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Question
A 664-turn circular-loop coil 11.2 cm in diameter is initially aligned so that its axis is parallel to Earth's magnetic field. In 3.77 ms the coil is flipped so that its axis is perpendicular to Earth's magnetic field.
If the average voltage of 0.214 V is thereby induced in the coil, what is value of Earth's magnetic field at that location?
Answer in units of µT
When coil of a motor is rotating at highest speed, the current in the windings is 6.1 A. When motor is first turned on, the current in the winding is 13 A and the voltageis 114 V.
Find out the resistance of the windings.
Answer in units of Ω
Find out the back emf of the coil at maximum speed.
Answer in units of V
A 340 g air track cart traveling at 1.25 m/s collides elastically with the 300 g cart traveling in the opposite direction at 1.33m/s. What is the speed of the 300g cart after collision.
The hole on a level, elevated golf green is a horizontal distance of 125 m from the tee and at an elevation of released 10.4 m above the tee, What was the initial speed of the ball
A 190 rad dose of radiation is administered to a patient in an effort to combat a cancerous growth. Calculate the amount of energy delivered per unit mass
Two people, one at each end of a uniform beam that weighs 400N hold the beam at an angle of 25 degrees to the horizontal
A picture window has dimensions of 1.40 m×2.50m and is made of glass 5.50mm thick. At what rate is heat being lost through the window by conduction
A contact lens is made of plastic with an index of refraction of 1.58. The lens has an outer radius of curvature of +1.99 cm, What is the focal length of the lens
Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.100 N. Using this information, find the initial charge on each sphere, q1 and ..
Suppose a diving board with no one on it bounces up and down in a simple harmonic motion with a frequency of 5.00 Hz. What is the frequency of the simple harmonic motion
Antimony (atomic number 51) is composed of two principal isotopes, antimony-121, which has a mass of 120.904 atomic mass units, What is the atomic mass of natural antimony?
we have a parallel plate capacitor separation of 0.2mm capacitance C0= 21 nF we fill it with 20g of silicone oil & density 520 kg/m^3, find the max charge on the plate before dielectric breakdown
How much charge passes during the starter motor
An electron moves in the xy plane with a speed of 3.75 x 106 m / s at an angle 600 with the x-axis 300 and the axis. A magnetic field of 0.85T is in the positive direction of axis y. Find the magnetic force on the electron.
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