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
faltersainse [42]
2 years ago
7

A-Some resistors are labelled with a red band. This shows that their true resistance will be within 2, point, 0, percent,2.0% of

the value shown on the side. What is the largest current you would expect through a 15kΩ, 2.0% resistor when connected to a 5, point, 0, V,5.0V supply? Give your answer in m, A, mA.
B- When both of a car's red tail lamps are lit, this 'draws' a current of 0, point, 83, A,0.83A from the battery.Given that a car battery has a voltage of 12, V,12V, what is the resistance of each lamp? The lamps are wired in parallel.
Physics
1 answer:
tino4ka555 [31]2 years ago
4 0

A–The ratio of the voltage to the maximum resistor value gives the

largest current of 340.14 mA. In B–The lamp resistance is 28.9 Ω each.

Responses (approximate values):

A- The largest current is <u>340.14 mA</u>

B- The resistance of each lamp is 28.9 Ω

<h3>Which methods can be used to find the current and resistances?</h3>

The range of values of the resistor = ±2%

The magnitude of the given resistor, R = 15 kΩ

The voltage supply, V = 5.0 V

Required:

Largest current, <em>I</em>, expected through the resistor.

Solution:

Current, \, I = \mathbf{\dfrac{V}{R}}

The current is largest when the resistor's value is smallest, which gives;

  • Largest \ current, \, I_{max} = \mathbf{ \dfrac{ 5.0 \, V}{\left(15 - \frac{2}{100} \times 15 \right) \Omega}}  = \dfrac{50}{147} \, A \approx \underline{340.14 \,  mA}

B- Current drawn from car head lamps = 0.83 A

Voltage of the battery = 12 V

Required;

Resistance of each of the two lamps wired parallel.

Solution;

Let <em>R</em> represent the resistance of each lamp in the parallel connection,

we have;

Equivalent \ resistance, \, R = \mathbf{ \dfrac{1}{\frac{1}{R} + \frac{1}{R}  }} = \dfrac{R}{2}

Therefore;

\dfrac{R}{2} = \dfrac{12 \, V}{0.83 \, A}

  • The \ resistance \ of \ each \ lamp, \,  R = \dfrac{12 \, V}{0.83 \, A} \times 2 \approx \underline{28.9 \, \Omega}

Learn more about the calculations for the voltages and currents in a circuit here:

brainly.com/question/1372476

brainly.com/question/996480

brainly.com/question/868651

You might be interested in
Lực hút trái đất là dì
nataly862011 [7]
Lực hút trái đất gọi Là trọng lực
5 0
3 years ago
Calculating Displacement from the Area under a Curve Try Use the graph to answer the question What is the total displacement of
Agata [3.3K]

Answer:

175 m

Explanation:

In a velocity vs time graph, displacement is the area under the curve.

We can calculate this as area of a trapezoid:

A = ½ (10 m/s + 60 m/s) (5 s)

A = 175 m

Or, we can split the area into a rectangle and a triangle.

A = (10 m/s) (5 s) + ½ (60 m/s − 10 m/s) (5 s)

A = 175 m

8 0
3 years ago
3. what could you do to increase the precision of your measurements? What factors limit the
Vika [28.1K]

Answer:

Use specific tools built specifically for that specific measurement.

Explanation:

8 0
3 years ago
Una grúa eleva un tubo de concreto de
frozen [14]

Explanation:

Hydraulic Pressure-Control, On-Off Deluge Valve

FP-400Y-5DC

The BERMAD model 400Y-5DC is an elastomeric, hydraulic line pressure operated deluge valve, designed specifically for advanced fire protection systems and the latest industry standards. The 400Y-5DC is activated by a hydraulically operated relay valve, through which opening and closing of the valve can be controlled either with a remote hydraulic command or with a wet pilot line with closed fusible plugs. An integral pressure reducing pilot valve ensures a precise, stable, pre-set downstream water pressure. The optional valve position indicator can include a limit switch suitable for Fire & Gas monitoring systems. The 400Y-5DC is ideal for systems that combine a remote wet pilot line with a high pressure water supply.

7 0
3 years ago
1. An astronaut is getting ready to explore. If his mass is 60 kg, what is his weight<br> on Earth?
kifflom [539]

Answer:

<h3>The mass of an object is the same on Earth, in orbit, or on the surface of the Moon. ... 1N=1kg ⋅m/s2. 1 N = 1 kg · m/s 2 . ... The gravitational force on a mass is its weight. ... </h3>

Explanation:

<h3>ILY:)</h3>

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following are true for acceleration?
    12·2 answers
  • Help!!!!!!!!!!!!!!!!!plz!!!!!!!!!!!!!!!!!!!!!
    10·2 answers
  • Can some one log into my USA test prep and do Assignments for 8A - Ms. Terrelonge.
    6·1 answer
  • Calculate the amount of work done to draw a current of 8A from a point at 100V to a point at 120V in 2 seconds?
    13·1 answer
  • A two-turn circular wire loop of radius 0.63 m lies in a plane perpendicular to a uniform magnetic field of magnitude 0.219 T. I
    12·1 answer
  • Assume that the total cholesterol levels for adults are normally distributed with mean cholesterol level of 51.6 ​mg/dL and stan
    13·1 answer
  • Please help!!!...<br> Why does a parachute slow a person down?
    13·1 answer
  • 1. Which of the following best describes a nebula?
    11·1 answer
  • What is measurement ?
    14·1 answer
  • Work is best described as?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!