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A cylindrical tube open at both ends has a fundamental frequency n in air. The tube is dipped vertically in water so that half of it is in water . The fundamental frequency of air column is a) n b)n/2 c) 3n/2 d) 3n/4 ...
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A car accelerates from rest at a constant rate a for sometime after which it decelerates at a constant rate b to come to rest. If the total time lapse is t second.then the max. velocity reached is: a) abt2/a+b b) abt/a-b C) a ...
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Which one of the following is true? (a) log(x+ y) = logx + logy (b) log xy = logx logy (c) log x / y = log x / log y (d) None of these ...
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You are given the reaction NH2 + 3Cl2 → NCl2 + 3HCl Vol of NH3 required for reacting with a litre of Cl2 will be (a) 9 litres (b) 6 litres (c) 13 litres (d) None ...
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The resistance of the shunt required to make the range n times for an ammeter of ressistance R is (a) nR (b) (n –1)R c) R/(n –1) (d) R/n ...
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F(x) = sin x + cos x, the maximum value of F(x) is (a) 1 (b)√ 2 (c) √3 (d) 2 ...
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The number of subsets of a set of n elements is (a) n (b) 2n (c) 2n (d) n2 and plzz give some xplaination about sets as i have just passes class 10th and want to learn sets for a scholrship exam ...
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When effort is applied parallel to the base of an inclined plane (angle of inclination θ) its mechanical advantage is equal to (a) tan θ (b) 1/ tan θ (c) sin θ (d) 1/ sin θ ...
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Two sides of a triangle are of lengths 2a and 2b and contain an angle of 120°. If the angle opposite the side 2a is θ, tan θ is equal to (a) a 2 /a + 2b (b) a 3 /2a + b (c b 3 /a + 2b (d) b 3 /2a + b ...
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I know the question i m going to ask may immediately alienate me from a large number of readers(specially girls) but then too i m asking it that Why r most of the girls unable to crack IIT-JEE ?? ...
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A sound wave has a frequency of 2 KHz and wavelength of 35 cm. How long will it take to travel 1.4 km. (a) 600m/s (b) 700m/s (c) 800m/s (d) 900m/s in this question v have to find out time and the ans. r given in m/s and i got ...
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natural oxygen consists of 2 types of atoms one having a mass of 16 and the other having a mass of 18,these atoms are found in what proportion??? ...
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I am presently in class 10 and have the basic books of PCM needed for JEE but have also got some old books and want to know whether they’ll b useful or not they r I.E Irodov (nice book certainly but of yr 2000) Reactions Re ...
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I m presently in class 10 and will b joing a reputed coaching institute from 8th april (for IIT-JEE) which is of 4 1/2 hrs and held 4 days a week. and my school demands 80% attendence so here goes my question shud i change my ...
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Solid sodium bicarbonate was placed on a strip of pH paper. The colour of the strip - (a) turned blue (b) did not change (c) turned green and suddenly yellow (d) turned light pink ...
