Heating Effect of an Electric Current (Leaving Cert Physics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
Why does heat energy form when current flows through a conductor with resistance?
Why does heat energy form when current flows through a conductor with resistance?
Electrons collide with atoms
Which formula correctly shows heat energy produced by current in a resistor?
Which formula correctly shows heat energy produced by current in a resistor?
If current doubles whilst resistance and time stay constant, what happens to heat energy?
If current doubles whilst resistance and time stay constant, what happens to heat energy?
Increases four times
If resistance doubles whilst current and time stay constant, what happens to heat energy?
If resistance doubles whilst current and time stay constant, what happens to heat energy?
Doubles
Which formula gives power in terms of voltage and current?
Which formula gives power in terms of voltage and current?
What does power represent in an electrical circuit?
What does power represent in an electrical circuit?
Rate of energy conversion
What characterizes an ohmic conductor?
What characterizes an ohmic conductor?
Constant resistance
How does a filament bulb's resistance change as it heats up?
How does a filament bulb's resistance change as it heats up?
Increases
How does temperature affect resistance in most metals?
How does temperature affect resistance in most metals?
Resistance increases
How does temperature affect resistance in thermistors?
How does temperature affect resistance in thermistors?
Resistance decreases
What shape is the I-V graph for an ohmic conductor?
What shape is the I-V graph for an ohmic conductor?
Straight line through origin