Shared set · @recuseemail · Electrical Engineering
Introduction and Overview; Circuit Terminology and Concepts
Define basic circuit quantities (voltage, current, resistance) and describe the scope of electrical engineering analysis.
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15 questions with worked explanations. Or make your own from your notes — the first draft needs no account.
What is in it
- What is the fundamental SI unit of electric charge, and what is its symbol?Answer: Coulomb (C); symbol Q
- Define electric current in terms of charge, and give its SI unit.Answer: Current is the rate of flow of charge: i = dq/dt, measured in amperes (A)
- A wire carries a constant current of 3 A. How much charge passes through it in 10 seconds?Answer: 30 coulombs
- Define voltage in terms of energy and charge, and give its SI unit.Answer: Voltage is energy per unit charge: v = dw/dq, measured in volts (V)
- State Ohm's Law and identify what each symbol represents.Answer: v = iR, where v is voltage (V), i is current (A), and R is resistance (Ω)
- A resistor has 12 V across it and 4 A flowing through it. What is its resistance?Answer: 3 ohms
- What is electric power, and what SI unit is it measured in?Answer: Power is the rate of energy transfer, p = vi, measured in watts (W)
- Under the passive sign convention, if current enters the positive terminal of an element and p = vi comes out positive, what does that mean?Answer: The element is absorbing power
- A 9 V battery delivers a current of 2 A to a circuit for 5 seconds. How much energy is delivered?Answer: 90 joules
- What distinguishes an independent source from a dependent source in a circuit?Answer: An independent source's value is fixed or set externally, while a dependent source's value depends on some other…
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