1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
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
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
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
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
The value of coefficient of volume expansion of glycerin is 5 $$\times$$ 10$$-$$4 K$$-$$1. The fractional change in the density of glycerin for a rise of 40oC in its temperature, is
A
0.025
B
0.010
C
0.015
D
0.020
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