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WorksheetsAdditional Worksheet
Total questions: 60
Worksheet time: 1hrs 1mins
What is the SI unit of electric charge?
Volt
Ampere
Coulomb
Ohm
Which particles are responsible for carrying charge in a metallic conductor?
Protons
Neutrons
Electrons
Ions
What happens to the current when the resistance of a circuit doubles, assuming voltage remains constant? (use ohm's law)
Doubles
Halves
Remains the same
Can't be predicted
The formula for current is:
( V x R )
( V / R )
( R / V )
( Q x T )
Which component is used to vary resistance in a circuit?
Thermistor
LDR
Variable resistor
Diode
A positively charged object will attract:
Negative charges
Positive charges
Neutral objects (remember: neutral objects have protons, neutrons, and electrons where number of protons=number of electrons)
Both A and C are correct
Which material is a good conductor of electricity?
Rubber
Copper
Glass
Wood
Ohm's Law is stated as:
( I = V / R )
( R = I / V )
( P = V x I )
( Q = I x t )
The resistance of a wire is directly proportional to its:
Area
Temperature
Length
Material density
The unit of resistance is:
Joule
Ohm
Volt
Coulomb
What is the main purpose of a fuse in a circuit?
To store charge
To protect the circuit from excessive current
To increase voltage
To maintain resistance
If a 6 V battery supplies a current of 3 A, what is the resistance?
2 Ω
18 Ω
0.5 Ω
9 Ω
Which statement is true about series circuits?
Voltage is the same across each component.
Total resistance is the sum of individual resistances.
Current varies across components.
Resistance is always constant.
What device measures electric current?
Voltmeter
Ammeter
Thermistor
Galvanometer
You are doing an experiment to measure the resistance of a wire. The two quantities you must measure to state the equipment you need to make measurements. What is the correct answer below.
Quantity: Voltage - Equipment: Voltmeter , and also Quantity: Current - Equipment: Voltmeter
Quantity: Voltage - Equipment: Voltmeter , and also Quantity: Current - Equipment: Ammeter
Quantity: Voltage - Equipment: Ammeter, and also Quantity: Current - Equipment: Voltmeter
Quantity: Voltage - Equipment: Ammeter, and also Quantity: Current - Equipment: Ammeter
The relationship between power, voltage, and current is:
( P = I x V )
( P = V / R )
( P = I2 / R )
( P = R x Q )
Electron flow from ….. Conventional current flow from ….
positive to negative ; positive to negative
Positive to negative ; negative to positive
Negative to positive; positive to negative
Negative to positive ; negative to positive
The potential difference across a toaster is 120 V. If a charge of 500 C flows through the toaster, what is the work done in Joules?
60
600
720
1,200
If a computer has 10.0A of current and 11Ω of resistance, what is its voltage?
0.9V
1.1V
55V
110V
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
-
A
B
C
D
What unit is used to measure voltage?
Ohms
Omega
Volts
Amps
Which is the right form of Ohm's Law?
V=I/R
V=R/I
I=V/R
I=R/V
What is the current through R1?
10 A
5 A
7 A
2 A
Solve for the total resistance of the circuit shown
50 V
1970 ohms
705 K ohms
20 Amps
Solve for total Current in the circuit shown
25 Amps
35 amps
25 milliamps
35 milliamps
Using the circuit shown solve for total power dissipated in this circuit.
20 watts
30 watts
1.8 Kilowatts
180 watts
The voltage drop across R1 is ______________________________ V.
20
30
40
50
The wattage being dissipated at R2 is _______________ W.
27
12
15
36
__________ remains the same in a series circuit.
Resistance
Voltage
Current
Power
The circuit shown contains three ammeters X, Y and Z.
Which ammeter has the largest reading?
X
Y
Z
They all have the same reading.
The diagram shows two resistors connected in a circuit.
What could be the combined resistance of this arrangement of resistors?
4.0Ω
6.0Ω
9.0Ω
18Ω
The diagram shows a circuit containing three ammeters P, Q and R.
Which statement about the readings on the ammeters is correct?
The reading on P is equal to the reading on Q.
The reading on P is equal to the reading on R.
The reading on Q is greater than the reading on P.
The reading on Q is greater than the reading on R.
A circuit contains a cell of electromotive force (e.m.f.) 2.0V, three resistors, three ammeters and two voltmeters. One ammeter is labelled P and one voltmeter is labelled Q.
The readings on the other two ammeters and on the other voltmeter are shown.
What is the reading on ammeter P and what is the reading on voltmeter Q?
P : 1.5 A
Q : 1.5 V
P : 1.5 A
Q : 2.5 V
P : 2.5 A
Q : 1.5 V
P : 2.5 A
Q : 2.5 V
A 12V battery is connected to a combination of 2.0Ω resistors as shown.
What is the current in the battery?
1.5A
2.0A
4.0A
6.0A
A potential difference of 3 V is applied to a network of resistors. the ammeter reads 0.5A.
What is the current flowing through the 6 Ω resistor?
0.5 A
0.167 A
0.333 A
1.0 A
1. The heating element of a kettle has a potential difference of 230V. If 138kJ of energy is transferred to boil some water, calculate the total amount of charge that flows through the kettle.
Answer (a) (give value without unit)
Three balls P, Q and R are electrically charged. The balls are suspended by threads of insulating
material. The diagram shows the arrangement. Ball P is negatively charged. State the charge on ball Q.
positively charged
negatively charged
neutrally charged
no charge
A plastic ruler is given a positive charge. A sphere hangs from an insulating thread. A student holds the ruler near the sphere, as shown in the diagram. The ruler repels the sphere. State what charge, if any, the sphere carries.
Negative charge.
Neutral charge.
Positive charge.
No charge.
A student rubs a plastic rod with a dry cloth, as shown in the diagram. The rod becomes negatively charged. The student moves the rod close to a suspended, charged rod. The two rods repel each other. Why?
They have the same charge.
They have opposite charges.
They are both made of plastic.
They are both insulators.
The diagram shows a balloon hanging from an insulating thread. A student gives the balloon a positive charge. Which statement explains why the balloon becomes positively charged?
the balloon gains electrons
the balloon loses electrons
the balloon gains protons
the balloon loses protons
