# Light and Test Paper-01 Class

Topics: Light, Units of measurement, Measurement Pages: 2 (308 words) Published: August 8, 2013
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)

[1]

[1]

[1] [2]

5.

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

[2]

6.

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

[2]

7.

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

[2]

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.

[3]

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?

[3]

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

[3]

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?

Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks