Familiarity with the basic approach and observations of the experiments and activities in NCERT — Vernier callipers, screw gauge, simple pendulum, Young's modulus by Searle's method, surface tension by capillary rise, viscosity, speed of sound by resonance tube, specific heat by method of mixtures, resistance using metre bridge and Ohm's law, focal length of mirror/lens, refractive index by travelling microscope, characteristics of p-n junction.
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Q1 · Experimental Skills · EASY
A screw gauge has 50 divisions on its circular scale and a pitch of 0.5 mm. What is the least count of this screw gauge?
Q2 · Experimental Skills · MEDIUM
In a resonance tube experiment to determine the speed of sound, the first resonance is observed at 20 cm and the second resonance at 62 cm when a tuning fork of frequency 512 Hz is used. What is the speed of sound in air?
Q3 · Experimental Skills · MEDIUM
In an experiment to determine Young's modulus by Searle's method, a wire of length 2 m and diameter 0.5 mm is used. When a load of 4 kg is applied, the extension is 0.8 mm. Taking g = 10 m/s², what is Young's modulus of the wire material? (Use π = 3.14)
Q4 · Experimental Skills · EASY
In a metre bridge experiment, the balance point is obtained at 40 cm from the left end when an unknown resistance X is in the left gap and a resistance of 10 Ω is in the right gap. What is the value of X?
Q5 · Experimental Skills · HARD
In a travelling microscope experiment to determine the refractive index of water, a microscope is focused on a mark at the bottom of a beaker. The reading is 8.50 cm. When water is poured to a depth such that the microscope reading becomes 14.20 cm for sharp focus on the same mark, and the actual depth of water is measured as 7.60 cm, what is the refractive index of water?