SRM VALLIAMMAI ENGINEERING COLLEGE
(An Autonomous Institution)
SRM NAGAR, KATTANKULATHUR – 603 203
PHYSICS PRACTICALS MANUAL
1901108 - PHYSICS LABORATORY
(First semester B.E/B.Tech. students for the Academic Year 2022-2023)
Prepared by
Dr.H.Krishnan, Dr.M.Anbuchezhiyan Dr.K.Thiruppathi,
Mrs. D. Praveena, Dr.S.Gandhimathi,
Dr.R. Nithya Balaji, Mrs. R. Sasireka, Mrs.S.Sowmiya
Mrs. Ramya Rajan.M.P & Dr.S.Padmaja
Department of Physics
(Private circulation only)
, SRM VALLIAMMAI ENGINEERING COLLEGE
(An Autonomous Institution)
SRM NAGAR, KATTANKULATHUR – 603 203
DEPARTMENT OF PHYSICS
Instructions to the students
The following instructions must be followed by the students in their laboratory classes.
1. Students are expected to be punctual to the lab classes. If they are late, they will be considered
absent for that particular session.
2. Students should strictly maintain the dress code.
3. Students must bring their observation note, record note (completed with previous experiment)
and the calculator to every lab class without fail.
4. Students are advised to come with full preparation for their lab sessions by
(i) Reading the detailed procedure of the experiment from the laboratory manual.
(ii) Completion of observation note book (i.e.) Aim, Apparatus required, Formula (with
description), least count calculation, diagrams and the tabular column should be written in the
observation note before entering into the laboratory.
5. Data entry in the observation note book must be by pen only.
6. Students must get attestations immediately for their observed readings.
7. Students should complete their calculations for their experiments and get it corrected on the
same day of that experiment.
8. Students who miss observation, record note they have to do the experiment once again and get
it corrected.
9. Class assessment marks for each experiment is based only on their performance in the
laboratory.
10. Record note has to be completed then and there and get corrected when the students are coming
for the next lab class.
11. Students must strictly maintain silence during lab classes.
12. If any of the students is absent for the lab class for genuine reasons, he/she will be permitted to
do the experiment during the repetition class only.
13. Students are advised to perform their experiments utmost care.
, CONTENTS
PAGE
S. No EXPERIMENTS NO.
1 Determination of rigidity modulus – Torsion pendulum. 2
Determination of Young’s modulus by non-uniform
2 8
bending method.
a) Determination of wavelength and particle size using
Laser.
3 12
b) Determination of acceptance angle in an optical fiber.
4 Determination of thermal conductivity of a bad conductor – 20
Lee’s Disc method
Determination of wavelength of mercury spectrum –
5 26
Spectrometer grating.
- Data of physical constants & standard values
Annexure 31
- Viva-voce Questions and Answers
, SRM Valliammai Engineering College, Department of Physics
L
Fig.1.1. Torsional Pendulum
To find the time period of oscillations
Length of suspension wire l = ……….cm
Time for 10 oscillations
Time period
Position of equal masses
(mean/10)
Trial 1 Trial 2 Mean
Unit second second second second
Without masses To =
Masses at closest
distance.
d1 = ……… x 10-2 m T1 =
Masses at maximum
distance.
d2 =……….x 10-2 m T2 =
Page | 1
(An Autonomous Institution)
SRM NAGAR, KATTANKULATHUR – 603 203
PHYSICS PRACTICALS MANUAL
1901108 - PHYSICS LABORATORY
(First semester B.E/B.Tech. students for the Academic Year 2022-2023)
Prepared by
Dr.H.Krishnan, Dr.M.Anbuchezhiyan Dr.K.Thiruppathi,
Mrs. D. Praveena, Dr.S.Gandhimathi,
Dr.R. Nithya Balaji, Mrs. R. Sasireka, Mrs.S.Sowmiya
Mrs. Ramya Rajan.M.P & Dr.S.Padmaja
Department of Physics
(Private circulation only)
, SRM VALLIAMMAI ENGINEERING COLLEGE
(An Autonomous Institution)
SRM NAGAR, KATTANKULATHUR – 603 203
DEPARTMENT OF PHYSICS
Instructions to the students
The following instructions must be followed by the students in their laboratory classes.
1. Students are expected to be punctual to the lab classes. If they are late, they will be considered
absent for that particular session.
2. Students should strictly maintain the dress code.
3. Students must bring their observation note, record note (completed with previous experiment)
and the calculator to every lab class without fail.
4. Students are advised to come with full preparation for their lab sessions by
(i) Reading the detailed procedure of the experiment from the laboratory manual.
(ii) Completion of observation note book (i.e.) Aim, Apparatus required, Formula (with
description), least count calculation, diagrams and the tabular column should be written in the
observation note before entering into the laboratory.
5. Data entry in the observation note book must be by pen only.
6. Students must get attestations immediately for their observed readings.
7. Students should complete their calculations for their experiments and get it corrected on the
same day of that experiment.
8. Students who miss observation, record note they have to do the experiment once again and get
it corrected.
9. Class assessment marks for each experiment is based only on their performance in the
laboratory.
10. Record note has to be completed then and there and get corrected when the students are coming
for the next lab class.
11. Students must strictly maintain silence during lab classes.
12. If any of the students is absent for the lab class for genuine reasons, he/she will be permitted to
do the experiment during the repetition class only.
13. Students are advised to perform their experiments utmost care.
, CONTENTS
PAGE
S. No EXPERIMENTS NO.
1 Determination of rigidity modulus – Torsion pendulum. 2
Determination of Young’s modulus by non-uniform
2 8
bending method.
a) Determination of wavelength and particle size using
Laser.
3 12
b) Determination of acceptance angle in an optical fiber.
4 Determination of thermal conductivity of a bad conductor – 20
Lee’s Disc method
Determination of wavelength of mercury spectrum –
5 26
Spectrometer grating.
- Data of physical constants & standard values
Annexure 31
- Viva-voce Questions and Answers
, SRM Valliammai Engineering College, Department of Physics
L
Fig.1.1. Torsional Pendulum
To find the time period of oscillations
Length of suspension wire l = ……….cm
Time for 10 oscillations
Time period
Position of equal masses
(mean/10)
Trial 1 Trial 2 Mean
Unit second second second second
Without masses To =
Masses at closest
distance.
d1 = ……… x 10-2 m T1 =
Masses at maximum
distance.
d2 =……….x 10-2 m T2 =
Page | 1
