Resistance (Junior Cert Wood Technology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the primary function of resistance in an electric circuit?
What is the primary function of resistance in an electric circuit?
Controls current by limiting energy
What does resistance turn electrical energy into?
What does resistance turn electrical energy into?
Heat
Which instrument is used to measure resistance in a circuit?
Which instrument is used to measure resistance in a circuit?
Multimeter
What safety step must be taken before measuring resistance?
What safety step must be taken before measuring resistance?
Switch off power
What is the unit of measurement for resistance?
What is the unit of measurement for resistance?
Ohms (Ω)
Which material has low resistance?
Which material has low resistance?
Copper
How does temperature affect resistance in conductors?
How does temperature affect resistance in conductors?
Heat increases resistance
How does cross-sectional area affect resistance?
How does cross-sectional area affect resistance?
Larger areas lower resistance
What is a key characteristic of fixed resistors?
What is a key characteristic of fixed resistors?
Have specific values for stable designs
What are variable resistors commonly used for?
What are variable resistors commonly used for?
Volume control
What is a key function of resistors in circuits?
What is a key function of resistors in circuits?
Limit current to prevent damage
Where should a resistor be placed to control current to safe levels?
Where should a resistor be placed to control current to safe levels?
In series with supply and load