Class 7 Science e-Book's MCQs - Complete
Electric Motors App Quiz & e-Book Download - 10
Apps:
MCQ:
To make the coil keep rotating, the current is reversed after every half turn by a device called
- brush
- commutator
- mutator
- carbon spring
b
Class 7 Science App & e-Book Tests PDF Download
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7th Grade Science MCQs eBook Download
8th Grade Science Test Questions
- Reflection of Light Quiz: Reflection obtained from a smooth surface is called a
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Class 7 Science Quiz with Answers
- Telescopes App's Quiz: In a reflecting telescope, a large concave mirror bounces all
- Food Chains and Food Webs App's MCQ: Other link in a food chain besides producer is known
- Ionic Bonds App's MCQ: Attraction of two ions due to opposite charge is known
- Electrical Circuits and Currents App's MCQs: Charge flowing in wire when we turn light on, is
- Fuses and Circuit Breakers App's MCQs: Miniature circuit breaker is a small