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Electrical Concepts Warmup Questions

A series of warmup questions related to electrostatic force, electric field lines, electricity, circuit components, and Ohm's Law.

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Electrical Concepts Warmup Questions

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  1. Warmup February 21, 2017 • What is the equation to determine electrostatic force (this is in your notes)? • What happens if you double the charge q1? • What if you double the distance r?

  2. Warmup February 22, 2017 • Sketch electric field lines for a positive point charge. Which direction do the lines point? • Sketch electric field lines for a negative point charge. Which direction do the lines point?

  3. Warmup February 24, 2017 • If electrostatic force is negative, what does that mean? • If distance triples, what happens to force? • If an object becomes positively charged by friction, does that mean that protons were added? Why or why not?

  4. Warmup February 27, 2017 • What is electricity (the kind that flows through your house)? • What does “magnitude” mean?

  5. Warmup March 2, 2017 PLEASE DO NOT TOUCH THE EQUIPMENT UNTIL INSTRUCTED TO DO SO. • Which of the following is most responsible for the brightness of a lightbulb? • Current • Energy • Voltage • In a series circuit, ______ is the same across all components • Voltage • Resistance • Current

  6. Warmup March 3, 2017 • In a parallel circuit, total resistance is calculated by… • Adding up the component resistors • Taking the reciprocal of the sum of reciprocals • Magic • In a parallel circuit, ______ is the same across all components • Voltage • Resistance • Current

  7. Warmup March 6, 2017 • What happens to current in a circuit if the resistance of the circuit is decreased but voltage remains the same? • The current flowing in a circuit has been doubled. Assuming that the resistance remains the same, what happens to the voltage in the circuit according to Ohm’s Law?

  8. Warmup March 7, 2017 • What is the power rating of a light bulb if it’s used in a circuit with 110 V and 20 A current? The resistance of the circuit is 10 Ω. • Among the choices given below, pick the one that correctly matches up units: A. Amperes = Volts x Ohms B. Volts = Amperes x Ohms C. Volts = Amperes ÷ Ohms D. Amperes = Ohms ÷ Volts

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