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Showing posts with label NEET 2011. Show all posts
Showing posts with label NEET 2011. Show all posts

49. A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 ms−2 , the velocity with which it hits the ground is

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49. A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 \(ms^{−2}\)  , the velocity with which it hits...

28. A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is

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6. A particle covers half of its total distance with speed v1 and the rest half distance with speed v2. Its average speed during the complete journey is

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102. Symbolic representation of four logic gate are shown below. Pick out which ones are for AND, NAND and NOT gates, respectively

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45. In forward biasing of the p − n junction ___ ?

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44. If a small amount of antimony is added to germanium crystal ___ ?

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43. In the following figure, the diodes which are forward biased, are ?

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42. Pure Si at 500 K has equal number of electron (ne) and hole (nh) concentrations of 1.5 × 1016 m−3 . Doping by indium increases nh to 4.5 × 1022 m−3 . The doped semiconductor is of ?

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41. A zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the diode is ?

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41. A zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the d...

55. A thin prism of angle 15° made of glass of refractive index $μ_1$ = 1.5 is combined with another prism of glass of refractive index $μ_2$ = 1.75. The combination of the prism produces dispersion without deviation. The angle of the second prism should be ?

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44. A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options best describe the image formed of an object of height 2 cm placed 30 cm from the lens?

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43. A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to the lens. The focal length of the lens is ?

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24. Which of the following is not due to total internal reflection ?

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A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is ?

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Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC, AC and AB, D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is ?

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Four electric charges +q, +q, −q and −q are placed at the corners of a square of side 2 L (see figure). The electric potential at point A, midway between the two charges +q and +q, is ?

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The electric potential V at any point (x, y, z), all in meters in space is given by V = 4x2 volt. The electric field at the point (1, 0, 2) in volt/ meter is ?

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A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will ?

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