Candidate no ___________
C.P. Goenka International School, Oshiwara
Class Test Term 1
Grade:
2022-23
Date:
Duration: 45 min
Subject:
Maximum Marks: 20
READ THESE INSTRUCTIONS FIRST
Write the candidate number on each page.
Write in dark blue or black pen only.
All the questions are compulsory.
The number of marks is given in [ ] at the end of each question or part question.
This document consists of 2 pages
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Candidate no ___________
Q1. Choose the correct option in following question
1. A student carries out a series of determinations of the
acceleration of free fall g. The table shows the results
g/ms–2
4.91
4.89
4.88
4.90
4.93
4.92
What can be said about this experiment?
A. It is accurate and precise.
B. It is accurate but not precise.
C. It is not accurate and not precise.
D. It is not accurate but is precise
2. The power loss P in a resistor is calculated using the formula P = V2/R. The uncertainty in the
potential difference V is 3% and the uncertainty in the resistance R is 2%. What is the
uncertainty in P?
A. 4%
B. 7%
C. 8%
D. 11%
3. A projectile is fired at an angle α to the horizontal at a speed u, as shown. What will be the
vertical and horizontal components of its velocity after a time t?
Assume that air resistance is negligible. The acceleration of free fall is g.
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Candidate no ___________
4. The diagram shows a square-wave trace on the screen of a
cathode-ray oscilloscope. A grid of 1 cm squares covers the
screen.
The time-base setting is 10 ms cm–1.
What is the approximate frequency of the square-wave?
A. 70 Hz
B. 140 Hz
C. 280 Hz
D 1400 Hz
5. A stone is thrown vertically upwards from a point X at time t ꞊ 0.
The variation with time t of the velocity v of the stone is shown.
What is the displacement of the stone from point X at time t ꞊ 3.0 s?
A. 15 m above X
B. 15 m below X
C. 25 m above X
D. 25 m below X
[Total = 5]
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Candidate no ___________
1. A student has a diffraction grating that is marked 3.5 × 103 lines per
m.
(a) Calculate the percentage uncertainty in the number of lines per
meter suggested by this marking.
Percentage uncertainty = ..................................... % [2]
(b) Determine the grating spacing.
Grating spacing = ............................................. mm [2]
(c) State the absolute uncertainty in the value of the spacing.
Absolute uncertainty = .................................. mm [1]
[Total – 5]
2. (a) Define Displacement
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
(b) Use your definition to explain how is it possible for a car to travel a certain distance and yet
have a zero displacement
………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………….. [3]
[Total – 3]
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Candidate no ___________
3. A ball is thrown from A to B as shown in Fig. 3.1.
Figure 3.1
The ball is thrown with an initial velocity V at 60° to the horizontal. The variation with time t of
the vertical component Vv of the velocity of the ball from t = 0 to t = 0.60 s is shown in Fig. 3.2.
(a) (i) Complete Fig. 3.2 for the time until the ball reaches B.
[1]
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Candidate no ___________
(ii) Calculate the maximum height reached by the ball
Height = ....................................................... m [2]
(iii) Calculate the horizontal component Vh of the velocity of the ball at time t = 0.
Vh = ................................................. m s−1 [2]
(iv) On Fig. 3.2, sketch the variation with t of Vh . Label this sketch Vh.
[2]
[Total – 7]
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