Question

Question 15 (3 points)

Answer 1

Answer:

15. Current increases

16. 4 Amp

17. Current decreases

18. A direct relationship

19. voltage affects current

20. Current is unchanged

Explanation:

First you need to know about Ohm's Law. Ohm's law can be summarized in the formula:

$I = \dfrac{V}{R}$

where:

V = Voltage

I = Current

R = Resistance

As you can see, when you increase the voltage, the current increases as well. When you decrease the resistance, current increases as well. This means that voltage has a direct relationship with current, and current has an indirect relationship with resistance.

Voltage is the potential, or electrical potential energy that pushes the current along a circuit. THe current is the flow of energy, so it is actually the rate of electrical energy that goes through a point in a circuit over a period of time. The resistance is the resistive force, that the current goes through as it goes through a circuit.

Let's apply that to question 16:

$I=\dfrac{V}{R}$

Our given:

V = 6V

R = 1.5Ω

$I=\dfrac{6V}{1.5\Omega}=4A$

In question 17,just to show you, we can solve it and compare:

6 V battery and 3Ω resistance:

$I=\dfrac{6V}{3\Omega}=2A$

3 V battery and 3Ω resistance:

$I=\dfrac{3V}{3\Omega}=1A$

Current decreases from 2A to 1A.

Let's try it on Question 20:

12V and 5Ω

$I=\dfrac{12V}{5\Omega}=2.4A$

6V and 2.5Ω

$I=\dfrac{6V}{2.5\Omega}=2.4A$

There is no difference.