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A body moves with speed 20m/sec for 10 sec and then with 30m/sec for some distance. The average speed may be (A) 8m/sec (B) 15m/sec (C) 25m/sec (D) all of these are possible ...
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Among KO2, AlO2-, BaO2 and NO2+, unpaired electron is present in NO2+ and BaO2 KO2 and AlO2- KO2 only BaO2 only ...
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If f :N→N such that f(f(x))=3x; Then find f(2013) ...
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What is the capacitance of a capacitor having plates of area A1 & A2 at a distance d? Please post explanation as well. ...
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Write the following function in the simplest form :- tan_1√ 1-x/1+x ...
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At time t=0 string A is cut, then what will be the maximum compression in the spring if spring constant is K.(Assume surfaces are smooth and initially spring was at its natural length) *Image* ...
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Mass of each block is 1 Kg. Find the minimum value of F so that sliding occurs at both the surfaces. *Image* ...
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At time t=0 string A is cut, then what will be the maximum compression in the spring if spring constant is K.(Assume surfaces are smooth and initially spring was at its natural length) *Image* ...
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If a, b, c are the sides of triangle ABC satisfying log(1+c/a) + log a – log b = log 2. Also a(1 – x2) + 2bx + c(1 + x2) = 0 has two equal roots. Find the value of sin A + sin B + sin C. ...
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Assertion: In a standing wave x=0 is a node. Then total mechanical energy lying between x=0 and x= λ/4 is not equal to the energy lying between x= λ/4 and x= λ/2 . Reason: In standing waves different particles oscillates w ...
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Assertion: If pressure of an ideal gas is doubled and volume is halved, then its internal energy will remain unchanged. Reason: Internal energy of an ideal gas is a function of temperature only. ...
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Assertion: In series L-C-R circuit, voltage will lead the current function for frequency greater than the resonance frequency. Reason: At resonance frequency, phase difference between current function and voltage function is ...
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Assertion: Electric field produced by a variable magnetic field can't exert a force on a charged particle. Reason: This electric field is non-conservative in nature. ...
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Assertion: In series combination, charges on two capacitors are always equal. Reason: If charges are same, the total potential difference applied across two capacitors will be distributed in inverse ratio of capacities. ...
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Assertion: A charge particle is moving in a circle with constant speed in uniform magnetic field. If we increase the speed of the particle to twice, its acceleration will became four times. Reason: In circular path of radius ...
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Assertion: A small electric dipole is moved translationally from higher potential to lower potential in uniform electric field. Work done by electric field is positive. Reason: When a positive charge moved from higher to lowe ...
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Assertion: A solid sphere and a hollow sphere are rolling on the ground with same total K.E. If transnational K.E of solid sphere is K, then translation energy of hollow sphere should be greater than k. Reason: In case of hol ...
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