\(1\) kg of water is converted into steam at the same temperature and at \(1\) atm (\(100\) kPa). The density of water and steam are \(1000\) kgm-3 and \(0.6\) kgm-3 respectively. The latent heat of vaporization of water is \(2.25 \times 10^6 \mathrm{~J} \mathrm{~kg}^{-1}\). What will be the increase in energy?
1. \( 3 \times 10^5 \mathrm{~J} \)
2. \( 4 \times 10^6 \mathrm{~J} \)
3. \( 2.08 \times 10^6 \mathrm{~J}\)
4. None of these
1. \( 3 \times 10^5 \mathrm{~J} \)
2. \( 4 \times 10^6 \mathrm{~J} \)
3. \( 2.08 \times 10^6 \mathrm{~J}\)
4. None of these
1. 0.125 A
2. 1.67 A
3. 0.13 A
4. 0.67A
1. 2.4 × 104 J kg-1
2. 3.6 × 104 J kg-1
3. 7.6 × 102 J kg-1
4. 42 × 103 J kg-1
1. 4.5 x 106 A
2. 3.2 x 10-5 A
3. 9.8 x 10-6 A
4. 6.7 x 10-4 A
1. 27 MV
2. 18 MV
3. 20 MV
4. 23 MV
The resistance of a pair of rods is:
(
and 
\((\rho_{_{al}}=2.6\times10^{-6})~\Omega-m\) and \((\rho_{_{Cu}}=1.7\times10^{-8})~\Omega-m\)1. 1.0 m\(\Omega\)
2. 2.0 m\(\Omega\)
3. 3.0 m\(\Omega\)
4. None of these
A particle is subjected to two simple harmonic motions along the X-axis while the other is along a line making an angle of 45° with the X-axis. The two motions are given by \(x = x_0\) sin \(\omega t\) and \(s = s_0\) sin \(\omega t\). The amplitude of the resultant motion is:
1. \(x_0+s_0+2x_0s_0\)
2. \(\sqrt{x^2_0+s^2_0}\)
3. \(\sqrt{x^2_0+s^2_0+2x_0s_0}\)
4. \(x^2_0=s^2_0+\sqrt2x_0s_0~^{1/2}\)
What is the change in the volume of \(1.0~\mathrm{L}\) kerosene when it is subjected to an extra pressure of \(2.0 \times 10^5 \mathrm{~Nm}^{-2}\) from the following data?
(The density of kerosene \(=800~\mathrm{kgm^3}\) and the speed of sound in kerosene \(=1330~\mathrm{ms^{-1}}\))
1. \(
0.97 \mathrm{~cm}^{-3}
\)
2. \( 0.66 \mathrm{~cm}^{-3} \)
3. \(
0.15 \mathrm{~cm}^{-3}
\)
4. \(0.59 \mathrm{~cm}^{-3}\)
(Take \(g=10\) ms-2.)
1. \( 30 \mathrm{~m} / \mathrm{s} \)
2. \(42 \mathrm{~m} / \mathrm{s} \)
3. \( 46 \mathrm{~m} / \mathrm{s} \)
4. \( 50 \mathrm{~m} / \mathrm{s} \)
1. 5.9
2. 4.9
3. 2.9
4. 1 .9
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