Class 7 Science Online Tests
Conductors and Insulators MCQ (Multiple Choice Questions) PDF Download
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Conductors and Insulators MCQ (PDF) Questions Answers Download
In conductors, electrons can flow because their
- ions are free
- protons are free
- electrons are free
- negative ions are free
Poor conductor of electricity is
- silver
- aluminum
- water
- copper
Ions are charged particles. They are formed when an atom
- gains electrons
- loses electrons
- gains or loses electrons
- shares electrons
The materials that allow the electrons to flow through them is known as
- insulators
- conductors
- electrolytes
- bases
An example in which light emitting diodes are used, is
- calculator
- hard drive
- optical drive
- analog watch
Class 7 Science Practice Tests
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