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otez555 [7]
3 years ago
15

A coil of area 0.320 m2 is rotating at 100 rev/s with the axis of rotation perpendicular to a 0.430 T magnetic field. If the coi

l has 700 turns, what is the maximum emf generated in it
Physics
1 answer:
weqwewe [10]3 years ago
8 0

Answer:

The maximum  emf generated in the coil is 60527.49 V

Explanation:

Given;

area of coil, A = 0.320 m²

angular frequency, f = 100 rev/s

magnetic field, B = 0.43 T

number of turns, N = 700 turns

The maximum emf generated in the coil is calculated as,

E = NBAω

where;

ω is the angular speed = 2πf

E = NBA(2πf)

Substitute in the given values and solve for E

E = 700 x 0.43 x 0.32 x 2π x 100

E = 60527.49 V

Therefore, the maximum  emf generated in the coil is 60527.49 V

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Two blocks are attached to opposite ends of a massless rope that goes over a massless, frictionless, stationary pulley. One of t
Marysya12 [62]

Answer:

<h2>1/7 kg</h2>

Explanation:

Find the diagram attached for better understanding of the question.

Given the mass of one of the blocks to be 1.0kg and accelerates downward at 3/4g.

g = acceleration due to gravity.

Let the block accelerating downward be M, mass of the other body be 'm' and the acceleration of the body M be 'a'.

M = 1.0 kg and a = 3.4g

According to newton's second law; \sum fy = ma_y

For body of mass m;

T - mg = ma ... (1)

For body of mass M;

Mg - T = Ma ... (2)

Adding equation 1 ad 2;

+Mg -mg = ma + Ma

Ma-Mg = -mg-ma

M(a-g) = -m(a+g)

Substituting M = 1.0 kg and a = 3/4g into the resulting equation;

3/4 g-g = -m(3/4 g+g)

3/4 g-g = -m(7/4 g)

-g/4 = -m(7/4 g)

1/4 = 7m/4

28m = 4

m = 1/7 kg

Therefore the mass of the other box is 1/7 kg

3 0
2 years ago
A raindrop has a mass of 5.4 × 10-7 kg and is falling near the surface of the earth. Calculate the magnitude of the gravitationa
Xelga [282]

Answer

given,

mass of raindrop = 5.4 × 10⁻⁷ kg

acceleration due to gravity = 9.8 m/s²

a) magnitude of gravitational force on the rain drop

   Force on the rain drop = m g

   Force on the rain drop = 5.4 × 10⁻⁷ x  9.8

                                          = 5.292 x 10⁻⁶ N

Hence, force on raindrop by earth is equal to 5.292 x 10⁻⁶ N

b) by newtons third law

    Force by the earth on the raindrop will be opposite to the force by raindrop on earth.

Force on earth by raindrop = - 5.292 x 10⁻⁶ N

  negative sign represent that force is acting in the opposite direction.

     

4 0
2 years ago
Read 2 more answers
The highest recorded climatic temperature in Europe is 321 K in Athens, Greece.
stealth61 [152]

For the temperature 321 K, the temperature is 118.13 degree Fahrenheit.

<u>Explanation:</u>

                     degree Fahrenheit = (K - 273.15) * (9/5) + 32

Fahrenheit is a thermodynamic temperature scale, where the freezing point of water is 32 degree Fahrenheit. Based upon the definitions of the Centigrade scale and the experimental evidence, the absolute zero is -273.15 degree Celsius.

                    degree Fahrenheit of 321 K = (321 - 273.15) * (1.8) + 32

                                                                   = 118.13 degree Fahrenheit.

7 0
2 years ago
A hot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0
iren [92.7K]

Answer:

Y = 40.94m

Explanation:

The initial speed of the sandbag is the same as the balloon and so is its position, so:

Y = Yo + Vo*t-\frac{g*t^2}{2}

Replacing these values:

Yo = 40m     Vo = 5m/s     g = 9.81m/s^2     t = 0.25s

We get the position of the sandbag:

Y = 40+5*(0.25)-\frac{9.81*(0.25)^2}{2}

Y = 40.94m

8 0
3 years ago
A pulse traveled the length of a stretched spring.
aksik [14]

Answer: The correct answer is energy only.

Explanation:

Wave is a disturbance which carries energy from one particle to another particle. It is a continuous disturbance.

Pulse is a single disturbance. It is non repeating single bump. It carries energy only. For example, a person is holding one end of the rope. He is moving that end. The pulse will create through the rope.

A pulse travels the length of a stretched spring. The pulse transfers the energy only.

Therefore, the correct option is (1).

8 0
3 years ago
Read 2 more answers
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