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Write S.I unit of luminous intensity and

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Calculate the time taken by the light to pass through a nucleus of diameter `1.56 × 10^(-16)` m. (speed of light is `3× 10^8

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If force (F) acceleration (A) and time (T) are taken as fundamental units, then find the dimension of

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Two resistances `R_1 = 100 ± 3Ω and R_2 = 200 ± 4Ω` are connected in series. Then what is the equivalent

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If velocity, time and force were chosen the basic quantities, find the dimensions of

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Young’s modulus of steel is `19× 10^(10) N`/`m^2`. Express it in dynes `cm^2`. Here dynes are the C.G.S unit of

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The velocity υ of water waves may depend on their wavelength λ density of water ρ and the acceleration due to gravity g. Find relation between these quantities by the method of

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The force acting on an object of mass m traveling at velocity υ in a circle of radius r is giving by `F=(mv^2)/r` The measurements recorded as m `m= 3.5kg +-0.1``υ = 20 m'/'s +-1 m'/'s``' '` `r=12.5m+- 0.5 m` Find the maximum possible (1) fractional error (2) % error in the measurement of force. How will you record the

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What is the difference between `A^o` and

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Define S.I. unit of solid

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Name physical quantities whose units are electron volt and

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When a planet X is at a distance of 824.7 million kilometers from earth its angular diameter is measured to be `35.72^(11)` of arc. Calculate the diameter of

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A radar signal is beamed towards a planet from the earth and its echo is received seven minutes later. Calculate the velocity of the signal, if the distance between the planet and the earth is

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Give two methods for measuring time

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Find the dimensions of latent heat and specific

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in Vander Waal’s equation

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E, m, l and G denote energy, mass, angular momentum and gravitational constant respectively. Determine the dimensions of

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(a) State which of the following are dimensionally current(i) Pressure = Energy per unit volume(ii) Pressure = Momentum × volume × time(b) The density of cylindrical rod was measured by the formula:- `P=(4m)/(piD^2I)`The percentage in m, D and l are `1%, 1.5% and 0.5%.` Calculate the % error in the calculated value of

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The number of significant figures in 0.06900

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The sum of the numbers 436.32, 227.2 and 0.301 inappropriate significant figures

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