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3 years ago

The magnetising current in a transformer is rich in ______________ harmonic?

1 answer:

5 0

The magnetizing current in a transformer is rich in 3rd harmonic. This is because harmonics are AC voltages and currents with frequencies that are generally higher.

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Pendulum A has a bob of mass m hung from the string of length L; pendulum B is identical to A except its bob has the length 2L.

GenaCL600 [577]

Answer:

$f_{B}: f_{A} = \sqrt{\frac{2}{1}}$

Explanation:

For pendulum A: Length = L and gravity = g

The frequency of pendulum A is given by

$f = \frac{1}{2\pi }\sqrt{\frac{g}{L}}$

Here, f is the frequency, L be the length

$f_{A} = \frac{1}{2\pi }\sqrt{\frac{g}{L}}$ ... (1)

For pendulum B: Length = 2L, gravity = g

The frequency of pendulum B is given by

$f_{B} = \frac{1}{2\pi }\sqrt{\frac{g}{2L}}$ .... (2)

Divide equation (1) by (2)

$f_{B}: f_{A} = \sqrt{\frac{2}{1}}$

5 0

3 years ago

Pls help I will mark brainliest

xenn [34]

10) A

11) C (i think)

12) D (i think)

6 0

3 years ago

Read 2 more answers

10. A spring whose composition is not completely known might be either bronze (sp gr 8.8) or brass (sp gr 8.4). It has a mass of

frez [133]

The element used is of bronze.

Now before we find out how we got the answer as bronze, firstly let us understand about the device we are talking about. That is, spring.

What exactly is a spring?

A spring is defined as a device that changes its shape in response to an external force, returning to its original shape when the force is removed. If we apply force or pressure in this device, it will change its shape but the moment we stop applying force, it will come back to its original state.

This means that this device is made of something flexible. So, the material it is made up of should also be flexible in nature.

How to find out flexibility of spring?

Flexibility of spring can be found as q = f Q, where f is the spring flexibility.

Here, in this question, we are given the mass of element in air and water. This shows a slight comparison between the mass of that particular element in air and water and thus, we get to know it is trying to draw our attention towards density.

Here, we have mass in air and water, thus, we can determine the density.

From these numbers, we can know that the density given is of bronze.

Hence, the element used is Bronze.

To know more spring aggregate, refer : brainly.com/question/20215636

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7 0

1 year ago

Match the following activities.

Alexus [3.1K]

DON’T CLICK THE LINK. Last one is 6. Force of wind. Kind of force that pulls things toward the center of the earth is force of gravity. Metric measurement one is Newton-meter.

7 0

3 years ago

An Alaskan rescue plane traveling 45 m/sdrops a package of emergency rations froma height of 145 m to a stranded party of reese

Artist 52 [7]

Answer:

package will strike at a distance of 244.7 m

Explanation:

Given data;

Velocity of plane 45 m/s

Acceleration due to gravity 9.8 m/s^2

horizontal component of plane velocity is ux = 45 m/s

vertical component is zero

in the same way

ay = - 9.8 m/s^2

ax = .0 m/s^2

motion in y direction = -145 m

from equation of motion time of flight is

$s = ut + \frac{1}{2} at^2$

$-145 = 0 + \frac{1}{2} (-9.8) t^2$

solving for t we get

t = 5.439 sec

Motion in x direction

$s = ut + \frac{1}{2} at^2$

$= (45 \times 5.43) + \frac{1}{2} (0) 5.43^2$

s = 244.79 m

Therefore package will strike at a distance of 244.7 m

4 0

3 years ago