount of work.
B
Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.
C
Compressing the gas isothermally will require more work to be done.
D
Compressing the gas through adiabatic process will require more work to be done.
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