SNC1P1 Exam Review #3 - Electricity

Atoms contain charged particles called:

• Protons, neutrons and electrons
• Protons and electrons
• Protons and neutrons
• Electrons and neutrons 

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The negatively charged particles in an atom are called _____.

• electrons
• neutrons
• negatrons
• protons

Two like charges:

•  neutralize each other.
• repel each other. 
• must be neutrons. 
• attract each other.

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If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

When objects have equal numbers of positive and negative charges, they are

• positively charged
• negatively charged
• electrically neutral
• unbalanced

If a negatively charged rod touches a conductor, the conductor will be charged by what method? 

• Friction
• Conduction
• Induction
• Convection

An object becomes negatively charged by

• losing protons
• gaining electrons
• losing electrons
• gaining protons

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An object becomes positively charged by

• losing protons
• gaining electrons
• losing electrons
• gaining protons

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Charging by friction requires rubbing. Charging by contact requires ...

• rubbing
• touching
• no contact

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.
• the silk has become negatively charged.
• protons have moved to the rod.
• glass attracts more protons.

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NGSS.HS-PS2-4

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