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WorksheetsStatic Electricity and Resistance OZ 9B
Total questions: 24
Worksheet time: 48mins
Which two changes to a metal wire both increase resistance?
A Decreasing its length and increasing its temperature.
B Increasing its length and decreasing its temperature
C Decreasing its thickness and increasing its temperature.
D Increasing its thickness and decreasing its temperature.
A metal wire of length 100cm and a cross-sectional area of 0.20 mm2 has a resistance of 8.0 ohms. What is the resistance of a wire of the same metal of length 50 cm and cross-sectional area of 0.40mm2?
A 2.0 Ohms
B 8.0 Ohms
C 16 Ohms
D 32 Ohms
Two wires X and Y are made from the same metal and have the same resistance. Which row identifies a possible pair of values for X and Y?
A
B
C
D
Which diagram shows the current-voltage (I-V) characteristic for a filament lamp?
A
B
C
D
1. A metal sphere is charged by induction. There are four stages W, X, Y, Z in this process. In which order are they carried out?
A W then X then Y then Z
B W then X then Z then Y
C Z then W then X then Y
D X then Z then W then Y
The diagrams represent four copper wires.
Which wire has the greatest resistance?
A
B
C
D
A student used a length of wire as a resistor. He discovers that the resistance of the wire is too small. To be certain of making a resistor of higher value, he should use a piece of wire that is
A Longer and Thicker
B Longer and Thinner
C Shorter and Thicker
D Shorter and thinner
When the thermistor in the circuit below is heated, the current in the lamp increases. Why does this happen?
A The resistance of the lamp decreases.
B The resistance of the lamp increases.
C The resistance of the thermistor decreases.
D The resistance of the thermistor increases.
The diagram shows a circuit used to find the resistance of lamp L. Blocks P, Q, and R represent the different components used. Which is a correct possible choice of components to use for P, Q, and R.
P Ammeter Q Variable resistor R Voltmeter
P Variable resistor Q Voltmeter R Ammeter
P Voltmeter Q Ammeter R Variable Resistor
P Voltmeter Q Variable resistor R Ammeter
Which circuit should be used to find the resistance of a lamp?
A
B
C
D
The table shows the voltage and current ratings for four electric heaters. Which heater has the least resistance?
A
B
C
D
A students wants to find the resistance of resistor R using a voltmeter and an ammeter. Which circuit should the student use?
A
B
C
D
A 3 ohm lamp and a 6 ohm lamp are connected in series. What is the total resistance of the combination?
2
4
9
18
What is static electricity?
Electricity that flows in one direction
Repulsion and attraction between two objects
Charging of an object
E.M.F of the battery
Which of these let charge pass through?
Germanium
Perspex
Human Body
Both A and C
What is the electric field between two positively and negatively charged rods.
Positive to negative
Negative to neutral
No electric field
None of these
A student rubs a plastic rod with a cloth. The rod becomes positively charged. What has happened to the rod?
It has gained electrons
It has gained protons
It has lost electrons
It has lost protons
A polythene rod is rubbed with a cloth. The rod becomes positively charged because of the movement of charged particles. Which row gives the name of these charged particles, and the direction in which they move?
A
B
C
D
A negatively charged rod is held close to one side of a metal sphere. The other side of the sphere is earthed. Which diagram shows the distribution of charge on the metal sphere?
A
B
C
D
Three charged balls P, Q and R are suspended by insulating threads. Ball P is negatively charged. What are the charges on ball Q and on ball R?
A
B
C
D
Two soft iron rods are placed end to end inside a coil which is connected to a battery. The connections from the battery to the coil are now reversed. What happens to the soft iron rods in each case.
A
B
C
D
A plastic rod and a dry cloth are unchanged. The rod becomes negatively charged because the charged particles move from the cloth to the rod. What is the charge on the cloth and which particles moved in the charging process.
A
B
C
D
The table describes two different resistance wires. They are all made from the same metal. Which wire has the smallest resistance.
A
B
C
D
When a plastic comb is placed next to a small piece of aluminium foil hanging from a nylon thread, the foil is repelled by the comb. Why is this?
The comb is charged and the foil is uncharged
The comb is uncharged and the foil is charged
The comb and the foil have charge of opposite signs
The comb and the foil have charge of the same sign
