Class 7 Science MCQs - Chapter 6
Electrical Circuits and Electric Currents Quiz Questions & Answers PDF Download - 19
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Electrical Circuits and Electric Currents Exam Questions and Answers PDF Download: Test 19
The resistors that have set resistance, are known as
- fixed resistors
- variable resistors
- thermistors
- fixators
If temperature rises very high, it can be used in
- electric lamps
- electric heaters
- electric coolers
- electric fans
The first thing on which the amount of consumed energy depends, is
- amount of ions in a wire
- amount of resistance
- amount of electron's flow
- length of time, the appliance has been used for
An example in which light emitting diodes are used, is
- calculator
- hard drive
- optical drive
- analog watch
Against resistance when electric current is forced through a conductor, electrons collide with the atoms of conductor which make them
- hot
- cold
- vibrate
- tremble
Class 7 Science Mock Tests
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