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
zaharov [31]
2 years ago
10

We can model a certain battery as a voltage source in series with a resistance. The open-circuit voltage of the battery is 10 V

. When a 120-Ω resistor is placed across the terminals of the battery, the voltage drops to 7 V. Determine the internal resistance of the battery.
Engineering
1 answer:
Angelina_Jolie [31]2 years ago
3 0

Answer:

51.4 Ohms

Explanation:

By applying voltage division rule

V_f=v_i\times \frac {R_l}{R_l+R_m} where v is voltage, subscripts i and f represnt initial and final, R is resistance, m is internal and l is external.Substituting 7V for final voltage, 10V for initial voltage and the external resistance as 120 Ohms then

7=10*\frac {120}{120+R_m}\\7R_m+840=1200\\R_m={1200-840}{7}=51.428571\approx 51.4 Ohms

You might be interested in
Problem 1: A catchment has the following Horton’s infiltration parameters: f0=280 mm/hr, fc=25 mm/hr and k = 2.5 hr-1 . For the
harkovskaia [24]

Answer:

Ponding will occur in 40mins

Explanation:

We say that the infiltration rate is the velocity or speed at which water enters into the soil. This often times is measured by the depth (in mm) of the water layer that can enter the soil in one hour. An infiltration rate of 15 mm/hour means that a water layer of 15 mm on the soil surface, will take one hour to infiltrate.

Consider checking attachment for the step by step solution.

6 0
3 years ago
tech A says that a Hall-effect sensor can be used in an electronic ignition system. Tech B says that an optical-type sensor can
Alex

Answer:

<em>Both Tech A and Tech B are correct.</em>

<em>Explanation:</em>

<em>The Hall effect sen sensor are used to control displacements and rotations of various body components  of the vehicles, engine vibrations , and the ignition   system</em>

<em>The  optical-type sensor converts rays of light  into electronic signals. It measures the quantity physically of which the translates to a form that is understandable or readable  by an instrument. An optical sensor is larger part of a  system that integrates light sources, a device for measuring  and the optical sensor, which therefore is usually  connected to an electrical trigger.</em>

6 0
3 years ago
In the circuit below I 1=20mA V1=10 R1=400 R2=2000 R3=1000. Use node analysis to find R2
Hatshy [7]

Answer:0.2A

Explanation:

First, write KCL

i1-i2-i3=0

Then, replace currents with viltages and resistors.

V2-10v/100-v2/200-v2/400=0

V2-40=0

V2=40v

I hope it was helpful

6 0
3 years ago
Any one here play animal crossing new horizons<br> if so wanna play
Oksanka [162]

Answer:

That's your Q seriously. Your funny. I don't have animal crossing but I do have league of legends.

Explanation:

8 0
3 years ago
Read 2 more answers
True or false? the arc welding power voltage used for GMAW and FCAW produces a constant voltage​
7nadin3 [17]

Answer:

False

Explanation:

3 0
2 years ago
Other questions:
  • A sample of wastewater is diluted 10 times. The diluted solution has an ultimate biochemical oxygen demand (BOD), Lo, of 30 mg/L
    9·1 answer
  • In a steady flow device, the properties of the system remains constant with time. a)True b) False
    10·1 answer
  • Se requiere un permiso aprobación o restricción contaminante para todos los métodos comerciales de descarga de aguas residuales
    13·1 answer
  • Create an abstract class DiscountPolicy. It should have a single abstract method computeDiscount that will return the discount f
    7·1 answer
  • State five applications of thermochromic materials
    11·1 answer
  • When an output gear is larger than the input gear the greater ratio is greater than 1 T or F​
    9·1 answer
  • Rosita is planning an investigation to determine how a lifeboat's shape affects its
    8·1 answer
  • 8. What is the purpose of the 300 Log?
    12·1 answer
  • Accidents occur as a result of ____ and ____.
    7·1 answer
  • What are the rigging devices used to move loads such as steel plates and sheet piles without the use of slings, but grip the loa
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!