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WorksheetsFORM 5 PHYSICS QUIZ 3
Total questions: 35
Worksheet time: 3hrs 55mins
It is work done to move a unit of electrical charge from one point to another point in electric field. This refer to
Current
Potential difference
Resistance
Power
Diagram shows voltmeter is placed
Parallel
Series
It is a rate of electrical charge flows. This refers to
Current
Potential diffrence
Resistance
Power
Potential difference is directly proportional to current flows in conductor under standard tempertaure and pressure.
This refer to
Current
Potential difference
Resistance
Ohm's Law
Resistance is a ratio of
V : l
V : C
V : Q
I : t
Between wire S and T. Which has higher resistance?
S
T
Wire S has lower resistance because
Resistance directly proportional to length
Resistance inversely proportional to length
Diagram shows a conductor with same length but different size. Which wire has low resistance?
S
T
Which of the graph obey the Ohm's Law
If 30 C of electrical charge flows through a wire in 2 minutes. Calculate the current flows.
0.15 A
0.25 A
1.5 A
2.5 A
Which of the formulae is correct about Ohm's Law?
V = IR
V =QR
VI = R
I = QR
Rate of flow of electric charge is
Electric current
Conventional current only
Electronic current only
Potential difference
Instrument which transfers energy to electric charge in a circuit is
Battery
Voltmeter
Ammeter
Galvanometer
If a current of 1A passes through a point in 1s then the charge passes that point is
2C
3C
1C
6C
Energy transfer per unit charge is
E.M.F
Current
Potential difference
Conventional current
Identify the conductor below
Cloth rag
Gold ring
Plastic bottle
Rubber eraser
Identify the insulator below
Aluminium foil
Rubber eraser
Paper clip
Gold ring
Current in a circuit depends on
Resistance
Potential difference
Both A and B
E.M.F
Thicker wire have ..........resistance than thinner wire.
more
less
the same
As the resistance in the circuit increases, the electric current
increases
decreases
stay the same
Good conductor are...... resistor
bad
good
Good insulator are ....... resistor.
bad
good
What characteristic impact resistance of material.
Thickness
Temperature
Length
All of the above
If the current increases, it could be because of...
Increase voltage
Decreasing resistance
Both
Which factor does not affect resistivity?
Length
Mass
Cross-sectional area
Temperature
The unit of resistivity is
Ω/m
Ω/m2
Ω.m
Ω.m2
The nichrome wire has a cross-sectional area of 1.3 × 10–7 m2 . Resistivity of nichrome = 1.1 × 10–6Ωm and a resistance of 53Ω. The length of the wire is
0.63m
63m
0.0063m
6.3m
A copper wire of length 2.5 m and cross-sectional area 2.4 × 10-7 m2 has a resistivity of 1.7x10-8Ωm. What is the resistance of the wire?
1.6x10-15Ω
1.0x10-14Ω
0.18Ω
5.6Ω
The equation for a material with circular cross sectional area is A=
4πd2
πr
2πd2
πr3
Resistivity
changes with conditions
relies on dimensions of the material
inversely proportional to resistance
a property of the material
A cylindrical conductor of length l, diameter D, and resistivity ρ has a resistance R.
What is the resistance of another cylindrical conductor of length l, diameter D/2, and resistivity ρ?
8R
4R
2R
R
A wire has a resistance R.
What is the resistance when both the length and radius of the wire are doubled?
4R
2R
2R
4R
When the temperature of a copper wire increases, its ability to conduct electricity
remains the same.
increases
decreases
remains the same at first and then increases
A metal wire has a length l and a cross-sectional area A. When a potential difference V is applied to the wire, there is a current I in the wire.
What is the resistivity of the wire?
Which graph shows how the resistance per unit length r of a wire varies with diameter D of the wire?
