WorksheetsElectrotechnics
Total questions: 15
Worksheet time: 8mins
Standard for AC voltage in our region is:
110V with 60Hz
110V with 50 Hz
230V with 60 Hz
230V with 50Hz
An electric generator is an electrical machine that converts _________ energy into _________ energy.
electrical-mechanical
mechanical-electrical
electrical-fluid
electrical-electronic
What is correct order in electricity transmission:
Power plant (1)
Transmission lines (2)
Step down transformer (3)
Step up transformer (4)
Homes (5)
1-4-2-3-5
1-4-3-2-5
4-1-3-2-5
4-1-2-3-5
Electric current is measured in volts (V).
True
False
Thermal power station is a power station in which heat energy is converted to electric power.
True
False
Plastic and dry wood are very good electrical conductors.
True
False
____________ electricity is more efficient and less expensive for long-distance electricity transmission. _____________ electricity is safer for use in homes and businesses.
Higher voltage-Lower voltage
Lower voltage-Higher voltage
AC current-DC current
DC current-AC current
Conventional current flow is from positive to negative terminal.
True
False
If U=7V and I=2A, how much is P?
9W
14N
14W
9N
Oil and natural gas are renewable sources of energy.
True
False
Copper is a very good conductor.
True
False
Hydroelectric power plants have to use dams to produce electricity.
True
False
AC current can be described with
sine function
linear function
quadratic function
exponential function
Dynamo is
a football club
a small generator used on bicycles
a type of bomb.
nothing.
Solar panels produce DC current.
True
False
