Regents Physic Chapter 20-22 Reading Guide
20.1 Schematic diagrams and circuits – due Wed. 3/5
1.
2.
3.
4.
What is a schematic diagram?
What is an electric circuit?
What is a short circuit?
What is emf?
20.2 Resistors in series or in parallel – due Thu. 3/6
1. What does it mean to say resistors in series? Draw a schematic diagram to show your
understanding.
2. Describe the current, voltage and equivalent resistance in a series circuit.
3. What happens to a series circuit when a single bulb burns out?
4. What does it mean to say resistors in parallel? Draw a schematic diagram to show your
understanding.
5. Describe the current, voltage and equivalent resistance in a parallel circuit.
6. How can you tell that the headlight on a car is wired in parallel or in series?
7. Sketch as many as you can using three light bulbs, each of which has the same resistance and a
battery.
21.1 Magnets and magnetic fields – due Tue. 3/11
1.
2.
3.
4.
What is magnetic field?
What is the direction of magnetic field?
When you break a magnet in half, how many poles does each piece have?
What are hard and soft magnetic materials? Give an example of each.
21.2 Electromagnetism and magnetic domain – due Tue 3/11
1.
2.
3.
4.
What is the shape of the magnetic field produced by a straight current-carrying wire?
What is a solenoid?
Why is the magnetic field inside a solenoid stronger than the magnetic field outside?
If electrons behave like magnets, then why aren’t all atoms magnets?
22.1 Induced current – due Tue 3/11
1.
2.
3.
4.
What is electromagnetic induction?
How does magnetic force induce an emf?
What is the condition for an emf to be induced in a circuit?
A circular current loop made of flexible wire is located in a magnetic field. Describe ways an emf
can be induced in the loop.
5. A spacecraft orbiting Earth has a coil of wire in it. An astronaut measures a small current in the
coil, even though there is no battery connects to it and there are no magnets on the space craft.
What is causing this current?
Project: choose one of the following
build a simple motor – due Fri 3/14
build a series or a parallel circuit with mini light bulbs switch(es)
Unit Exam Tuesday 3/14