Practice Electric Current (8.2) - Electricity and Magnetism

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is electric current measured in?
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Think of the standard unit for current.
Question 2.
What does 'Q' represent in the formula I = Q/t?
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Consider what electric charge is measured in.
3Question 3.
What is the unit of electric current?
- Volts
- Amperes
- Ohms
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Think about which unit relates to the flow of electric charge.
4Question 4.
True or False: Electric current flows from negative to positive.
- True
- False
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Remember the definition of conventional current.
Question 5.
In a circuit, if 30 Coulombs of charge flow over 10 seconds, calculate the current. Then determine how many Coulombs would flow in 60 seconds at this constant current.
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Use I = Q/t to find the current, then multiply by time to find charge.
Question 6.
You have a circuit running at 5 Amperes. If the current is halved, what will be the new current and how would this affect the overall system performance?
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Consider how current relates to power and current consumption in appliances.

5 more questions in this section. Enroll free to practise them all.