Physics Chapter: Electricity and Circuits
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Questions and Answers

What happens to the hair when it is combed?

  • It gains electrons and becomes negatively charged.
  • It gains protons and becomes positively charged.
  • It loses electrons and becomes positively charged. (correct)
  • It retains its charge without any change.

Which of the following materials is categorized as a strong conductor of electricity?

  • Glass
  • Plastic
  • Cotton (correct)
  • Copper

According to the law of electric charges, what occurs between two like charges?

  • They remain unaffected.
  • They repel each other. (correct)
  • They attract each other.
  • They neutralize each other.

What is true about insulators in the context of electricity?

<p>They restrict the movement of electrons. (C)</p> Signup and view all the answers

What is a characteristic of electrically charged objects attracting neutral objects?

<p>Attraction occurs due to opposite charges. (C)</p> Signup and view all the answers

What unit is used to measure electrical current?

<p>Amperes (C)</p> Signup and view all the answers

What type of cell can be recharged?

<p>Secondary cell (D)</p> Signup and view all the answers

In a series circuit, how does the total current behave?

<p>It is the same at every point in the circuit. (D)</p> Signup and view all the answers

What measures potential difference in a circuit?

<p>Voltmeter (B)</p> Signup and view all the answers

How is total resistance calculated in a parallel circuit?

<p>1/R = 1/R₁ + 1/R₂ + 1/R₃ (A)</p> Signup and view all the answers

Flashcards

Electric Charge

A fundamental property of matter that results from the interaction of charged particles like electrons and protons.

Electron Transfer

The movement of electrons from one object to another, leading to a change in electric charge.

Electrostatic Series

A list of materials ranked by their tendency to gain or lose electrons, determining how they interact electrically.

Conductor

A material that allows electrons to flow easily through it.

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Insulator

A material that resists the flow of electrons.

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Amperes (A)

The unit of measurement for electric current. It represents the amount of electrical charge passing a point in a circuit per unit of time.

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Volts (V)

The unit of measurement for potential difference, which is the electrical pressure that drives the flow of electrons in a circuit.

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What does an ammeter measure?

An ammeter measures the electric current flowing through a circuit.

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What is a potential difference?

A potential difference is the difference in electrical potential between two points in a circuit. It's what drives the flow of electrons.

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What's a Series Circuit?

A series circuit is a circuit where all components are connected in a single loop. The current flows through each component in turn.

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