A solenoid of length 2.50 cm and radius 0.750 cm has 33 turns. If the wire of the solenoid has 1.25 amps of current, what is the magnitude of the magnetic field inside the solenoid? magnitude of the magnetic field: 2.07 x10 T Ignoring the weak magnetic field outside the solenoid, find the magnetic energy density inside the solenoid. niagnetic energy density: 1.70 J/m3 What is the total magnetic energy inside the solenoid? total magnetic energy: 3.19 x10-6 J Incorrect

A small circular coil of 20 loops of wire having a radius of 1 cm is at rest in the X-y plane (so the normal to the loop points in the +z-direction). A uniform magnetic field of 0.5 T is turned on in the +x-direction. What is the magnetic flux through the loop? a. 7.85 x 10 Tm² b. 1.57 x 10 4 T m² O c. 3.14 x 10 3 T m2 O d. 0 T m2

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A helicopter (see figure below) has blades of length 2.80 m; extending out from a central hub and rotating at 3.40 rev/s. If the vertical component of the Earth's magnetic field is 50.0 μT, what is the magnitude of emf induced between the blade tip and the center hub? mV Sascha Hahn/Shutterstock.com

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C 12:52 HW8_60e193652a3a1c9d2d... 2. 2 of 4 SOS Done The 5.2 m long metal rotor blades of a helicopter spin at 6.0 revolutions per second perpendicular to the earth's magnetic field of 4.7x10 T. Axis What is the magnetic flux swept out by the rotor blades in one revolution and what is the emf induced between the axis and tip of a rotor blade? 3. In a CRT electrons are accelerated from rest by a potential difference of 1.40x10'V These electrons enter a magnetic field with a strength of 2.20x102 T Assuming the electrons are traveling perpendicular to the field what id the radius of the are of the deflected electrons?

= A single-turn circular loop has a radius of 25 cm, it is placed in a magnetic field of B 3.5 T which is perpendicular to the plane of the loop, see the figure below. The loop is reshaped into a perfect square without stretching the length of the loop. It takes 0.43 s to reshape the loop. What is the magnetic flux through the loop before and after it is reshaped? B X X X X X X X X X X X X X x x The final flux, Of = 5 x X X X X X X The initial flux, ¡ = 0.0000006 X Units mWb Х Х The induced emf, Emf = 34 X Units mWb x X X X What is the magnitude of the average induced emf in the loop during the reshaping process? X Units mV хх Question Help: Message instructor Post to forum

A long solenoid has a radius of 4 cm and has 800 turns/m. If the current in the solenoid is increasing at the rate of 6 A/s, what is the magnitude of the induced electric field at a point 2.2 cm from the axis of the solenoid? a. 219.00 μν/m b. 90.00 μν/m Ο c. 66.30 μν/m d. 54.00 µV/m e. 482.16 µV/m

A 59.0 cm -long solenoid 1.35 cm in diameter is to produce a field of 0.395 mT at its center. How much current should the solenoid carry if it has 790 turns of wire?

Answer c