Physics Practical XI (Science Group) - Marks Distribution According

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Physics Practical (First Year)

BOARD OF INTERMEDIATE EDUCATION, KARACHI
H.S.C PART I PRACTICAL EXAMINATION,
Physics 1

Time: 02 Hours Max. Marks 08 (Points: 80)

* Marks are written in blue*

Q.1: Using Vernier Callipers determine the volume of given solid cylinder and capacity of a test tube / tube.
(a) Note down

(i) The least count of vernier calipers - (1)
(ii) The zero error - (1)
(iii) Take two observations for diameter and length 'L' after solid cylinder. - (2)
(iv) Take two observations of internal diameter and depth of the test tube or tube. - (2)

(b) Calculate the volume of solid cylinder and capacity of test tube or tube using formula - (2)

Volume = 𝞹r²L and capacitor = 𝞹R²d

(c) Write down the result with proper units - (1)

Q.2: Using micrometer Screw gauge determine the volume of given sphere and area of cross section of the given wire.
(a) Note down

(i) The least count of Micrometer Screw gauge - (1)
(ii) The zero error - (1)
(iii) Take two observations for diameter of sphere. - (2)
(iv) Take two observations of diameter of wire. - (2)

(b) Calculate the volume of sphere and area of cross section of the wire using formula - (2)

V = 4/3 𝞹r³ and A = 𝞹R²

(c) Write down the result with proper units - (1)

Q.3: Using spherometer determine the radius of curvature of spherical surface and thickness of glass piece.
(a) Note down

(i) The least count of spherometer - (1)
(ii) Mean distance 'a' between the leg of spherometer - (0.5)
(iii) Take two observations for plane glass sheet (h1). - (1.5)
(iv) Take two observations for glass piece (h2). - (1.5)
(v) Take two observations for spherical surface (h3). - (1.5)

(b) Calculate the radius of curvature of spherical surface and thickness of glass piece using formula (2)

Radius of curvature R = ^a²/_6h + ^h/₂ and Thickness of glass piece = h₂ - h₁

g = 4𝞹² ^L/_T² - (2)

(i) Determine time for ten oscillations twice for each length given below - (6)

(a) 75cm | (b) 85cm | (c) 95cm | (d) 105cm | (e) 115cm

Draw graph between L and T² By choosing a suitable point on the graph (other than observation)
Calculate value of 'g'
(ii) Write down the result with proper units - (1)

Q.5: Verify the Laws of simple pendulum
(a) Law of length

(i) Take two readings for each given length
(a) 80cm | (b) 90cm | (c) 100cm - (3)
(ii) Plot graph b/w L and time period 'T' OR L and T² - (1)

(b) Law of amplitude

(i)Take two readings for each given amplitude
(a) 5cm | (b) 7cm | (c) 9cm - (3)
(ii) Plot graph b/w amplitude and time period 'T' - (1)

(b) Law of Mass

(i)Take two readings for each given mass
(a) m₁ = ___ | (b) m₂ = ___ | (c) m₃ = ___ - (3)
(ii) Plot graph b/w mass and time period 'T' - (1)

(c) Write down conclusive result - (1)

Q.6: Determine the surface tension of water by capillary method - (6)
(a) Calculate the value of surface tension using formula - (2)

T = ¹/₂ pgrh

(b) Write down the result with suitable units. - (1)

Q.7: Determine the refractive index of water using a concave mirror
(i) Draw ray diagram - (1)
(ii) Take two observation of radius of curvature of concave mirror without water (R₁) - (2.5)
(iii) Take two observation of radius of curvature of concave mirror with water (R₂) - (2.5)
(iv) Calculate refractive index of water by using formula - (1)

𝝁 = ^R₁ / _R₂

(v) Calculate the percentage error - (1)
(b) Write down result - (1)

Q.8: Find the focal length of convex lens by no parallax method using two pins
(a)

(i) Find out the approximate focal length = _____ - (0.5)
(ii) Draw ray diagram for any one position of object - (0.5)

(b) Record at least five observations by placing object pin at a distance - (5)

(i) Away from 2f (Two observations)
(ii) Equal to 2f (One observation)
(iii) Between 2f and f (Two observations)

(c)

(i) Plot a graph between 'p' and 'q'
(ii) By choosing a suitable point on graph (other than observation). Calculate focal length using formula - (2)
f = ^{p x q} / _{p + q}

(d) Write down the result with proper unit - (1)

Q.9: Determine the refractive index of the material of a prism by critical angle method
(i) Take three observations - (6)
(ii) Calculate refractive index for all observation with formula - (2)

𝝁 = ¹/ _SinC

and find its mean
(b) Write down result - (1)

Q.10: Determine speed of sound at 0℃ and at room temperature using two tuning forks of different frequencies and resonance tube apparatus.
(a) Note down room temperature t = ______ ℃ - (1)
(b)

(i) Record three observation for 1st resonating length by using 1st tuning fork - (2.5)
(ii) Record three observation for 1st resonating length by using 2nd tuning fork - (2.5)

(c)

(i) Calculate speed of sound at room temperature for each tuning fork using formula - (1)
V_t = 4Lf
and calculate mean
(ii) Calculate speed of sound at 0℃ using formula
V_o = V_t - 61t

(d) Write down the results with proper units - (1)

Q.11: Determine the refractive index of the material of a glass slab
(a) Take two observations along length - (3)
(b) Take two observations along breadth - (3)
(c) Calculate refractive index of glass using formula - (1)

𝝁 = ^{Real depth}/ _{Apparent depth}

(b) Write down result - (1)