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96. The value of Van der Waals constant 'a' is the largest for(a) O2(b) NH3(c) H2(d) N2
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74. The ionizing power of ?-particle is ......... times more than that of ?-particles(a) 10+2(b) 10-1(c) 10-2(d) 10-4
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72. The appropriate current in amp/sec necessary to produce O2 gas at the rate of 10-3 litre persecond is(a) 1.723(b) 0.1723(c) 17.23(d) 172.3
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Please guys, answer was given as neutronBut I think it is proton.
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No. Answer give is a.Please explain how?
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It was given 2*Even I had got1/2Thanks =)
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If you have NCERT,You will see a quote by Richard Feynman (prominent physicist and Nobel Prize winner for physics) that says there is no clear difference anyone can decipher.HOWEVER, 12th grade students these days are so smart that we have to learn 4 points for exams and go ;)hehe.
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26. The power of combination of a convex lens of focal length 50 cm and concave lens of focallength 40 cm is
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Thanks alot guys =)Really helped =)
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I want the answer!I got 2:1 but it was given 1:2
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Are you sure?Answer was given 'Forced vibration'Even I thought it should be resonance.
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(52) In a region, steady and uniform electric and magnetic fields are present. These two fieldsare parallel to each other. A charged particle is released from rest in this region. The path ofthe particle will be a(a) circle(b) helix(c) straight line(d) ellipse
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(51) A material ?B? has twice the specific resistance of ?A?. A circular wire made of ?B? has twicethe diameter of a wire made of ?A?. Then for the two wires to have the same resistance, theratio A / B of their respective lengths must be
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40. Let the potential energy of electron in hydrogen atom in the ground state be regarded aszero. Then its potential energy in the first excited state will be(a) 20.4 eV(b) 13.6 eV(c) 3.4 eV(d) 6.8 eV(e) 10.2 eV
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27. Which of the following particles is unstable(a) Proton(b) Alpha particle(c) Neutron(d) Electron
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23. The thermocouple cannot act as(a) Thermometer(b) Voltmeter(c) Refrigerator(d) a.c generator
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