NON-CONTACT FORCES UNIT TEST
Question: Which statement about electric charges is correct?
Answer: An object with a negative charge and an object with a positive charge will attract each other
Question: A group of students sets up an electric circuit with wires, a battery, and a light bulb. Why is their circuit called a direct circuit?
Answer: The flow of electrons travels in one direction
Question: Sally puts on wool socks and rubs her feet on a nylon carpet. How does static electricity build up in sally?
Answer: Electrons from the wool socks move into the carpet, giving Sally and her socks a positive charge.
Question: The resistance in a circuit is halved. What happens to the voltage? V = IR
Answer: The voltage is halved.
Question: How does a flashlight illustrate the Law of Conservation of Energy?
Answer: Potential chemical energy in the battery is converted to electrical energy, which is converted to light energy and heat energy.
Question: Which is an example of a load in an electric circuit?
Answer: speaker
Question: Which of the following best describes an electric circuit that powers a load?
Answer: Electric current flows from an energy source through a conductor to a load and back to the energy source.
Question: Hal makes an electromagnet with a 9-volt battery, wire, and a steel rod. What is the function of electric current in his electromagnet?
Answer: Electric current creates a magnetic field that charges the rod.
Question: What is the function of the core of an electromagnet?
Answer: The core is the part that becomes magnetized.
10-14 are written answers, you'll need to do those yourself. Sorry lol. Goodluck.
Date posted - 2/20/24