SRM University 2007 B.Tech MODEL - Question Paper

(a) 1
(b) 0
(c) 0.5
(d) infinity
14. 2 sources are stated to be coherent, if they have
(a) constant phase difference, identical amplitude and identical frequency
(b) phase difference zero, amplitude identical and various frequency
(c) phase difference varying and amplitude various but identical frequency
(d) phase difference varying but amplitude and frequency identical
15. In Young’s double slit experiment, the separation ranging from the slits is halved and the
distance ranging from the slit and the screen is doubled then the fringe width will be
(a) halved
(b) unchanged
(c) doubled
(d) increased by four times the original
16. The magnetic susceptibility of a diamagnetic substance
(a) varies directly with temperature
(b) varies inversely with temperature
(c) is independent of temperature
(d) is positive and very large
17. The magnitude of the induced emf in a circuit is equal to the change of magnetic flux
linked with the circuit. This is
(a) Faraday’s 1st legal regulations
(b) Faraday’s 3rd legal regulations
(c) Lenz’s legal regulations
(d) Fleming’s legal regulations
18. To convert a galvanometer into an ammeter, which 1 of the subsequent is to be
connected to the galvanometer
(a) A low resistance in parallel
(b) A high resistance in series
(c) A high resistance in parallel
(d) A low resistance series
19. In a ruby laser population inversion is achieved by
(a) Aluminum oxide
(b) Chromium flash tube
(c) Xenon flash tube
(d) Chromium ions
20. Laser light is intense because
(a) It has very less number of photons that are in phase
(b) It has very less number of photons that are not in phase
(c) It has very large number of photons that are not in phase
(d) It has very large number of photons that are not in phase has that are in phase
21. Isotopes are atoms of the identical element having the identical number of
(a) protons and neutrons
(b) protons but various number of neutrons

Earning:   Approval pending.