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Olenka [21]
3 years ago
9

The charger for your electronic devices is a transformer. Suppose a 60 Hz outlet voltage of 120 V needs to be reduced to a devic

e voltage of 3.0 V. The side of the transformer attached to the electronic device has 45 turns of wire.
Part A


How many turns are on the side that plugs into the outlet?


N = turns
Physics
2 answers:
Charra [1.4K]3 years ago
8 0

Answer:

NP=180Turns

Explanation:

Step one :

Given data

VP = the primary voltage. 120volts

VS = the secondary voltage. 30volts

NP = the number of turns in the primary winding.???

NS = the number of turns in the secondary winding. 45 turns

Step two :

Using the formula

NP/NS = VP/VS

NP/45 = 120/30

multiplying both sides by 45 to make NP subject of formula we have

NP=(120/30)*45

NP=(4)*45

NP=180Turns

A transformer is an electrical apparatus designed to convert alternating current from one voltage to another. It can be designed to "step up" or "step down" voltages and works on the magnetic induction principle.

There are two types of transformers

Step up transformer

Step down transformer

Aloiza [94]3 years ago
7 0

Answer:

180 turns

Explanation:

Transformer: A transformer is an electrical device that operates based on the principle of electromagnetic induction.

Using

Ns/Np = Vs/Vp.............................. Equation 1

Where Ns = Number of turns in the secondary coil, Np = Number of turns in the primary coil, Vs = Voltage in the secondary coil, Vp = Voltage in the primary coil

Make Np the subject of the equation

Np = Ns(Vp/Vs)................... Equation 2

Given: Ns = 45 turns, Vp = 120 V, Vs = 30 V

Substitute into equation 2

Np = 45(120/30)

Np = 180 turns.

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Three electromagnetic waves travel through a certain point P along an x axis. They are polarized parallel to a y axis, with the
chubhunter [2.5K]

Answer:

4.846*10^{-5} sin(5*10^{14}t )

Explanation:

Frequency of each electromagnetic wave is same thus we can interfere them along X axis in Phase diagram.

In phase diagram indicate each wave as vector with amplitude as length and phase difference as angle. (shown in attachment)

Now take component of E2 and E3 amplitude along X direction.

Net amplitude of all E in X direction = 4*10^{-5} + cos(45)[ 6*10^{-6} +  6*10^{-6} ]

⇒  4.846*10^{-5}

Final resultant have no change in frequency

So , resultant is 4.846*10^{-5} sin(5*10^{14}t )

6 0
4 years ago
Two physics students are standing on skateboards and facing each other. Their masses, including the skateboards, are 95 kg and 5
andrey2020 [161]

Answer:

1) \sum \vec p=0\ kg.m.s^{-1}

2) v_2=55.078\ m.s^{-1}

Explanation:

Given:

  • mass of heavier student, m_1=95\ kg
  • mass of lighter student, m_2=58\ kg
  • velocity of the heavier student after the mutual push, v_1=3.1\ m.s^{-1}

1)

Since they push each other and we are neglecting any friction that means we can consider this as a perfectly elastic collision. So the momentum of the two bodies will be equal and in opposite direction.

Since momentum is a vector quantity so the total momentum of the system as a whole will be zero.

2)

<u>From the condition of elastic collision:</u>

p_1=p_2

m_1.v_1=m_2.v_2

95\times 3.1=58\times v_2

v_2=55.078\ m.s^{-1}

6 0
4 years ago
A 10kg block is Pulled along a horizontal
Vlad1618 [11]

Answer:

hope u can understand the method

6 0
3 years ago
When a high-mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse
faust18 [17]

Answer:

The core beings to fuse carbon into heavier elements.

Explanation:

As the star runs out of hydrogen and helium, the energy production in the core stops, and there isn't enough outward pressure to hold the star up. The start contracts, and this heats up the core (pressure increases, temperature increases)  creating temperatures high enough to fuse carbon into heavier elements like oxygen, silicon, neon, sulfur, magnesium, and iron.

But a star can sustain itself on Carbon fusion only for so long. In about 600 years (how long exactly depends on the star ) the star runs out of carbon and what happens next depends on the mass of the star; the star either collapses into a neutron star, or begins fusion heavier elements like neon.

7 0
4 years ago
Read 2 more answers
A bullet is shot from a rifle with a velocity of 720 m/s. What is the velocity of the bullet in km/h.
Elan Coil [88]

Answer:

2592 km/h

Explanation:

Given that a bullet is shot from a rifle with a velocity of 720 m/s. What is the velocity of the bullet in km/h.

The velocity = 720 m/s

Solution

To convert metres per second to kilometer per hour, you will multiply by 3600 and divide by 1000

720 × 3600/1000

720 × 3.6

72 × 36

2592 km/h

Therefore, the velocity of the bullet in kilometer per hour is 2592 km/h

8 0
4 years ago
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