CBSE TEST PAPER-01 CLASS - XI PHYSICS (Physical World & Measurement) Topic: - Physical World & Measurement 1. If x = at + bt2 where x is in meters and t is in seconds. What are the units of a and b? 2. Fill ups. (i) 3.0m/s2 = --------------------- km/hr2 (ii) 6.67 10-11Nm2/kg2 = ------------------------- g-1cm3s-2 3. 4. Write S.I unit of luminous intensity and temperature? Calculate the time taken by the light to pass through a nucleus of diameter 1.56 × 10-16 m. (speed of light is 3 × 108 m/s)
If force (F) acceleration (A) and time (T) are taken as fundamental units, then find the dimension of energy.
Two resistances R1 = 100 ±3Ω and R2 = 200 ±4Ω are connected in series. Then what is the equivalent resistance?
If velocity, time and force were chosen the basic quantities, find the dimensions of mass?
Young’s modulus of steel is 19 × 1010 N/m2. Express it in dynes cm2. Here dynes are the C.G.S unit of force.
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 dimension?
The force acting on an object of mass m traveling at velocity υ in a circle of mυ r The measurements recorded as m m = 3.5kg ± 0.1kg radius r is giving by F = 2
υ = 20m / s ± 1m / s r = 12.5m ± 0.5m Find the maximum possible (1) fractional error (2) % error in the measurement of force. How will you record the reading?
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