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
12345 [234]
2 years ago
11

DC current is flowing in the primary coil of a transformer. Which of the following DOES NOT happen? A. There is a magnetic field

in the primary
B.Current flows in the primary
C.The primary gets warm
D.Current flows in the secondary
Physics
2 answers:
Olegator [25]2 years ago
8 0

DC current is flowing in the primary coil of a transformer.

<em>Choice-D</em> is the one that does NOT happen.

A. There is a magnetic field in the primary.

Yes, just as there is around EVERY current-carrying conductor.

B. Current flows in the primary.

Yes.  The first sentence says so.

C. The primary gets warm.

Yes. Just like ANY current-carrying conductor that has any resistance.

<em>D. </em> Current flows in the secondary

<em>NO.</em>  Current in the secondary is the result of CHANGES in the primary current. Since the primary current is DC, there aren't any changes.

A long time ago, in engineering school in a galaxy far away, I learned that when you put DC into a transformer, what comes out is smoke.

GrogVix [38]2 years ago
7 0

Answer:

d

Explanation:

and just because trust me on this one my guy

You might be interested in
Helppppppppppppppp asappppppppppppp
vichka [17]
The answer to the problem b.
8 0
3 years ago
With speeds up to 90 miles per hour, what is the fastest sport on ice?.
Eddi Din [679]

Answer:

Luge

Explanation:

8 0
2 years ago
20 cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What's the new volu
Anna71 [15]

Answer:

B. V_{f}= 10\,cubic\,inches

Explanation:

Assuming we are dealing with a perfect gas, we should use the perfect gas equation:

PV=nRT

With T the temperature, V the volume, P the pressure, R the perfect gas constant and n the number of mol, we are going to use the subscripts i for the initial state when the gas has 20 cubic inches of volume and absolute pressure of 5 psi, and final state when the gas reaches 10 psi, so we have two equations:

P_{i}V_{i}=n_{i}RT_{i} (1)

P_{f}V_{f}=n_{f}RT_{f} (2)

Assuming the temperature and the number of moles remain constant (number of moles remain constant if we don't have a leak of gas) we should equate equations (1) and (2) because T_{i}=T_{f}, n_{i}=n_{f} and R is an universal constant:

P_{i}V_{i}= P_{f}V_{f}, solving for V_{f}

V_{f} =\frac{P_{i}V_{i}}{P_{f}} =\frac{(5)(20)}{10}

V_{f}= 10 cubic\,inches

6 0
3 years ago
a student that just received their driver's license decides to buy a new car. he remembers from physics class that heat engines
blsea [12.9K]

Answer: the first law of thermodynamics

Explanation:

5 0
3 years ago
If a chemical reaction has a AH value of -125 kJ, it would be considered what?
egoroff_w [7]

exothermic

Explanation:

negative means it's losing energy

4 0
2 years ago
Read 2 more answers
Other questions:
  • What velocity must a car with a mass of 1280 kg have in order to have the same momentum as a 2230?
    11·1 answer
  • An airplane flies 21 km in 30 minutes. What is its average speed in kilometers per hour?
    10·2 answers
  • Three forces are exerted on an object placed on a slope in the figure. The forces are measured in Newton (N).
    12·2 answers
  • does the wavelength of the sound increase, decrease, or stay the smae as the musician changes from the first sound to the second
    15·2 answers
  • A force of 100 newtons is applied to a box at an angle of 36º with the horizontal. If the mass of the box is 25 kilograms, what
    15·1 answer
  • Landslides and mudslides can result from both volcanoes and earthquakes.<br><br> true<br> false
    15·1 answer
  • How are musical instruments grouped?
    11·2 answers
  • As food passes through the alimentary canal, the presence of chemical secretions will occur in which order?
    5·2 answers
  • A ball bounces changing velocity from vi=15m/s[D] to vf=15m/s[U] in t=0.01s. The balls acceleration is *
    12·2 answers
  • A particle covers 10m distance in 2sec. if final velocity is 8m/s, find initial velocity​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!