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(a) 12 m(b) 16 m(c) 20 m(d) 24 m
(a) 80 m(b) 160 m(c) 200 m(d) 240 m
(a) 2:3(b) 3:2(c) √2:√3(d) √3:√2
16. Consider the following statements and select the incorrect statement.
(a) The presence of a large magnetic flux through a coil maintains a current in the coil if the circuit is continuous.(b) A coil of a metal wire kept stationary in a non- uniform magnetic field has an e.m.f induced in it.(c) A charged particle enters a region of uniform magnetic field at an angle of 85° to the magnetic lines of force, the path of the particle is a circle.(d) There is no change in the energy of a charged particle moving in a magnetic field although a magnetic force is acting on it.
17. A coil of circular cross-section having 1000 turns and 4 cm2 face area is placed with its axis parallel to a magnetic field which decreases by 10 -2 Wbm-2 in 0.01 s. The e.m.f. induced in the coil is:
(a) 400Mv(b) 200mV(c) 4mV (d) 0.4mV
18. In a Young’s double slit experiment, light of 500 nm is used to produce an interference pattern. When the distance between the slits is 0.05 mm, the angular width (in degree) of the fringes formed on the distance screen is close to:
(a) 0.17° (b) 0.57° (c) 1.7° (d) 0.07°
19. Given below are two statements:Statement I: If the Brewster’s angle for the light propagating from air to glass is , then Brewster’s angle for the light propagating from glass to air is π/2 – θBStatement II: The Brewster’s angle for the light propagating from glass to air is tan-1 (μg) where μg is the refractive index of glass.In the light of the above statements, choose the correct answer from the options given below:
(a) Both Statements I and Statement II are true.(b) Statement I is true but Statement II is false.(c) Both Statement I and Statement II are false.(d) Statement I is false but Statement II is true.
20. A shell is fired from a fixed artillery gun with an initial speed u such that it hits the target on the ground at a distance R from it. If t1 and t2 are the values of the time taken by it to hit the target in two possible ways, the product is t1t2
(a) R/4g (b) R/g (c) R/2g (d) 2R/g