Your message is too short
Your message is spammy
» »

PHYSICS PRACTICAL NECO 2014 FREE EXPO ANSWERS. here






Physics real answers

(1a) Number of oscillation = 10
{NOTE: this sign ^ means Raise to power}
S/N | L(cm) | T(s) | T=t/10(s) | T^2(s)^2 | L(cm)^3
1. | 90.00 | 4.70 | 0.470 | 0.2209 | 729000
2. | 85.00 | 4.50 | 0.450 | 0.2025 | 614125
3. | 80.00 | 4.30 | 0.430 | 0.1849 | 512000
4. | 75.00 | 4.00 | 0.400 | 0.1600 | 421875
5. | 70.00 | 3.80 | 0.380 | 0.1444 | 343000
(Ix) Slope(s),= 720,000 - 200,000/ 0.225 - 0.11
S= 520000/0.115
S= 4521739.13cm^3/s^2
(X) PRECAUTIONS
(I) I made sure rigid support of the apparatus
(ii) I avoided error due to parallax when reading my
stopwatch
(iii) I made sure I oscillate at small angle
(Iv) I minimized draught

(1bi) The mas M series as an oscillator

(1bii)
(I) Simple pendulum bob
(ii) Loaded test tube
(iii) Loaded spiral spring
(Iv) Skin of talking drum
(V) Helical spring

(3a)
E.M.F (E) = 3.00v , Io = 0.62A
S/N | PJ=L(cm) | I(A) | y=E/A(v/A) |
1. | 20.00 | 0.58 | 5.172 |
2. | 30.00 | 0.50 | 6.000 |
3. | 40.00 | 0.45 | 6.667 |
4. | 50.00 | 0.40 | 7.500 |
5. | 60.00 | 0.35 | 8.571 |
6. | 70.00 | 0.32 | 9.375 |
(Vii)
Slope(s)= Y2 - Y1 / L2 - L1
S = 10.20 - 4.00/ 80 - 7
S = 6.20/73
S= 0.0849v/A
The intercept C on the vertical axis = 2.70v/A
(Viii)
K = Io C
K = 0.62 x 2.70
K = 1.674

(Ix)PRECAUTIONS
(I) I ensured hight connection of the wire of all the instrument use
(ii) I maintained steady flow of current before taking my reading
(iii) I made sure that I removed the key after each reading to avoid drained of the cell
(Iv) I avoided error due to parallax on ammeter
(V) I made sure that the jockey is not dragged on the wire of the potentiometer

(3bi)
The key K.
This is because the key serves a switch which does not drawn any current or voltage from the source of E.M.F

(3b)
From the defination of Resistivity
P = RA/ L
But A = pai D^2/ 4
P = R pai D^2/4L
P4L = pai R D^2
L = pai R D^2/ 4P
Where P is the resitivity of the material.

Edited by Naijabams.com










Related Article


Posted By KellyChi On 11:04 Wed, 04 Jun 2014

Comments:0 || Views:

Comment
Name







.....................

Please LOGIN or REGISTER To Gain Full Access To This Article