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# Form 3 Physics Paper 3 End of Term 3 Examination 2021

Class: Form 3

Subject: Physics

Level: High School

Exam Category: Form 3 End Term 3 Exams

Document Type: Pdf

## Exam Summary

TUTORKE EXAMS
END OF TERM THREE EXAMINATION 2022

FORM 3 PHYSICS PP.3 (PRACTICAL)
SCHOOL:…………………………………………………………

232/3
PHYSICS
PAPER 3
TIME: 2 HRS 15MIN

INSTRUCTIONS TO CANDIDATES
1. Write your name and admission number in the spaces provided.
2. Answer all questions in the space provided.
3. All working must be clearly shown where necessary.
4. Non-programmable silent electronic calculation may be used.
5. Candidates should check the questions paper to ascertain that all pages are printed as indicated and that no question is missing.

Question 1
You are provided with the following apparatus
- Two complete retort stands.
- A metre rule
- Two pieces of thread (120cm and 20cm)
- A stop watch
- A piece of masking tape
- A pendulum bob
- A half metre rule
a) (i)
- Attach one end of string to the metre rule at the 10cm mark by fastening a loop of string tightly round the metre rule.
- Fix the string at this point with a piece of masking tape
- Tie the string in the second loop at 90cm mark. Fix this loop with another piece of masking tape.
ii) Attach the pendulum bob at the centre of the string – so that the centre of gravity of the bob is 15cm below the point of suspension (as shown in the figure below.)

b) (i) Measure the angle 2theta...........................1/2 mk

ii) Pull the pendulum bob towards you through a small distance release it and measure time “t” for 10 oscillations.
..............................1/2 mk
iii) Remove the masking tape slide the loops to the 12cm and 88cm marks. Refix the masking tape. Measure the angle 2theta and time“t” as before
iv) Repeat (iii) above with the loops at 15cm and 85cm, 20cm and 80cm, 25cm, and 75cm. 30 and 70cm, 35cm and 65cm marks.
v) Enter all your results in the table below.

c) (i) Plot a graph of T2(y-axis) against cos θ (5mks)

(ii) Determine the value of T2 at the point where the graph intercepts the y – axis. (1mk)

(iii) Given that the value of T2 at the point A where the graph cuts the y – axis is given by T2 = (0.6π^2)/K
use your result in (ii) above to determine the value of K. (3mks)

Question 2
Q2. You are provided with the following apparatus
● A voltmeter
● An ammeter
● A wire x mounted on a metre rule
● 6 connecting wires with crocodile clips
● Micrometer screw gauge
● A switch
● A jockey
● One new dry cell and a cell holder.
Proceed as follows:
a) Connect the apparatus provided as shown in the circuit below.

d).Plot a graph of potential difference, V(y-axis) against the Current I. (5mks)

e) Determine the slope of the graph (2mks)

f).Given that V= E – I r, use your graph to determine the value of;
(i) E (1mk)

(ii) r (1 mk)

g).Measure the diameter d of the wire x using the micrometer screw gauge.
d = __________________ mm ½ mk
____________________m (1/2 mk)

h) Dismantle the apparatus and set up the circuit as shown below.