Recent questions tagged marks1

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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`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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 ...........

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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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

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Which amongst the following statement is incorrect regarding

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Choose the incorrect statement out of the

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Given that T stands for time period and `l` stands for the length of simple pendulum. If g is the acceleration due to gravity, then which of the following statements about the relation `T^2= l'/'g` is

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Match the following columns. Column I Column II A. Capacitance p. `'volt (ampere)'^(-1)` B. Magnetic induction q. `'volt-sec(ampere)'^(-1)` C. Inductance r. `'newton (ampere)'^(-1)` `('metre')^(-1)` D. Resistance s. `'coulomb'^2``'(joule)'^(-1)`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Match the Column I (unit) with Column II (value) and select the correct option from the codes given below Column I Column II A. 1 are p. `200 mg` B. 1 bar q. `1.013 xx 10^5 Pa` C. 1 carat r. `10^2 m^2`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Names of units of some physical quantities are given in Column I and their dimensional formulae are given in Column II and select the correct option from the codes given below. Column I Column II A. Pa-s P.`[L^2T^(-2)K^(-1)]` B. `Nm-K^(-1)` q.`[MLT^(-2)A^(-1)K^(-1)]` C. `J kg^(-1) K^(-1)` r. `[ML^(-1)T^(-1)]` D. `Wb m^(-1) K^(-1)` s. `[ML^2T^(-2)K^(-1)]`

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: Unit chosen for measuring physical quantities should not be easily reproducible. Reason: Unit should change with the changing physical conditions like temperature, pressure,

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion The unit used for measuring nuclear cross-section is ‘barn’. Reason 1 barn `= 10^(-14)

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: When we change the unit of measurement of a quantity, its numerical value changes. Reason: Smaller the unit of measurement smaller is its numerical

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: Parallax method is used for measuring distances of nearby stars only. Reason: With increase in the distance of star from earth, the parallactic angle becomes too small to be measured

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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Assertion: Out of two measurements `l = 0.7 m and l = 0.70 m`, the second one is more accurate. Reason: In every measurement, the last digit is not accurately

asked Mar 19, 2022 in 11th Physics by varun (6.7k points)

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