Physics quiz

What is Ohm’s law?

1.     What is the voltage of a circuit with 15 amps of current and toaster with 8 ohms of resistance?

2.      A light bulb has a resistance of 4 ohms and a current of 2 A. What is the voltage across the bulb?

3.     How much voltage would be necessary to generate 10 amps of current in a circuit that has 5 ohms of resistance?

4.     What is a series circuit?

5.     Define parallel circuit?

6.     Calculate the total resistance of a circuit containing each of the following combinations of resistors.

a. Two 8 Ω resistors in parallel

b. Two 12 Ω resistors in parallel

c. A 4 Ω resistor and an 8 Ω resistor in parallel

d. A 12 Ω resistor and a 3 Ω resistor in parallel

7.     Electrical power

Your oven has a power rating of 5000 watts.

a. How many kilowatts is this?

b. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used?

c. If your town charges $0.15/kWh, what is the cost to use the oven to bake the cookies?

8. Coulomb’s Law

a. What is the force between a 3 C charge and a 2 C charge separated by a distance of 5 meters?

b. Calculate the force between a 0.006 C charge and a 0.001 C charge 4 meters apart.

c. Calculate the force between a 0.05 C charge and a 0.03 C charge 2 meters apart.