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Marina CMI [18]
3 years ago
8

An ideal step-down transformer is needed to reduce a primary voltage of 120 V to 6.0 V. What must be the ratio of the number of

turns in the secondary to the number of turns in the primary
Physics
1 answer:
Julli [10]3 years ago
7 0

Answer:

N_s :  N_p = 20 : 1

Explanation:

From the question we are told that

    The primary voltage is  V_p  =  120 \  V

     The secondary voltage is  V_s  =  6 \  V    

     

Generally from the transformer equation we have that

        \frac{V_p}{V_s}  =  \frac{N_p}{N_s}

So

       \frac{120}{6}  =  \frac{N_p}{N_s}

=>      \frac{N_p}{N_s} = 20

Therefore the ratio of the number of turns in the secondary to the number of turns in the primary is  

       N_s :  N_p = 20 : 1

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a 350 n force is required to accelerate a giant tortoise at 7 m/s2. what is the weight of the tortoise​
irina1246 [14]

Answer:

50kg

Explanation:

mass = force/acceleration

50kg = 350/7

3 0
4 years ago
What is the change in electric potential energy in moving an electron from a location 3 × 10-10 m from a proton to a location 7
joja [24]

Answer:

4.39 x 10^-19 J

Explanation:

q1 = 1.6 x 10^-19 C

q2 = - 1.6 x 10^-19 C

r1 = 3 x 10^-10 m

r2 = 7 x 10^-10 m

The formula for the potential energy is given by

U1 = k q1 q2 / r1 = - (9 x 10^9 x 1.6 x 10^-19 x 1.6 x 10^-19) / (3 x 10^-10)

U1 = - 7.68 x 10^-19 J

U2 = k q1 q2 / r2 = - (9 x 10^9 x 1.6 x 10^-19 x 1.6 x 10^-19) / (7 x 10^-10)

U2 = - 3.29 x 10^-19 J

Change in potential energy is

U2 - U1 = - 3.29 x 10^-19 + 7.68 x 10^-19 = 4.39 x 10^-19 J

5 0
4 years ago
An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large positive
ArbitrLikvidat [17]

Answer:

<em>c. The astronaut does not need to worry: the charge will remain on the outside surface.</em>

<em></em>

Explanation:

The astronaut need not worry because <em>according to Gauss's law of electrostatic, a hollow charged surface will have a net zero charge on the inside.</em> This is the case of a Gauss surface, and all the charges stay on the surface of the metal chamber. This same principle explains why passengers are safe from electrostatic charges, in an enclosed aircraft, high up in the atmosphere; all the charges stay on the surface of the aircraft.

3 0
4 years ago
The step-down transformer gives a current of 10A at 24v if the primary voltage is 240v calculate the
Zepler [3.9K]

You probably do this as a DC circuit which is not quite correct, but it will get you an answer. The study is a great deal more complicated.

Problem One: Secondary Power.

W = E * I

E = 10 A

I = 24V

W = 24 * 10

W = 240 Watts.

Here's the thing you have to know. These transformers are 100% efficient (or are assumed so). So whatever wattage is in the secondary, it is the same as that in the primary.

Primary Power = Secondary Power

Secondary Power = 240 Watts

Primary Power = 240 Watts

W = E * I

E = 240 volts

W = 240 watts

I = W/E = 240 / 240

I = 1 Amp. Answer Part One

Part Two

Answered above. 240 watts.

Part Three

Answered above. 240 watts.

Secondar

7 0
3 years ago
What is the change in direction of a wave that occurs when the wave changes speed when moving from one medium to another?
Reil [10]
Maybe A makes more sense to me I guess
8 0
3 years ago
Read 2 more answers
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