WorksheetsGenerators, Motors, and Transformers
Total questions: 19
Worksheet time: 12mins
Choose all of the generators
Choose all of the motors.
Choose all of the transformers.
How does a motor work?
Current generates an electric field around the loop of wire. The electric force causes the loop of wire to rotate.
Current generates a magnetic field in the loop of wire that is then attracted and repelled by the magnet(s) in the motor.
The magnets in the motor attract and repel the metal in the copper wire that makes up the loop. This causes the loop to rotate.
Motors are devices that convert _____ energy into _____ energy.
chemical; mechanical
mechanical; electrical
electrical; mechanical
potential; kinetic
A transformer actually transforms
voltage
magnetic field lines
generators into motors
What type of current is produced in a battery
induced
magnetic
alternating
direct
What do step-up transformers do to a circuits voltage?
Increase it
Decrease it
No affect on voltage
Drop it to 0
What is the principle behind the operation of an electric generator?
Electromagnetic induction
Photoelectric effect
Thermionic emission
Piezoelectric effect
What is the main function of a capacitor in an AC circuit?
To store charge
To increase voltage
To filter out fluctuations in voltage
To convert AC to DC
Which of the following describes an AC motor?
Powered by direct current
Has only one basic part
Operates by applying alternating current
Requires no magnetic field
What is the purpose of a Van de Graaff generator?
To store mechanical energy
To increase voltage for transmission
To generate high-voltage electricity
To convert AC-DC
According to the Bohr model, which particles orbit the nucleus of an atom?
Protons
Neutrons
Electrons
Nucleons
What does Ohm's Law state?
Voltage is inversely proportional to current
Current is directly proportional to resistance
Current is directly proportional to voltage
Resistance equals voltage divided by current
In terms of electric charge, what does the Law of Conservation of Electric Charge state?
Charge can be created or destroyed
Charge can only be moved from one place to another
Charge can only be stored
Charge can only be transferred through conductors
A _________ circuit has multiple pathways for current to flow
Series Circuit
Open Circuit
Combination Circuit
Parallel Circuit
A circuit has a voltage of 120 volts and a resistance of 30 ohms. Calculate the current flowing through the circuit.
2 Amps
4 Amps
8 Amps
0.25 Amps
If an electrical appliance uses 500 watts of power and operates at a voltage of 220 volts, what is the current drawn by the appliance?
0.5 Amps
2.27 Amps
10 Amps
5 Amps
