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
Neporo4naja [7]
3 years ago
10

A 150-W lamp is placed into a 120-V ac outlet. What is the peak current?

Physics
2 answers:
Sidana [21]3 years ago
8 0

This question is about as sneaky as they ever get.

First let's do the easy part:

Power = (voltage) x (current)

150 watts = (120 volts) x (current)

current = (150 watts) / (120 volts)

current = 1.25 Amperes <u>but this is NOT the answer to the question</u>.

The voltage at the outlet is a "sinusoidal" wave ... it wiggles up and down 60 times every second.  The number of "120 volts" is NOT the "peak" of the wave.  In fact , the highest it ever gets is  √2  greater than 120 volts.  And all of this applies to the current too.

The RMS current through the lamp is (150/120) = 1.25 Amperes .

The <em>peak </em>current through the lamp is  1.25·√2 = about <em>1.77 Amperes</em> .

devlian [24]3 years ago
3 0

Answer:

Explanation:

Formula

W = I * E

Givens

W = 150

E = 120

I = ?

Solution

150 = I * 120   Divide by 120

150/120 = I

5/4  = I

I = 1.25

Note: This is an edited note. You have to assume that 120 is the RMS voltage in order to go any further. That means that the peak voltage is √2 times the size of 120. The current has the same note applied to it. If the voltage is its rms value, then the current must (assuming the properties of the bulb do not change)

On the other hand, if the voltage is the peak value at 120 then 1.25 will be correct.

However I would go with the other answerer's post and multiply both values by  √2

You might be interested in
Two forces act in opposite directions on a wood block. What will happen if the forces are unbalanced?
mihalych1998 [28]

Answer: Its the last one: The position of the block will change

Explanation: Since the forces are unbalanced, one side of the block will be stronger, therefore making the block move.

8 0
3 years ago
What's a broad flat volcano created by quiet eruptions
Evgesh-ka [11]
A shield Volcano

The other, Larger Volcano with steeper sides is a composite volcano
4 0
3 years ago
Calculate the kinetic energy of a 10kg cart traveling at 4 m/s?
ycow [4]

Answer:

Explanation:

Ke = 1/2mv2 = 1/2.10.(4)2=5.16= 80 J

5 0
3 years ago
Read 2 more answers
(NO LINKS) A carpenter strikes a nail with a hammer, pushing it into wood.
Andrej [43]

Answer:

D, Im not very sure about this but I would say D

Explanation:

I tried

6 0
2 years ago
Tarzan swings back and forth on a long vine with a period of 7.27 s. how long is the vine?(unit=m)
lana [24]

Answer:

Tarzan, who weighs 688N, swings from a cliff at the end of a convenient vine that is 18m long. From the top of the cliff to the bottom of the swing he descends by 3.2m.

Explanation:

3 0
3 years ago
Other questions:
  • Jane slowly paddles her canoe across a calm lake. Explain what makes the boat moves forward. What principle best explains this s
    9·1 answer
  • What is a lunar eclipse summary
    14·2 answers
  • If you push hard enough to make a scale read 9 pounds, that is about 40 Newtons. So Newtons are a smaller unit... True or False
    8·1 answer
  • ¿Qué sucede con la Energía interna de un sistema cuando sobre él se efectúa trabajo? ¿Qué ocurre con su temperatura?
    6·1 answer
  • Im B O R E D someone please entertain me :(
    7·1 answer
  • A 100g object begins falling from a height of 5 meters. If g, the acceleration of gravity, is 10 m/s2, how long do you calculate
    5·1 answer
  • Is momentum proportional or inversely proportional to mass?
    14·1 answer
  • What is the time taken for a 80kg mountain climber to climb a 200m mountain ? power output=0.1hp​
    12·1 answer
  • The teacher measured the maximum height and the minimum height of the plastic duck above the screen as the wave passed. The teac
    15·1 answer
  • Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around th
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!