WorksheetsBasic Electricity
Total questions: 18
Worksheet time: 9mins
The following components are control devices:
a) One-way switch, cell, two-way switch
b) One-way switch, two-way switch, push switch
c) Two-way switch, push switch, wire
d) One-way switch, push switch, motor
Electric current is...
a) The flow of protons from one atom to another
b) The flow of electrons inside an insulating material
c) The flow of electrons inside a conductive material
d) The flow of protons from one atom to another inside a conductive material
Select the option that states Ohm’s law correctly:
a) V = I × R
b) V = I / R
c) I = V × R
d) R = V × I
The following materials are conductors of electricity:
a) Copper, plastic, aluminium, wood, cork
b) Copper, aluminium, water, iron
c) Aluminium, silver, cork, paper
d) Paper, water, copper, iron
What current flows through the following circuit?
a) 10 mA
b) 1 mA
c) 1 A
d) 100 mA
This symbol represents:
a) One-way switch
b) Buzzer
c) NO push switch
Push switch
Electrical energy:
is the most common form of energy because it is easy to obtain and can be transported over long distances.
is not the most common form of energy because it is not easy to obtain but can be transported over long distances.
can easily be transformed into other forms of energy but cannot be transported over long distances.
is not the most common form of energy but can easily be transformed into many other forms of energy
There are four main components in a electric circuit:
cells, batteries, resistors and motors
power sources, load devices, conductors and control devices
lamps, switches, resistors and conductors
conductors, resistors, power sources and wires
The attached symbol represents:
A resistor
A lamp
A motor
A short coircuit
The control devices:
allow or prevent the flow of the electric current through the circuit
receive the electrical energy and convert it in other types of useful energy
Increase o reduce the voltage of a circuit between two points
Change the direction of the flow of the electric current
Power sources:
supply the electrical energy in order to move the electrons
collect and keep the electrical energy from the circuit
change the flowing sense of the electric current
create a difference of voltage in the contro ldevices of a circuit
The main variables in a circuit are:
Voltage, Current and Resistance
Power, Voltage and Control
Current, Control and Potential
Resistance, Control and Voltage
The attached figure is the symbol of:
Ohms, unit of resistance
Ohms, units of current intensity
Volts, units of voltage
Amps, units of intensity
In the attached circuit, the equivalent resistance is:
4 ohms
3 ohms
2 ohms
6 ohms
In the attached circuit the value of the intensity of the current is;
1 Amp
2 Amps
3 Amps
4 Amps
In the attached circuit, the equivalent resistance is:
250 ohms
150 ohms
50 ohms
225 ohms
In the attached circuit, the value of the current is:
2,5 v.
250 ohms
10 amps
0,01 amps
The attached figure is the symbol of:
A lamp
A motor
A two ways switch
A buzzer
