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
SVEN [57.7K]
3 years ago
8

At one point in the circuit, there is an LED and a resistor in parallel with one another. If you measure the voltage drop across

the LED as 2.1 V and the current through the LED as 20 mA, you know: Group of answer choices a) The current through the resistor is 20 mA b) The voltage drop across the resistor is 2.1 V and its current is 20 mA c) The voltage drop across the resistor is 2.1 V nothing about the current through or voltage drop across the resistor.
Physics
1 answer:
kifflom [539]3 years ago
7 0

Answer:

C. The voltage drop across the resistor is 2.1V and nothing about the current through the resistor.

Explanation:

When connected in parallel, voltage across the resistances are the same. So if 2.1V was dropped across the LED then 2.1V was also dropped across the resistor. However, this tells us nothing about the current through the resistor. We can find the current across the resistor if we know the resistance of the resistor, but that's about it.

If it were a series connection, then the current would have been the same, but the voltage drop were another story.

You might be interested in
The steps taken in scientific studies often follow similar patterns. which answer correctly describes the order in which the ste
scZoUnD [109]
OPTION A WOULD BE YOUR ANSWER
7 0
3 years ago
Read 2 more answers
Which of the following distinguishes the isotope uranium-238 from the isotope uranium-235?
WITCHER [35]

Answer: A

Explanation:

Isotopes of different elements differ by the number of neutrons inside the nucleus.

8 0
2 years ago
Read 2 more answers
Explain why does the bowling ball decelerate as it travels along the lane
frutty [35]

The main cause of this is Friction. The more oil that is laid down, the less friction there is between the ball and the lane surface. The less friction, the harder it is for the bowler to send the ball in a curved path imparted by the spin that the bowler puts on the ball at the instant of release.

5 0
3 years ago
Water from a vertical pipe emerges as a 10-cm-diameter cylinder and falls straight down 7.5 m into a bucket. The water exits the
cupoosta [38]

The diameter of the column of the water as it hits the bucket is 4.04 cm

The equation of continuity occurs in the fluid system and it asserts that the inflow and the outflow of the volume rate at the inlet and at the outlet of the system are equal.

By using the kinematics equation to determine the speed of the water in the bucket and applying the equation of continuity to estimate the diameter of the column, we have the following;

Using the kinematics equation:

\mathbf{v_f ^2 = v_i^2 + 2gh}

\mathbf{v_f ^2 =(2.0)^2 + 2\times 9.8 \times 7.5}

\mathbf{v_f ^2 =151 m/s}

\mathbf{v_f  =\sqrt{151 m/s}}

\mathbf{v_f  =12.29 \ m/s}  

From the equation of continuity:

\mathbf{A_iV_i = A_fV_f}

\mathbf{\pi r^2_iV_i = \pi r^2_fV_f}

\mathbf{ r^2_iV_i =  r^2_fV_f}

\mathbf{ (\dfrac{10}{2})^2\times 2.0 =  r_f^2 \times 12.29}

\mathbf{ 50 = 12.29 \times r_f^2}

\mathbf{ r_f=  \sqrt{\dfrac{50}{12.29} }}

\mathbf{ V_f= 2.02 \ cm }

Since diameter = 2r;

∴

The diameter of the column of the water is:

= 2(2.02) cm

= 4.04 cm

Learn more about the equation of continuity here:

brainly.com/question/10822213

6 0
2 years ago
How does an an electron microscope work?
EastWind [94]
<em>it works on the following principals:

</em>

5 0
3 years ago
Read 2 more answers
Other questions:
  • A bowling ball rolls 33\,\text m33m33, start text, m, end text with an average speed of 2.5\,\dfrac{\text m}{\text s}2.5 s m ​ 2
    13·1 answer
  • A ray of light is moving from a material having a high indexof refraction into a material with a lower index of refraction.
    13·1 answer
  • Calculate the energy in kilowatt hours used by a heater that operates continuously for 30 minutes. The heater has a power rating
    7·1 answer
  • Nicole throws a ball straight up. Chad watches the ball from a window 6.10m above the point where Nicole released it. The ball p
    11·1 answer
  • Click on the reset button, and stack one 50kg. crate on top of the other, so that the total mass is 100kg. The Friction should b
    7·1 answer
  • A group of students use a scale to measure the mass of an object. Which of the following would be the appropriate base unit of m
    9·1 answer
  • Cardiovascuar exercise involves
    12·1 answer
  • I believe the answer is D but wanted to make sure.
    9·2 answers
  • Changr 20 min in to hr​
    5·1 answer
  • One consequence of Newton's third law of motion is that __________. A. Every object that has mass has inertia B. A force acting
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!