# Light and Test Paper-01 Class

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5.

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

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6.

Two resistances R1 = 100 ±3Ω and R2 = 200 ±4Ω are connected in series. Then what is the equivalent resistance?

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7.

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

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8.

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.

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9.

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?

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10.

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

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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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