ELECTRICITY
Readings=>
Vo=0.40v ; Io=0.60A
PJ(cm)| V(v) | I(A)
40.00 | 0.30 | 0.60
50.00 | 0.28 | 0.65
60.00 | 0.25 | 0.67
70.00 | 0.20 | 0.70
80.00 | 0.18 | 0.75
b.) Advantages of Potentiometer over voltmeter.
1. D potentiometer pass no current @ the time current is being taken
2. D potentiometer is more accurate than the voltmeter
3. D potentiometer does not have the type of error associated with a pointed instrument like d voltmeter.
PRECAUTIONS
- I ensured that the key was opened whenever the circuit was not in use so as to avoid the battery being run down;
- I avoided parallax error while taking readings frm both voltmeter and ammeter.
- I ensured tight connections to avoid fluctuation of d current.
UPTHRUST=>
Using d Spring balance provided, determine d weight of object of mass M=50g. Record ds weight as W1.
ii.) Determine d weight of d object when completly immersed in water cotained in d beaker, record the weight as W2.
iii.) Determine d weight of d object when it is completely immersed in liquid labelled 'L'. Record d weight as W3. Evaluate V=(W1-W3) and v=(W1-W2).
iv.) Repeat d procedure with d object of mass M= 10, 15, 20 and 25. In each cases, evaluate V=(W1-W3) and v=(W1-W2).
Plot d graph of 'V' on d vertical axis against 'v' nn d horizontal axis.
v.) Determine d SLOPE S1 of d graph.
State two (2) precautions to ensure accurate results.
b.) 1. A piece of Brass of mass 200g is hang on a sring balance from right support and completely immersed io Kerosene of Density 8.0*10^2kgm-
3. Determine d reading on d Spring balance.
(g=10ms-2 density of Brass =8.0*10^3kgm-3)
ii.) State Archimede's Principle and d law of floatation.
READINGS
W1(g)|W2(g)|W3(g)
50.0 |44.00 |46.00
100.0|90.00 |90.00
150.0|134.0|140.00
200.0|176.0|180.00
250.0|222.0|220.00
--------------------------
U =W1-W2(g) |
V=w1-w3(g)
6.00 | 4.00
10.00 |10.00
16.00 |10.00
24.00 |20.00
30.00 |30.00,,
Under electricity:-
what is ohm's law?Ohm's law
states that the current flowing
through a metallic conductor (e.g
wire) is directly proportional to
the potential difference across its
ends,provided that the
temperature and other physical
conditions of the conductor are
kept constant.
Under upthrust:-
what is archimedes principle?
archimedes principle states that
when a body is totally or partially
immersed in a fluid (liquid or gas)
,it experiences an upthrust which
is equal to the weight of fluid
displaced.
What is principle of floatation? It
states that an object wil float in a
fluid (liquid or gas)when the
upthrust exerted upon it by the
fluid in which it floats equals the
weight of the object.
Precautions:-
1. I avoid the masses being
touched the bottom of the flask
while immersed
2. I avoid parallax error while
taking my readings
3. I avoid oscillations while taking
readings
Readings=>
Vo=0.40v ; Io=0.60A
PJ(cm)| V(v) | I(A)
40.00 | 0.30 | 0.60
50.00 | 0.28 | 0.65
60.00 | 0.25 | 0.67
70.00 | 0.20 | 0.70
80.00 | 0.18 | 0.75
b.) Advantages of Potentiometer over voltmeter.
1. D potentiometer pass no current @ the time current is being taken
2. D potentiometer is more accurate than the voltmeter
3. D potentiometer does not have the type of error associated with a pointed instrument like d voltmeter.
PRECAUTIONS
- I ensured that the key was opened whenever the circuit was not in use so as to avoid the battery being run down;
- I avoided parallax error while taking readings frm both voltmeter and ammeter.
- I ensured tight connections to avoid fluctuation of d current.
UPTHRUST=>
Using d Spring balance provided, determine d weight of object of mass M=50g. Record ds weight as W1.
ii.) Determine d weight of d object when completly immersed in water cotained in d beaker, record the weight as W2.
iii.) Determine d weight of d object when it is completely immersed in liquid labelled 'L'. Record d weight as W3. Evaluate V=(W1-W3) and v=(W1-W2).
iv.) Repeat d procedure with d object of mass M= 10, 15, 20 and 25. In each cases, evaluate V=(W1-W3) and v=(W1-W2).
Plot d graph of 'V' on d vertical axis against 'v' nn d horizontal axis.
v.) Determine d SLOPE S1 of d graph.
State two (2) precautions to ensure accurate results.
b.) 1. A piece of Brass of mass 200g is hang on a sring balance from right support and completely immersed io Kerosene of Density 8.0*10^2kgm-
3. Determine d reading on d Spring balance.
(g=10ms-2 density of Brass =8.0*10^3kgm-3)
ii.) State Archimede's Principle and d law of floatation.
READINGS
W1(g)|W2(g)|W3(g)
50.0 |44.00 |46.00
100.0|90.00 |90.00
150.0|134.0|140.00
200.0|176.0|180.00
250.0|222.0|220.00
--------------------------
U =W1-W2(g) |
V=w1-w3(g)
6.00 | 4.00
10.00 |10.00
16.00 |10.00
24.00 |20.00
30.00 |30.00,,
Under electricity:-
what is ohm's law?Ohm's law
states that the current flowing
through a metallic conductor (e.g
wire) is directly proportional to
the potential difference across its
ends,provided that the
temperature and other physical
conditions of the conductor are
kept constant.
Under upthrust:-
what is archimedes principle?
archimedes principle states that
when a body is totally or partially
immersed in a fluid (liquid or gas)
,it experiences an upthrust which
is equal to the weight of fluid
displaced.
What is principle of floatation? It
states that an object wil float in a
fluid (liquid or gas)when the
upthrust exerted upon it by the
fluid in which it floats equals the
weight of the object.
Precautions:-
1. I avoid the masses being
touched the bottom of the flask
while immersed
2. I avoid parallax error while
taking my readings
3. I avoid oscillations while taking
readings
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