Electric Circuits (Grade 11 NSC Matric Physical Sciences): Quizzes

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Ohm's Law
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What is the unit of measurement for resistance?

Ohms (Ω\Omega)

What does electric current measure in a circuit?

Rate at which charge flows

According to Ohm's Law, current is directly proportional to voltage when what is constant?

Temperature

Which equation correctly rearranges I=VRI = \frac{V}{R} to find voltage?

V=IRV = IR

What shape is the current-voltage graph for an ohmic conductor?

Straight line through origin

On an I-V graph, what does a steeper gradient indicate?

Smaller resistance

How should an ammeter be connected in a circuit?

In series

Which of these is a non-ohmic conductor?

Light bulb

A resistor of 5Ω5\Omega carries a current of 2A2A. What is the voltage across it?

10V10V

Why does Ohm's Law only apply at constant temperature?

Temperature affects resistance

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