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WorksheetsSCIENCE 10-EVALUATION
Total questions: 10
Worksheet time: 5mins
A device that converts mechanical energy into electrical energy.
motor
rotor
generator
detector
A device that converts electrical energy into mechanical energy.
motor
rotor
generator
detector
Washing machines, ceiling fans and electric drills are just some of the many examples of this device.
rotor
motor
generator
detector
What transformation can take place in an improvised generator?
mechanical energy into electrical energy
electrical energy into mechanical energy
alternating current into direct current
direct current into alternating current
The refrigerator has become in demand in this time of pandemic because people tend to stock food and stay at home as number one precautionary measure to protect themselves against Covid-19. What do you call the device that converts electrical energy into mechanical energy to make these appliances work?
Electric motor
Electric generator
Electric current
Electric device
What part of an electric motor includes the rotating magnets (or aluminum bars), the shaft, and any object which moves when the motor is working?
Armature
Field magnet
Commutator
Rotor
The working principle of an electric motor is based on a fact that a current carrying conductor produces a magnetic field around it. Which of the following describes an electric motor?
An electric motor is used to convert mechanical energy into electrical energy
An electric motor is used to convert electrical energy into mechanical energy.
Electric motor takes resistance & current and transforms it into force and velocity.
Electric motor takes resistance & voltage and transforms it into force and velocity.
According to Faraday's law, the induced voltage is proportional to ________________.
the product of its number of loops
the rate at which the magnetic field changes within loops
both of these
none of these
The greater the amount of loops you have ____________________________.
the less voltage
the greater the voltage
the voltage stays the same
there is no change
Which of the following is NOT an application of electromagnetic induction?
Generating electricity
Energy efficient motors
Energy efficient cookers and burners
Using a magnet to separate scrap metal parts
