Question

From questions 1 to 13: 3 pd lags the current by (d) 30 In an RC cincuit, the voltage across the capacitor 2. The impedance of an Inductor with inductance 1 Henry for 10 Hz AC signal s. number of turns of the primary coil to the secondary coil? an LoR circuit when X X R, the phase difference between current and voltage is (d) 20 ? (b) 2 ? (c) 10 (a) ? 3 A step up transformer is used to increase the voltage by 3 times. What should be the ratio of the (c) 0.33 (d) 6 (a) 1 (b) 3 (c) 45 (d) 120 (a) 90(b) 30 egrees 5. Alight ray is incident on a mirror at 30 degrees. The angle of reflection ..d (a) 60 (b) 30 (c) 45 (d) cannot be said 6 The ratio of the refractive indices (n/ni) oftwo media is 1.1. The ratio of the velocity of light(v:/vs) in these two media is. (a) 1.1(b) 0.91 (c) 1 (d) 0.96 In question 6, if the angle of incidence in medium 1 is 40 degrees, angle of refraction in medium 2 s 7. (a) 125 (b) 39.5 (c) 35.8 (d) 45.8 8 What is the critical angle for glass-air interface in degrees? nglass 1.5, nair 1.0 (a) 41.8 (b)39.8 (c) 40 (d) 48 . The refractive index of glass is highest or.coo of light (a) Red (b) Green (c) Blue (d) Yellow 10. The magnification of an image formed by a spherical mirror for a real object is given as-3. Which one is true? (a) The lmage is upright and is formed by a concave mirror (b) The image is upright and is formed by a convex mirror (c) The image is inverted and is formed by a concave mirror (d) The image is inverted and is formed by a convex mirror 11. Theoretically the maximum possible magnification for a biconvex len s i.. (a) 1 (b) 0 (c) 100(d) 50

Answer 1

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