Physics, 21.02.2020 05:06 adrianVocke3705

A 9V battery is directly connected to each of 3 LED bulbs. Select the statement that accurately describes this circuit.

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Answer from: caliharris123

B) A direct current is flowing through the bulbs using a parallel circuit so each bulb has the same voltage.

Explanation:

This question comes with four answer choices to select one that is true.

A) A direct current is flowing through the bulbs using a series circuit so each bulb has the same current. B) A direct current is flowing through the bulbs using a parallel circuit so each bulb has the same voltage. C) An alternating current is flowing through the bulbs using a parallel circuit so each bulb has the same current. D) An alternating current is flowing through the bulbs using a series circuit so each bulb has the same voltage. Solution

1. The batteries produce direct current, in contrast to the alternating current that you find in the outlets of your house.

Thus, a direct current is flowing through the circuit.

2. The series circuit connect the parts (bulbs in this case) one after another, only the first and last bulbs will be in contact with the battery.

The parallel circuits connect the parts (bulbs) directly to the battery.

Thus, this is a parallel circuit.

3, In the parallel circuit the voltage is the same for all the parts but the current is distributed among the parts. The total current will be the sum of the current throughout each bulb. Thus, since this is a parallel circuit each bulb has the same voltage.

Hence, you conclude that the statement that accurately describe this circuit is

B) A direct current is flowing through the bulbs using a parallel circuit so each bulb has the same voltage.

Answer from: Quest

Answerthe force between the charges will be f/9 (one-ninth of force f)explanationcoulomb's law relates the magnitudes two point charges q₁ and q₂, the distance, r, between the charges, and the electrostatic force, f, between the two charges: $f = \dfrac{k q_1 q_2}{r^2}$ k represents coulomb's constant, k = 8.99×10⁹ n·m²/c².note that if we have r = 3r, then $\begin{aligned} f & = \dfrac{k q_1 q_2}{r^2} \\ f_{3r} & = \dfrac{k q_1 q_2}{(3r)^2} \\ & = \dfrac{k q_1 q_2}{3^2 \cdot r^2} \\ & = \frac{1}{9} \cdot \boxed{\dfrac{k q_1 q_2}{r^2} } \\ & = \frac{1}{9} f & & \left(\text{\footnotesize since $ f = \tfrac{k q_1 q_2}{r^2}$}\right) \end{aligned}$

Answer from: Quest

What is on your multiple choice anwers

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