Electricity Basics
Ohm's Law
Electric Circuits
Electricity Miscellaneous
100
What does the Law of Electric Forces say?
Opposite charges attract, same charges repel
100
What is the equation for Ohm's Law?
Voltage = Current x Resistance
100
Electrons move through the circuit towards which battery terminal?
The positive
100
When lightning strikes the ground to transfer electrons we call that
Electric Discharge
200
What two things can be done to decrease the force of attraction between two charges?
1. Move the charges further apart
2. Decrease the amount of charge on each charge
200
If a circuit tester is measuring 2 amps and you put a resistor in the circuit that has 0.65 ohms of resistance will you be able to light a 1.5 V lightbulb?
no, it will only have 1.3 volts
200
With 2 batteries and 1 bulb, which circuit would create the brightest bulb?
Series
200
In our comparison to a river flowing, what does the amount of water being stored behind a dam and the force with which it can move compared to in our electrical circuits?
The Voltage
300
What do we call the charge area surrounding a charged particle?
an electric field
300
If a Voltmeter measures a drop in voltage from 1.5 V to 1 V, but the current remains at 2 amps, what is the resistance of the circuit that caused it to drop to 1 V?
0.5 Ohms
300
With 2 light bulbs and 1 battery, what type of circuit would produce the brightest bulb?
Parallel
300
A short, fat wire would have low or high resistance?
Low
400
When charges build up on an object temporarily it is called
static buildup (electricity)
400
If you keep the voltage the same, but decrease the resistance, what will happen to the current?
It will go up
400
Which diagram or diagrams best represent objects in both series and parallel?
3 and 4
400
Electrical energy is formed in a generator from this kind of energy
mechanical
500
If I move an negative object towards, but don't touch, a neutral object, and the neutral object then becomes positive charged. What do we call this when this happens?
Induction
500
If I want to decrease the current flowing in a circuit, what are 2 ways I can do that according to Ohm's Law?
increase the resistance or decrease the voltage
500
If R1 goes out will R2 also?
Yes
500
What key things are needed to generate electricity in a generator?
A wire spinning inside a magnet