Recent questions in 11th Physics

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The respective number of significant figures for the numbers `23.023, 0.0003 and 2.1 xx 10^(-3)`

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If 3.8 x 10-6 is added to 42x 10'6 giving due regard to significant figures, then the result will

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The numbers `5.355 and 5.345` on rounding off to 3 significant figures will

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If mass M, distance L and time T are fundamental quantities, then find the dimensions of

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Let `l, r, c and v` represent inductance, resistance, capacitance and voltage, respectively. The dimension of `l/(rcv)` in SI rev units will

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Obtain the dimensional formula for universal gas

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Which two of the following five physical parameters have the same dimensions? I. Energy density II. Refractive index III. Dielectric constant IV. Young’s modulus V. Magnetic

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If `P ,Q, R` are physical quantities, having different dimensions, which of the following combinations can never be a meaningful

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The potential energy of a particle varies with distance x from a fixed origin as `U=(Asqrtx)/(x+B)`, where A and B are constants. The dimensions of AB

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In the formula, `X = 3YZ^2, X and Z` have dimensions of capacitance and magnetic induction. The dimensions of Y in MKSQ system

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If the velocity `v` (in `cms^(-1)`) of a particle is given in terms of `t` (in second) by the relation `v= at+b/(t + c)` then the dimensions of `a, b and c`

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A book with many printing errors contains four different formulae for the displacement y of a particle under going a certain periodic motion, where, a = maximum displacement of the particle, v = speed of the particle, T = time period of motion. Which are the correct formulae on dimensional

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If speed V, area A and force F are chosen as fundamental units, then the dimensional formula of Young’s modulus will

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If dimensions of critical velocity `v_c` of a liquid flowing through a tube are expressed as `[eta^x rho^y r^z]`, where `eta, rho and r` are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of `x, y and z` are given

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The density of a material in CGS system is `10 g cm^(-3)`. If unit of length becomes 10 cm and unit of mass becomes 100 g, the new value of density will

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When 1 m, 1 kg and 1 min are taken as the fundamental units, the magnitude of the force is 36 units. What will be the value of this force in CGS

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The solid angle subtended by the periphery of an area `1 cm^2` at a point situated symmetrically at a distance of 5 cm from the area i s ...........

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It is claimed that two cesium clocks, if allowed to run for 100 yrs without any disturbance may differ by only about `0.02 s`. Then the accuracy of the clock in measuring a time interval of `1s` is

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Photon is quantum of radiation with energy `E=hv`, where `v` is frequency and `h` is Planck’s constant. The dimensions of `h` are the same as that of

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Which amongst the following statement is incorrect regarding

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