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Illusion [34]
2 years ago
11

What is the current through a 25 ohm resistor connected to a 5.0 V power supply? a 0.20 A b 5.0 A c 25 A d 30 A

Physics
1 answer:
zysi [14]2 years ago
8 0
~Formula: Voltage= current• resistance
(V= Ir)
~Using this formula, plug in the numbers from the equation into the formula
~5=25i
~Now you have a one-step equation
~Divide by 25 on both sides and you should get your answer:
~I= 0.2 (which means current is 0.2)
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A linear network has a current input 7.5 cos(10t + 30°) A and a voltage output 120 cos(10t + 75°) V. Determine the associated im
Leona [35]

Answer:

16∠45° Ω

Explanation:

Applying,

Z = V/I................... Equation 1

Where Z = Impedance, V = Voltage output, I = current input.

Given: V = 120cos(10t+75°), = 120∠75°,  I = 7.5cos(10t+30) = 7.5∠30°

Substitute these values into equation 1

Z = 120cos(10t+75°)/7.5cos(10t+30)

Z = 120∠75°/ 7.5∠30°

Z = 16∠(75°-30)

Z = 16∠45° Ω

Hence the impedance of the linear network is 16∠45° Ω

8 0
3 years ago
A student carries a very heavy backpack. To lift the backpack off the ground, the student must apply 80 N of force to do so. The
Xelga [282]

The work done on the backpack by the student applies 80 N of force to lift the backpack 1.5 m is 120J.

<h3>How to calculate work done?</h3>

Work done is a measure of energy expended in moving an object; most commonly, force times distance.

It is said that no work is done if the object does not move, hence, the work done on an object can be calculated as follows:

Work done = Force × Distance

According to this question, a student carries a very heavy backpack and to lift the backpack off the ground, the student must apply 80 N of force to lift the backpack 1.5 m.

Work done = 80N × 1.5m

Work done = 120J

Therefore, the work done on the backpack by the student applies 80 N of force to lift the backpack 1.5 m is 120J.

Learn more about work done at: brainly.com/question/28172139

#SPJ1

8 0
1 year ago
What is smallest unit of time.Express its value
Sever21 [200]

1s = 1.0 \times  {10}^{ - 24} s \:  \: = 1ys
1 ys is the smallest unit of time.
7 0
3 years ago
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If you change the distance between two charged objects, A and B, which of
mars1129 [50]

The factors which are affected will be  based on the distance or range between the charged objects A and  B

<u>Explanation:</u>

<u>Definition:</u>

  • The force, F among the two-point size charges A and B are divided by a range  r is given by Coulomb formula.

F=9x10^9 AB/r²

<u>Factors:</u>

  • If the range among them is doubled the force will be decreased to 1/4 of the initial value. And if the range is split, the force will be four times.
  • If the range among them is tripled, the force will be decreased to 1/9 of the initial value. If the range is decreased to one-third of the new value, the force will rise to Nine times the initial value.

4 0
3 years ago
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How is a dam used to generate electric energy?
Alexxandr [17]

Answer:

Hydroelectric

Explanation:

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  • The quantity of energy that can be generated depends on the volume of water available and the difference in height between the water’s source and its outflow.
5 0
3 years ago
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