1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
choli [55]
1 year ago
15

Students are experimenting with circuits in their physics class and they build the two working circuits pictured below. The batt

ery in each circuit is identical and each bulb (resistor) they add provides the same amount of resistance.
They notice that every time they added bulb 3 (R3) to Circuit A, the brightness of all the bulbs dimmed but when they added bulb 3 (R3), nothing changed in the brightness of the bulb.  Which explanation of this observation is most complete?

Question options:

The brightness of the bulbs is all about the total amount of voltage at each resistor: less voltage = dimmer bulbs.  Circuit A is a series circuit, so the voltage of the battery is divided across all of the resistors.  Circuit B is a parallel circuit so the voltage across each resistor in parallel is the same as the battery. 

The brightness of the bulbs is all about the total amount of current in the circuit: less current = dimmer bulbs.  Circuit A is a series circuit, the more resistors you add, the less total current you get.  Circuit B is a parallel circuit so the more resistors you add, the more total current you get. 

The brightness of the bulbs is all about the total amount of resistance in the circuit: more resistance = dimmer bulbs.  Circuit A is a series circuit, so every time you add a resistor the total resistance increases.  Circuit B is a parallel circuit, so every time you add a resistor the total resistance decreases.

The brightness of the bulbs has to do with power which considers both the voltage and the current: less voltage x less current = dimmer bulbs.  In circuit A, the voltage is divided across the resistors and the current decreases as resistance increases.  In circuit B, the voltage is the same in each parallel section of the circuit and the current through that section of the circuit only depends on the resistor in that section.


​

Physics
1 answer:
bija089 [108]1 year ago
4 0

The complete observation about adding bulb 3 is the brightness of the bulbs has to do with power which considers both the voltage and the current: less voltage x less current = dimmer bulbs.  In circuit A, the voltage is divided across the resistors and the current decreases as resistance increases.  In circuit B, the voltage is the same in each parallel section of the circuit and the current through that section of the circuit only depends on the resistor in that section.

<h3>What is power of the circuit?</h3>

The power of the bulb or any resistor is equal to the product of voltage and  current flowing through it.

P = VI

Circuit A has bulbs in series while the circuit B has bulbs in parallel.

When bulb 3 added to circuit A,  the brightness of all the bulbs dimmed but when bulb 3 (R3) added to circuit B, nothing changed in the brightness of the bulb.

The brightness is depended on the power of the circuit. When both the voltage and current are less, the bulb will be dimmed. In circuit A, series resistors divide the voltage across them. In circuit B, voltage is equal for all the resistors.

Thus, the last option is correct.

Learn more about power.

brainly.com/question/2933971

#SPJ1

You might be interested in
Which of the following is an example of an incline plane? a) lever b)gear c)pulley d)screw
slega [8]
Gear because each spike is a wedge shape that adds a mechanical advatage
3 0
3 years ago
Read 2 more answers
?
Nana76 [90]

Answer:

Electron shell

Nucleus

Neutrons

Explanation:

An atom is made up of three fundamental subatomic particles which are the protons, neutrons and electrons.

  • Protons are the positively charged particles. Neutrons do not carry any charges.
  • Both protons and neutrons are found in the tiny nucleus at the center of that atom.
  • The electrons are negatively charged.
  • They are found outside the nucleus in electronic shells.
5 0
3 years ago
How can the atomic number of nitrogen be determined?
Doss [256]

Answer:

So... for the element of NITROGEN, you already know that the atomic number tells you the number of electrons. That means there are 7 electrons in a nitrogen atom. Looking at the picture, you can see there are two electrons in shell one and five in shell two.

4 0
2 years ago
What minimum heat is needed to bring 250 g of water at 20 ∘C to the boiling point and completely boil it away? The specific heat
Amiraneli [1.4K]

Answer:633.8 KJ

Explanation:

Given

mass of water\left ( m\right )=250gm

Initial temperature\left ( T_i\right )=20^{\circ}C

Final temperature \left ( T_f\right )=100^{\circ}C

Specific heat of water \left ( c \right )=4190 J/kg-k

heat of vaporization\left ( L\right )=22.6\times 10^5 J/kg

Heat required for process\left ( Q\right )=heat to raise water temperature from 20 to 100 +Heat to vapourize water completely

Q=mc\left ( T_f-T_i\right )+mL

Q=0.25\times 4190\times \left ( 100-20\right )+0.25\times 22\times 10^5

Q=\left ( 0.838+5.5\right )\times 10^5

Q=6.338\times 10^5J=633.8 KJ

4 0
3 years ago
Analyze why a body undergoing uniform motion eventually comes to rest even in the
djverab [1.8K]

Answer:

It happens due to force of friction

Explanation:

If a body is performing a uniform motion and no external unbalanced force appears to apply on it, then  the body will come to rest after certain time. The reason behind this is the force of friction that is applied in opposite direction of the motion. So, when there is no apparent unbalanced force it means that the only force acting on the body is the force of friction. This force of friction tends to stop the motion after some period of time, because it is acting in the direction opposite to that of motion.

Hence, the reason behind a body undergoing uniform motion eventually stops is <u>Force of Friction.</u>

8 0
3 years ago
Other questions:
  • A ball is dropped from rest. What will be its speed when it hits the ground in each case. a. It is dropped from 0.5 meter above
    14·1 answer
  • Which of the following element has seven total valence electrons? Your answer: argon helium oxygen bromine
    8·1 answer
  • If mechanical energy is conserved in a system the energy at any point in time can be in the form of
    11·1 answer
  • Which of the following was not a famous basketball player for the NBA? Select one: a. Wilt Chamberlain b. Lady Bird Johnson c. M
    13·1 answer
  • ________ in the ear change sound waves to electrical signals that the brain can interpret as sounds
    11·1 answer
  • Write a collision scenario here. If you choose your own collision, you can have neither, one, or both of the objects break. Be s
    13·1 answer
  • PSYW - Please Show Your Work
    8·1 answer
  • Is O2 classified as a compound?
    7·1 answer
  • Help Me Please<br>8th grade science, one question ​
    14·1 answer
  • In handball, once a player possesses the ball,
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!