0 5 Scale

Practical Based Assessment worksheets for SSC-*

Practical No:01

To measure are and volume of solid cylinder using vernier caliper. Note: Fill the relevant bubble for each part.

i. Which is the smallest measurement that is possible by vernier caliper?

[0.5]

a) Least count c) Actual reading

b) Main scale division d) Vernier scale division ii. Zero error is given by the formula .

[0.5]

a) Actual reading = Main scale – Vernier scale – (Zero error) b) Actual reading = Main scale + Vernier scale – (Zero error) c) Actual reading = Main scale + Vernier scale + (Zero error) d) Actual reading = Main scale * Vernier scale – (Zero error) iii. The least count of Vernier caliper is containing 10 Vernier scale divisions? a) 0.005mm b) 0.1mm

c) 0.05 mm

d) 0.0001mm

Practical NO:02

Find the zero error and the correct reading of the vernier calipers below. 1. 3.

2.

Practical No:04

Q.1: Consider an object is placed between the spindle and anvil of micrometer screw gauge.

Answer the following questions.

i. What is the main scale reading: ii. What is the circular scale reading: iii. What is the pitch of screw gauge: iv. What is the diameter of object ii. Explain the term "least count" as applied to a screw gauge. How is it calculated? iii. How can one minimize errors when taking measurements with a screw gauge? iv. How pitch is related to precision of instrument? Relevant MCQS

1.The distance through which screw advances when it is rotated through one division of the head scale is

A. Zero Correction B. Least Count C. Pitch D. Zero Error 2.The head of scale of screw gauge contains 100 divisions and its pitch is 1mm.what is least count of screw gauge.

A.0.001mm B.0.01mm C.0.1mm D.0.05mm

3.A carpenter while driving a screw through a wooden block of thickness 1cm,observe that he has to rotate the screw 10times for the purpose The pitch of screw is A.1/10cm B.10cm C.1/100cm D.1cm

Section-A (7 Marks) Note: Attempt

all questions and answer the questions within the provided spaces. Q#01: Screw gauge is used to measure the thickness of metal strip as shown in the figure. i. What is main scale reading? = cm (0.5) ii. What is Circular scale reading? = cm

(0.5)

iii. What is thickness of the wire? = cm

(0.5)

iv) Write the formula to calculate as L.C of screw gauge. (1) v) Find the Least Count if: (1) Number of Circular scale division is 50. (1) Pitch of the Screw gauge = 0.5 mm.

vi. Find the Zero Error as shown in the figure. (1) vii. Find zero correction as shown in the figure. (1) RELEVENT MCQS (3 X 0.5=1.5)

Note: Fill the relevant bubble for each part.

i. Which one of the instruments is more precise?

a. Vernier Caliper b. Screw Gauge

b. Meter rule d. measuring tape ii. Smaller division on main scale for pitch 01 mm is:

a. 50 mm b. 100 mm

Least Count =?

c. 1 mm d. 10 mm iii. The pitch of your laboratory screw gauge is a: a. 0.5 mm b. 5 mm

c. 1.5 mm d. 10 mm

Section-B (3 Marks)

Relevant Short Question

i. Name two scales of Screw Gauge.

ii. How the least count of screw gauge be calculated. iii. What is range of your laboratory screw gauge in milli meter? iv. If zero error of screw gauge = -0.5 mm. Find zero correction. v. If zero error of screw gauge = +0.5 mm. Find zero correction. Guideline to calculate Zero error of screw Guage

Practical N0:04

Find relationship between load and extension by drawing a graph. Note: Attempt all questions and answer the questions within the provided spaces. Q.1 Read the Data Carefully and Answer the Following Questions. Apply the concepts of Hooke’s law and answer the following questions.

Load (N)

2.5

5

7.5

10

Extension (m)

4

8

12

16

i. Find Value of Spring Constant = K= Load/x = = N/m ii. Does this data follow Hooks Law? = iii. What is unit of spring constant? = iv. Define Following terms and Calculate Results.

a) Define Restoring Force?

b) Define Term Elastic Limit?

c) Why steel is said to be more elastic than iron ? [01] d) Define Newton meter? [01]

Practical No:05

To find the density of a body heavier than water by Archimedes Principle? i. ARCHIMIDES PRINCIPLE is used to find ?

a) Pressure c) Density

b) Spring Constant d) Elasticity

ii. If there is 200 cm3 water in beaker then it’s mass will

.

a) 10kg b)200kg

c)100kg d)1kg

iii.Unit of upthrust Force is

a.KN b)m/s

c.N d.Pa

SECTION-B

Q. 2 Write short answers of the following questions. i. Define Archimedes Principle ?

ii. What is buoyant force?

iii. Show that Young’s Modulus and Stress have same units? Practical No:06

Find weight of unknown object using Principle of moments. Example:01

Find the unknown value by using principle of moment. 1.

2.

3. write down relevant equations to calculate the results. 4.How would 30kg son balance his 60kg father on a see-saw? 4.Why applying force on hinges does not produce rotation in door? 5.write three factors that effect the torque created by a force relative to a specific pivot point? Practical NO:07

To find specific Heat by method of mixture using polystyrene cups (use container as negligible heat capacity)

Answer the following questions.

1. How do you ensure that polystyrene cups are well insulated and don’t exchange heat with surroundings? 2.How does use of lid on calorimeter effect the experiment? 3.How does mass of substance effect specific heat calculation? 4.what are common applications of specific heat values in real life? 5.Explain difference between heat capacity and specific heat capacity ? Practical No:08

To find acceleration of a ball rolling down an angle iron by drawing graph between 2S and

1. How does “angle’s iron length” influence the acceleration? 2.How does initial velocity of ball impact the acceleration? 3.what does slope of graph represent?

4.what are the units of measurements for acceleration in this experiment? 5.Explain how does the slope of graph represents relates to acceleration of ball? 6. How does angle of inclination of angle iron effects the acceleration? Practical No:09

To Find value of “g” by free fall method.

Answer the following questions.

1.is the value of g constant?

2.Diffrentiate g and G?

3.Does value of g changes with altitudes?

4.what happens to ‘g’ if you drop an object on moon,where there is no atmosphere? 5.why is it necessary to repeat experiment multiple times? Practical No:10

Investigate the relationship between force of limiting friction and force of normal reaction to find value of co-efficient of friction. 1.what is Normal reaction in context of this experiment? 2.what are SI units of co-efficient of friction?

3.what are Physical meaning of co-efficient of friction greater than 1 and less than 1?

4.why a frictionless pulley being used?

5. sometimes a car or a bus gets stuck in the deep mud.it is difficult to move it out of mud. Explain why?

Contact this candidate