2017-2018 Physics Experiment Exam Paper Score, I: Selection (4 marks each, total

Question

2017-2018 Physics Experiment Exam Paper Score, I: Selection (4 marks each, total 20 Marks) many significant digits hs 0.030500 ms . How stated as 2Three the average resul? messurements ofs are:2.55 m,2.56 m,2.59 m. Which of the following should be (A)2.56m (8)2.66m (C)2567m (D)2.57m 3. The final result of 25.234-3.23-1.5246-1 is (A) 26 (D) 25.9 8)25.9394 (C) 25.94 ie (A) Halk-metre rule (B) Metre rale (C)Micrometer screw gauge (D) Vemier calipers 4. Which of the following instrumonts should be used to measure the diameter of the wire? . The movement of a block is recorded, as shown in the Figure 1, the slope of the figure is (A) Displacement (B) Velocity (C) Acceleration (D) No meaning 20 E 15 10 1234 56789 10 Time (s) Figure 1 Figure 2 Section 2: Filled in the blanks (3 marks each, total 30 Marks) l. (a) The reading from the Vernier caliper in Figure 2 is - (mm.

Explanation / Answer

1. Number of significant digits in 0.030500 is 3.

2. Average of the three measurements is given by:

                   =(2.55+2.56+2.59)/3 = 2.57m

3. The final result of 25.234+3.23-1.5246-1 = 25.9394

4. the diameter of a wire is measured by micrometer screw gauge.

5. Since acceleration = change in velocity/time interval=dv/dt

    Hence the slope of the curve is acceleration.

Section 2.

1 a) The reading from vernier caliper in figure 2 is 1.12mm (considering the 7th line to be best coinciding)

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