Download QUESTIONS lesson 4 - JUANA

Ohm's law
QUESTIONS
1. What does Ohm's law tell us?
The amperage of a current circulating through a closed circuit is directly
proportional to the voltage being applied, and inversely proportional to
the circuit´s electrical resistance
2. If the voltage applied to a circuit is increased, what will happen
to the amperage of the electric current circulating? What if the
voltage is decreased?
The amperage will increased too. If the voltage is decreased, the
amperage will decreased
3. If the resistance in a circuit is decreased, what will happen to the
amperage of the electric current circulating? What if the
resistance is increased?
If the resistance of the circuit is decreased, the amperage will increased.
And if the resistance of the circuit is increased the amperage will
decreased
4. What happens if a circuit has no resistance? And what if it has
infinite resistance?
If the circuit has no resistance it can produce a short circuit. In other
words , the amount of electrons flowing is so high that the circuit can be
burned out. ( in the case where the generator is a battery it will run down
very quickly)
If it has infinite resistance, the electrons cannot flow through it.
5. What is the mathematical expression for Ohm's law?
I= V / R
6. There are three physical magnitudes used in the equation for
Ohm's law: amperage of the current, voltage, and resistance.
What units from the international system are used to measure
these?
Amperage is measured in amperes (A) , Voltage is measured in volts (V)
and resistance is measured in ohmios (Ω)
7. Use an Internet search to find a definition for the three
magnitudes listed in the previous question.
The electrical resistance of an electrical conductor is a measure of the
difficulty to pass an electric current through that conductor
Voltage, electric potential difference, electric pressure or electric is the
difference in electric potential energy between two points per unit electric
charge.
The strength of an electric current measured in amperes.