logo



student ONLINE CANDIDATES : 144




PAYMENT FOR WAEC AND JAMB EXPO HAS STARTED, PAY NOW!!!



neco runs

WAEC / NECO / NABTEB /GCE SUBSCRIPTION PAYMENT EXPO


HOW TO PAY FOR WAEC/ NECO/ NABTEB /GCE ANSWER:

ALL SCIENCE ANSWERS + PRACTICAL COST: N5,500

ALL ART OR COMMERICAIL ANSWERS COST #4,500

 

WHATSAPP US AND SEND:- EXAM TYPE + MTN-CARD + PHONE NUMBER + SUBJECT TO 09055986588 (ONLY ON WHATSAPP)

UPDATE: Our Waec, Neco and Nabteb Exam Runs Payment is on, Earlyanswer is 100% Legit (Invite Your Classmates,Friends Here)

Answer Page

Answer Page

Confirmation page

Verify NECO / WAEC Payment

EARLYANSWER OFFICIAL WHATSAPP GROUP

JOIN OUR GENERAL WHATSAPP GROUP




« PREVIOUS POST:

| NEXT POST:

»

2020 NABTEB PHYSICS PRACTICAL QUESTIONS/ANSWERS VERIFIED EXPO

 

TAKE NOTE:
^ Means raise to the power

Π Means ohm’s

^–¹ Means Raise to the power of minus 1 or inverse
=======================================

(1a)
Balance point G=50.00cm

TABULATE
S/N | m(g) | P(cm) | x(cm) | y(cm) | x^–¹ (cm^-1

UNDER S/N
1 2 3 4 5

UNDER m(g)
20.00 | 30.00 | 40.00 | 50.00 | 60.00

UNDER P(cm)
86.50 | 78.50 | 69.00 | 65.00 | 62.55

UNDER x(cm)
36.50 | 28.50 | 19.00 | 15.00 | 12.55

UNDER y(cm)
35.00 | 35.00 | 35.00 | 35.00 | 35.00

UNDER x^-1 (cm^-1)
0.027 | 0.035 | 0.053 | 0.067 | 0.080

(1av)
Graph

(1avi)
Slope = ∆m/∆x^–¹
=60 – 20 / 0.080 – 0.027
= 40/0.053
Slope, s = 754.72gcm

And

S/y = 754.72/35
=21.56g

(1avii)
Precautions
(i) I avoided the parallax error when reading the meter rule.
(ii) I ensued that the suspended masses did not touch the table

(1bi)
The moment of a force about a point is the product of the force and distance about that point i.e moment = Force × Distance The S.I unit of moment is Nm

(1bii)
The centre of gravity of a body is the point at which the resultant weight of the body appears to act.
The centre of gravity of a body is related to it’s stability because of
(i) The position of the centre of gravity:- The lower the position of C•G, the more stable it is and the more the position increases in height when slightly tilted, the more is the magnitude of it’s potential energy
(ii) The moment of the centre of gravity about a given axis when slightly tilted

(1biii)

Where m is the mass of the meter rule

Clockwise moment = Anti – clockwise moment
200 × 20 = 300 × m
4000=30m
m=4000/30
m=133.33g
=======================================

(3a)
Eo=3.0V
TABULATE

S/N | R(ohms) | V(V) | V^–1 (V^–1) | R^–1 (ohms^–1)

UNDER S/N
1. 2. 3. 4. 5.

UNDER R(ohms)
1.00 2.00 3.00 4.00 5.00

UNDER V(V)
1.80 2.00 2.20 2.50 2.70

UNDER V^–1 (V^–1)
0.56 0.50 0.45 0.40 0.37

UNDER R^–1 (ohms^–1)
1.00 0.50 0.33 0.25 0.20

(3av)
Graph

Slope, s = ∆V^–¹ / ∆R^–¹
= 0.67 – 0.35 / 1.0 – 0.11
= 0.32/0.89
Slope, s = 0.36ohmsv^–¹
=0.36A^–¹

Intercept k = 0.31v^–¹

(3avi)
T=S/K
=0.36/0.31
=1.16ohms

(3avii)
Precautions
(i) I ensured tight connection of connecting wires to the terminals
(ii) I ensured that the key was open after each reading so that the battery did not run down quickly

(3bi)
Electromotive force of a cell (Emf) is the potential difference across the terminal of the cell when it is not delivering any current to the circuit

(3bii)
Ohmic conductors are;
(i) Coppers
(ii) Aluminium
(iii) Silver

Non ohmic conductor are;
(i) Diode
(ii) Transistor

The unit of conductivity is (Πm)^–¹

(3biii)
E=3v
R=2 ohms
I=0.5A
r=?

I=E/R + r
0.5=3/2 + r
Cross multiply
3=0.5 (2 + r)
3=1 + 0.5r
Collect like terms
3–1 = 0.5r
2=0.5r
Divide both sides by 0.5
r=2/0.5
r=4 ohm’s
=====================================

(1)

(1bii)

(1)
Graph.

=====================================

(3)

(3biii)

(3)
Graph.


Posted by on 13th September 2020.

Tags:

Categories: NABTEB

HOW TO WIN MTN CARD FROM EARLYANSWER
 
CLICK HERE TO SHARE THIS WEBSITE TO YOUR WHATSAPP FRIENDS / GROUPS AND WIN MTN CARD NOW

Chat Admin After You Share To 20 People On Whatsapp to Redeem The Price

Click here to submit your phone number for free updates about WAEC, NECO, NABTEB, GCE.

2023/2024 EXAM RUNS UPDATES👇

CLICK HERE TO GET WAEC 2023 EXAM RUNS


CLICK HERE TO GET NECO 2023 EXAM RUNS


CLICK HERE TO GET NABTEB 2023 EXAM RUNS


Our Answer Page for All Examination

0 Responses

Leave a Reply

« PREVIOUS POST:

| NEXT POST:

»