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WorksheetsG11 Electricity concepts
Total questions: 36
Worksheet time: 3hrs 47mins
Voltage is also known as
Potential difference
Volts
Amperes
Energy
Resistance is (SAGs definition)
opposite to the flow of charge
opposition to the flow of charge
opposition to the flow of current
opposition to the flow of electrical current
The current in a circuit is related to
The number of electrons which flow through the circuit
The energy each electron gains or loses as it flows through the circuit
Electrons cannot just disappear, this is because of
The law of conservation of mass
The law of conservation of charge
Ghosts don't like to take electrons
Current is the same in a series circuit
In a parallel part of the circuit, the current in the different branches is
The same
Different
Which physical quantity should be the same regardless of which parallel branch you are considering?
Number of electrons passing per second
Number of electrons flowing through that branch
Difference in energy between the start and end point
Difference in energy per electron between the start and end point
Resistance is affected by
(chose all the correct answers)
The colour of the resistor
The material that the resistor is made out of
The shape of the resistor (cylindrical vs rectangular)
The temperature of the resistor in the circuit
Voltmeters should ideally have
high resistance
low resistance
no resistance
Ammeters should ideally have
High resistance
Low resistance
No resistance
A path with no resistance that connects one side of the battery to the other side of the battery is called
Zero resistance branch
Short circuit
Infinite current path
An ammeter measures __________________ and is therefore connected in __________
the number of electrons which pass a point per second; parallel
the number of electrons which pass a point per second; series
the difference in energy (per electron) between two points; parallel
the difference in energy (per electron) between two points; series
A voltmeter measures __________________ and is therefore connected in __________
the number of electrons which pass a point per second; parallel
the number of electrons which pass a point per second; series
the difference in energy (per electron) between two points; parallel
the difference in energy (per electron) between two points; series
Which of the following is the correct formula for CURRENT in a SERIES circuit?
I = I1 + I2
I = I1 = I2
1/I = 1/I1 +1/I2
Which of the following is true for CURRENT in a PARALLEL part of a circuit
I// = I1 + I2
I// = I1 = I2
1/I// = 1/I1 +1/I2
Which of the following is the correct formula for VOLTAGE in a SERIES circuit?
V = V1 + V2
V = V1 = V2
1/V = 1/V1 +1/V2
Which of the following is true for VOLTAGE in a PARALLEL part of a circuit
V// = V1 + V2
V// = V1 = V2
1/V// = 1/V1 +1/V2
Which of the following is the correct formula for RESISTANCE in a SERIES circuit?
R = R1 + R2
R = R1 = R2
1/R = 1/R1 +1/R2
Which of the following is true for RESISTANCE in a PARALLEL part of a circuit
R// = R1 + R2
R// = R1 + R2
1/R// = 1/R1 +1/R2
How does the resistance of metals and semi-metals change as you INCREASE the TEMPERATURE?
Metals increase
Semi-metals increase
Metals increase
Semi-metals decrease
Metals decrease
Semi-metals increase
Metals decrease
Semi-metals decrease
Electron flow (the direction that electrons actually flow) is from
Negative to positive
Positive to negative
Conventional current flow (the direction that current was originally/traditionally/conventionally thought to flow) is from
positive to negative
negative to positive
The DEFINING equation for current is
I = V/R
I = q/t
I = P/V
The DEFINING equation for potential difference is
V = IR
V = W/Q
V = P/I
In electricity equations what do the symbols represent
P - Power
W - Watts
P - Potential difference
W - Watts
P - Power
W - Energy
P - Potential difference
W - Energy
Which scientific terms do we use for a cell (battery) [emf] and a component (such as a resistor) [potential difference] ?
Cell - Energy is supplied
Component - Energy is used
Cell - Energy is supplied
Component - Work is done
Cell - Work is supplied
Component - Energy is used
Cell - Work is supplied
Component - Work is done
The potential difference in a circuit is related to
The number of electrons in the circuit
The energy of each electron
Ohm's law states that
The current through a conductor is directly proportional to the potential difference across the conductor at a constant temperature
The potential difference through a conductor is directly proportional to the current through a conductor at a constant temperature
Q is _______________ measured in ____________
Current; Amps
Current; Coulombs
Charge; Coulombs
Questions; Confusion
How can a factory increase the resistance of a resistor which they are manufacturing?
Select all the correct answers.
increase the length
increase the temperature
increase the thickness
use a material of a higher resistivity
The difference between a battery and a cell is
Batteries can be recharged, cells can't
Two or more batteries make up a cell
Two or more cells make up a battery
Batteries are connected in parallel and cells are connected in series
When asked about which light bulb glows brightest we must consider
resistance
current
voltage
power
A circuit with an open switch is an...
open circuit
closed circuit
LEDs do/do not obey Ohm's law and so are called ______
do; Ohmic conductors
do; non-Ohmic conductors
do not; Ohmic conductors
do not; non-Ohmic conductors
What is the fundamental difference between electrostatics and electricity
Electrostatics - studies charges at rest
Electricity - studies charges that are moving
Electrostatics - considers both protons and electrons
Electricity - only considers electrons
Electrostatics - when charges exert a force on each other
Electricity - when there is no force on the charges.
Which is more dangerous
High voltage
High current
The current in a circuit is related to
The number of electrons which flow through the circuit
The energy each electron gains or loses as it flows through the circuit
