Can someone please help me with this? <br>

A magnet is pushed into a solenoid of 20 coils with a cross-sectional area of 4.0x10-4 m2. As a result, the magnetic field insid

kobusy [5.1K]

Given:

The number of the coils, N=20

The cross-sectional area of the solenoid, A=4.0×10⁻⁴ m²

The magnetic fields, B₁=0.0500 T

and B₂=0.180 T

The time interval, t=1.90 s

The resistance of the resistor, R=1.90 s

To find:

1. The magnitude of the induced emf.

2. The current flowing through the resistor.

Explanation:

1.

The magnitude of the induced emf in the solenoid is given by,

$E=NA\frac{(B_2-B_1)}{t}$

On substituting the known values,

$\begin{gathered} E=20\times4.0\times10^{-4}\times\frac{(0.180-0.0500)}{1.90} \\ =0.55\times10^{-3}\text{ V} \\ =0.55\text{ mV} \end{gathered}$

2.

From Ohm's law, The induced emf is given by,

$E=IR$

On substituting the known values,

$\begin{gathered} 0.55\times10^{-3}=I\times5 \\ \Rightarrow I=\frac{0.55\times10^{-3}}{5} \\ =0.11\times10^{-3}\text{ A} \\ =0.11\text{ mA} \end{gathered}$

Final answer:

1. The induced emf is 0.55 mV

2. The current through the given resistor is 0.11 mA

4 0

2 years ago

Which would be a good analogy of wave motion

inessss [21]

I think (C )
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3 0

3 years ago

Read 2 more answers

You are told to walk due east for 50 paces, then 30 degrees north of east for 38 paces, and then due south for 30 paces. What is

Tom [10]

Answer:

$\vec d_t=\ paces$

Explanation:

<u>Displacement</u>

It's a vectorial magnitude to measure the linear space between two points, It's usually computed as the subtraction of the final point minus the initial point. To find the sum of a sequence of displacements, we must sum the vectors.

In this problem, we see the 'pace' as a unit of length. We'll use it without attempting to convert it to any other standard unit. We'll also assume the positive direction to be east and north in both axes x,y respectively.

The first displacement is 50 paces due east. Let's assume the object starts from the origin (0,0)

Since the displacement is due east, the vertical component is zero, so

$\vec d_1=$

The second displacement is 38 paces 30 degrees north to east. We must find the x and y coordinates of this displacements

$\vec d_2=$

The third displacement is 30 paces due south. This time, the x-coordinate is zero and the y-coordinate is negative

$\vec d_3=$

The total displacement is the sum of all three above:

$\vec d_t=\vec d_1+\vec d_2+\vec d_3$

$\vec d_t=++$

$\vec d_t=\ paces$

4 0

3 years ago

8. A Ferris wheel with diameter 18 m and rotates with constant speed of 3.8 ms.

icang [17]

いいおどねっっmhjっっっhごおおygvhっっっj

6 0

3 years ago

1. In what type of ecosystem can monkeys population be found?

sp2606 [1]

I, thank you for posting your question here at Brainly.

Here are the answers to your questions:

1. Monkeys live in tropical rainforest ecosystems.
2. Animals should be left alone in nature to take part in the balance of the ecosystem, and not upset it. A sudden increase of monkey population, probably due to destruction of rainforests which lead to lesser area of living for them.
3. Monkeys take a huge part in seed dispersal among flesh fruit plants. Without them, it will greatly affect the conservation of the forests.

3 0

3 years ago

Can someone please help me with this? ​

Can someone please help me with this?