Class 7 Online Courses

Class 7 science Practice Tests


Class 7 Science Online Tests

Electric Motors MCQ Quiz Online PDF Download

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The Book Electric motors Multiple Choice Questions (MCQ Quiz) with answers, electric motors MCQ Quiz PDF download to study online 7th grade science certificate courses. Solve Electrical Circuits and Electric Currents Multiple Choice Questions and Answers (MCQs), Electric Motors quiz answers PDF for online education. The e-Book Electric Motors MCQ App Download: electrical circuits and currents, electric motors, chemical effect of electric current test prep for taking online classes.

The MCQ: To make the coil keep rotating, the current is reversed after every half turn by a device called PDF, "Electric Motors" App Download (Free) with brush, commutator, mutator, and carbon spring choices for online education. Study electrical circuits and electric currents quiz questions, download Amazon eBook (Free Sample) for online school and college.


Class 7 Science MCQs: Electric Motors Quiz Questions PDF Download

MCQ: To make the coil keep rotating, the current is reversed after every half turn by a device called

A) brush
B) commutator
C) mutator
D) carbon spring

MCQ: A magnet may attract or repel by

A) another magnet
B) electric current
C) resistor
D) dynamo

MCQ: Electric motor changes electrical energy into

A) potential energy
B) thermal energy
C) heat energy
D) kinetic energy

MCQ: Many machines we use, are powered by

A) thermal energy
B) sound energy
C) electric motors
D) dynamos

MCQ: The magnetic field of the coil and the permanent magnet

A) attract each other
B) repel each other
C) combine with each other
D) stay with each other

Practice Tests: Class 7 Science Exam Prep

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Class 7 Science Certification Exam Tests
Electric Motors App (Android & iOS)

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Electric Motors MCQs Book Questions

To make the coil keep rotating, the current is reversed after everyAll veins carry deoxygenated blood exceptAs the water evaporates, due to cold air itIf we add an electron to the outermost shell of an atom, the charge turnsAll electric objects we see around us like electric bell, electric motor,Percussion instruments produce notes when they are