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WorksheetsTest electric circuits 3º ESO
Total questions: 36
Worksheet time: 55mins
Electric current is the ___________ of _____________ in a _____________ material.
movement, protons, conductor.
flow, electrons, conductor.
movement, neutrons, conductor.
These symbols represent...
A generator.
A fuse.
A resistance.
An electric shock.
If we close the switch and the buzzer breaks, which receivers work?
The buzzer.
None.
The bulb and the motor.
If we close the switch, which bulbs are on if the bulb L3 fuses?
None because there is no current in the circuit.
L1, L2 and L4
Only L4
The current intensity in the circuit is...
180 A
2.22 A
0.45 A
The voltage of the battery is...
6 V
9 V
4.5 V
The resistance of the bulb is...
45 Ω
550 Ω
88 Ω
How much does it cost to keep a 800 W water heater working for 12 hours if the energy cost is 0.15 € per KWh?
1.44 €
64 €
0.84 €
Which is the total current in the circuit? And the current through the bulb 2? (supposing the switch is close)
Itotal = 3A ; I2 = 1A
Itotal = 3A ; I2 = 0.5A
Itotal = 1.5A ; I2 = 1A
The power (in KW) of an electric drill that works with 230 V and 6 A is...
1.38 kW
1380 kW
38.3 kW
According to the Ohm's law, if the resistance in a circuit is reduced to half, the current...
remains constant.
will reduce to half too.
will double.
Opposition offered by any material to be crossed by an electric current
Resistance, we measure it in volts.
Current intensity, we measure it in amps.
Resistance, we measure it in ohms.
Power, we measure it in watts.
Which graphic represents alternating current?
The Ohm's Law is...
I=V*R
R=V*I
V=R*I
In a circuit with CONNECTIONS IN SERIES ... (two options are correct)
All receivers work with the same voltage
The battery voltage is distributed among all the receivers.
If one of the elements stops working, the rest work normally.
The current intensity through each receiver is the same for all the receivers.
In this circuit, the current intensity is...
162 A
1 A
5 A
0,5 A
In this circuit, the voltage in the receiver 2 is...
5 V
2.5 V
0.55 V
In a circuit with CONNECTIONS IN PARALLEL ... (two options are correct)
The current intensity in the circuit is always the same.
If one of the elements stops working, the rest work normally.
The current generated by the battery is distributed among all the receivers.
The total resistance is equal to the sum of the individual resistances.
If R1= 10 Ω and R2= 15 Ω, the total resistance in this circuit is...
6 Ω
25 Ω
150 Ω
If R1= 10Ω, R2= 15Ω and V= 6V, the total current in the circuit (I) is...
2,5 A
1 A
0,25 A
The components of any circuit can be classified into:
Receivers, cables and generators.
Receivers, generators and conductors.
Receivers, conductors, generators, control elements and protection elements.
Receivers, switches and generators.
The number of electrons through a conductor per unit time is the...
Ohm's law.
current intensity.
voltage.
power.
This symbol represents a switch.
Instrument that we use to measure the current intensity through a wire in a circuit.
Ammeter.
Ohmmeter.
Voltmeter.
The electric current that uses a washing machine, a fridge or a TV is...
Direct current.
Alternating current.
None of them.
The diagram represents a(n)...
Open circuit.
Closed circuit.
Shortcircuit.
Types of electric current.
Positive and negative.
Direct current and alternating current.
High voltage and low voltage.
How are these bulbs connected?
In parallel.
In series.
In series and parallel (mixed)
Electric motors, bulbs, buzzers and resistors are examples of...
control elements.
conductors.
receivers.
generators.
The components that provide the energy to the electrons are...
the receivers.
the generators.
the conductors.
the control elements.
In this circuit, the voltage in the bulb when we close the switch is...
9V
4,5V
4,5 A
The effects of the electric current
Light, heat, movement, sound, magnetism...
Light and heat.
Only light.
This symbol represents...
A buzzer.
A SPST switch.
A limit switch.
A SPDT switch.
This formula...
represents the relation between the three basic electric magnitudes.
represents the Ohm's Law.
can also be expressed as V = I x R
All the options are correct.
Which symbol represents a pushbutton?
How do we connect batteries to get higher voltage?
A. In series.
B. In parallel
