Topics:

A 61.6 turns circular coil with radius 4.44 cm and resistance 2.34 Ω is placed in a magnetic field directed perpendicular to the

Setler [38]

Answer:

Induced emf is 0.324 V

Explanation:

We have,

Number of turns, n = 61.6

Radius of circular coil, r = 4.44 cm

Resistance of coil, R = 2.34 Ω

The magnitude of the magnetic field varies in time according to the expression :

$B=a_1t+a_2t^2$

$a_1=0.0411\\\\a_2=0.044$

The magnitude of the induced emf in the coil is given by :

$\epsilon=\dfrac{d\phi}{dt}\\\\\epsilon=\dfrac{d(NBA)}{dt}\\\\\epsilon=NA\dfrac{dB}{dt}$

$\epsilon=\pi r^2\dfrac{dB}{dt}$

At t = 9.21 s,

$\dfrac{dB}{dt}=(0.0411+2\times 0.044 \times 9.21)\\\\\dfrac{dB}{dt}=0.851\ T/s$

$\epsilon=61.6\times \pi \times (4.44 \times 10^{-2})^2\times 0.851$

$\epsilon=5.27\times 10^{-3}\ V$

So, the magnitude of the induced emf in the coil is 0.324 V

5 0

4 years ago

A value that describes how heavy an object is and is related to the force of gravity is:

Sergio [31]

The weight of an object

6 0

3 years ago

Read 2 more answers

The emission spectra you obtained from a star show a hydrogen spectrum that is shifted toward the blue end of the electromagneti

kvasek [131]

Answer:

The correct option is;

The star is moving toward Earth.

Explanation:

The shifting of the wavelength of light wave toward the blue end of the electromagnetic spectrum is termed blue shift.

A blue-shift of an electromagnetic wave corresponds to the wavelength decrease of the wave, which is equivalent increase in energy, resulting in an increase in the observed frequency of the wave.

Astronomers make use of the shifting of the wavelength of a wave to understand the relative motion of galaxies.

The wavelength of an approaching electromagnetic ave shifts towards the blue end of the electromagnetic spectrum because the wavelength is shorter.

The opposite of phenomenon is red-shift.

4 0

3 years ago

The drawing shows four sheets of polarizing material, each with its transmission axis oriented differently. Light that is polari

storchak [24]

Answer:

Explanation:

At the point when light is vertically polarized is incident on the polarizer whose axes are situated at angle points $\theta _1 , \theta _2 , \theta _3$ the intensity power in the wake of going through all the polarisers is given by the Malus law, applied threefold for every one of the three axes.

$I = I_o \ cos \theta _1 \ cos \theta _2 \ cos \theta _ 3$

The heading of the direction of the polarization is equivalent to the pivoted axes of the polarizer provided that light is an electromagnetic wave, its course of polarization is therefore controlled by the electric field part.

∴

a)

When sheet A is removed, the transmitted light goes through B, at 30°.

$I = I_o \ cos ^2 \theta _1 \ cos ^2 \theta _2 \ cos^2 \theta _3$

$I = 20 \ cos ^2 30 \ cos ^2 60 \ cos ^2 30$

$I = 2.81 \ W/m^2$

b)

When B is removed, No light passes since the axis of A and the axis of C are perpendicular to each other.

c)

When C is removed, the intensity is indeed zero since the axes are aligned and adjusted at 90° to one another.

$\mathbf{d) \ I - I_o cos^2 (0) cos^2 (30) \ cos^2 (60)}$

$\mathbf{d = 3.75 \ W/m^2}$

3 0

3 years ago

Three containers are filled with water to the same height and have the same surface area at the base, but the total weight of wa

wolverine [178]

Answer:

Jajshdjdvjs kavisvdjs isvgsk isvisvsfj usyuwvsiu is the season to bring you the next one you want we are all you ware to bring back to the new course you will send me your phone number ywouw

Explanation:

4 0

3 years ago