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3 years ago

What is the direction of magnetic field lines inside any magnet?

Physics

2 answers:

likoan [24]3 years ago

7 0

<h2>Answer:</h2>

<u>The right option is </u><u>(C)They travel in a loop.</u>

<h2>Explanation:</h2>

The magnetic field lines point from the north pole to the south pole. Magnetic lines of force always forms closed loops. However, the magnetic field lines do not just end at the tip of the magnet. It is equally strong at the north pole when compared with the south pole.They go right through it, so that inside the magnet the magnetic field points from the south pole to the north pole.

Kruka [31]3 years ago

3 0

the answer is a because they start on the north side

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A vessel at rest at the origin of an xy coordinate system explodes into three pieces. Just after the explosion, one piece, of ma

Brilliant_brown [7]

Answer with Explanation:

We are given that

$m_1=m_2=m$

$v_1=-29 im/s$

$v_2=-29 jm/s$

$m_3=3m$

a.Initial velocity of vessel,u=0

According to law of conservation of momentum

$Mu=m_1v_1+m_2v_2+m_3v_3$

Where M=Mass of vessel

$0=m(-29i)+m(-29j)+3mv_3$

$29im+29jm=3mv_3$

$v_3=29i+29j$ m/s

Magnitude, $\mid v_3\mid=\sqrt{(29)^2+(29)^2}=29\sqrt 2m/s$

b. $\theta=tan^{-1}(\frac{v_y}{v_x})=tan^{-1}(\frac{29}{29})=45^{\circ}$

Hence, direction of the velocity of third piece=45 degree

3 0

3 years ago

A block of mass m= 2.8 kg is attached to a spring of spring constant k= 500 N/m. the block is pulled to an initial position x =

padilas [110]

Answer:

Explanation:

The energy stored in a spring

= 1/2 k x²

where k is spring constant and x is extension in the spring.

= .5 x 500 x .05²

= .625 J

Work done by friction = energy dissipated

= - μmg x d , μ is coefficient of friction , m is mass , d is displacement

= - .35 x 2.8 x 9.8 x .05

= - .48 J

energy of the mass when it reaches equilibrium position

= .625 - .48

= .145 J

If v be its velocity at that time

1/2 m v ² = .145

.5 x 2.8 x v² = .145

v² = .10357

v = .32 m /s

32 cm /s

3 0

3 years ago

A generator consists of a rectangular loop with turns of wire spinning at in a uniform magnetic field. The generator output is c

iren [92.7K]

<h3><u>Full question:</u></h3>

A generator consists of a 18-cm by 12-cm rectangular loop with 500 turns of wire spinning at 60 Hz in a 25 mT uniform magnetic field. The generator output is connected to a series RC circuit consisting of a 150 Ω and a 35 μF capacitor.What is the average power delivered to the circuit?

<h3><u>Answer:</u></h3>

The average power delivered to the circiut is 27.5 W

<h3><u>Solution:</u></h3>

Induced emf amplitude = N A B w

N- Number of turns of the coil

B- Magnetic field

$=500 \times(0.18 \times 0.12) \times 0.025 \times(2 \pi 60)$

Induced emf amplitude = 101.8 Volt

$\begin{aligned}&X_{c}=\frac{1}{(2 p i f C)}=\frac{1}{2 \times \pi \times 60 \times 35 \times 10^{-6}}\\&X_{c}=75.8\ \mathrm{ohm}\end{aligned}$

R = 150 ohm

$\begin{aligned}&z=\sqrt{\left[R^{2}+X_{c}^{2}\right]}=168 \text { ohm }\\&I_{\text {peak}}=\frac{101.8}{168}=0.606\ \mathrm{A}\\&P_{a v g}=\frac{l^{2} R}{2}=27.5\ \mathrm{W}\end{aligned}$

5 0

3 years ago

When light reflects from a surface, there is a change in its

alexandr402 [8]

The answer is: none of the above.

Explanation:

When light reflects from a surface, the frequency, wavelength, and speed do not change. They remain the same.

6 0

2 years ago

If a bust starts to move and its velocity becomes 90 km after 8 seconds . calculate its acceleration answer it quick please

kherson [118]

Answer:

a = 3.125 [m/s^2]

Explanation:

In order to solve this problem, we must use the following equation of kinematics. But first, we have to convert the speed of 90 [km/h] to meters per second.

$90\frac{km}{h}*\frac{1000m}{1km}*\frac{1h}{3600s} \\= 25 \frac{m}{s}$

$v_{f} =v_{i} + (a*t)$

where:

Vf = final velocity = 25 [m/s]

Vi = initial velocity = 0

a = acceleration [m/s^2]

t = time = 8 [s]

The initial speed is zero as the bus starts to koverse from rest. The positive sign of the equation means that the bus increases its speed.

25 = 0 + a*8

a = 3.125 [m/s^2]

3 0

3 years ago