Definitions (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the formula for capacitance ?
What is the formula for capacitance ?
What does back do in a motor?
What does back do in a motor?
Opposes the supplied potential difference
To what percentage of initial charge does a capacitor discharge in one time constant?
To what percentage of initial charge does a capacitor discharge in one time constant?
37%
What is magnetic flux density defined as?
What is magnetic flux density defined as?
Force per unit current per unit length
What is the orbital period of a geostationary satellite?
What is the orbital period of a geostationary satellite?
24 hours
What does Lenz's Law state about induced current direction?
What does Lenz's Law state about induced current direction?
It opposes the change that caused it
What is the function of a dielectric in a capacitor?
What is the function of a dielectric in a capacitor?
Increases capacitance
What is the formula for electric field strength ?
What is the formula for electric field strength ?
What characterises a step-down transformer?
What characterises a step-down transformer?
Fewer turns on secondary coil
What describes a uniform field?
What describes a uniform field?
Parallel and equally spaced field lines