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- On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0°C in 120 s. (a) What was the rate of energy absorption by the spaghetti, given that its specific heat is 3.76103J/kg.C ? Assume the spaghetti is perfectly absorbing. (b) Find the average intensity of the microwaves, given that they are absorbed over a circular area 20.0 cm in diameter. (C) What is the peak electric field strength of the microwave? (d) What is its peak magnetic field strength?The potential difference V(t) between parallel plates shown above is instantaneously increasing at a rate of 107V/s. What is the displacement current between the plates if the separation of the plates is 1.00 cm and they have an area of 0.200m2?10 km long copper conductor with a diameter of 2 cm J=8 A/mm^2 has a current density. According to this the electric field (E) on the conductor, the drift velocity of the electrons (Vc), the magnetic field 50 cm from the wire. Calculate the area (B) and DC resistance (RCu) : (H=3,2×10³ m²/Vs, ocu-5,80×10 S/m).
- A velocity selector in a mass spectrometer uses a 0.120 T magnetic field. (a) What electric field strength (in volts per meter) is needed to select a speed of 4.50 ✕ 106 m/s? V/m (b) What is the voltage (in kilovolts) between the plates if they are separated by 1.00 cm? kVis giver by equatior differential If the electric Charge L dďQ +R dQ dE Intensity of Electric Current; OP = エ de Find PCE) if E(t) = 100 CoS (iOt), C = 16 x 10,L = 1 Ect) = 100 CoS (10t) , C = 16 x 10 L = 1 %3D %3D R R=40,(The inital charge ard inital3.30P) Determine the B field on the axis of a circular cylinderical shell. The cylinder has a Radius b, length L, and the surface current density j = Ims@. Calculate the B in the cylinder by using Ampere's Law for very long L RO, 0, 2) Jms
- Exploding Shoes. The rain-soaked shoes of a person may explode if ground current fromnearby lightning vaporizes the water. The sudden conversion of water to water vapor causesa dramatic expansion that can rip apart shoes. Water has a density of 1000 kg/m^3 and requires2256 kJ/kg to be vaporized. If a horizontal current lasts 2.00 ms and encounters water withresistivity 150 Ω·m, length 12 cm, and vertical cross-sectional area 15×10^−5 m^2, what average current is required to vaporize the water?A 0.230-A current is charging a capacitor that has circular plates 11.1 cm in radius. The plate separation is 4.00 mm. (a) What is the time rate of increase of electric field between the plates? V/(m.s) (b) What is the magnetic field between the plates 5.00 cm from the center?In Ampère's law in its differential form, V ×B = µoJ replace the total current density J with the sum of the free current (Jf) and bound (Jb) densities. From manipulates, obtain the expression for the wwwm auxiliary field H, 1 Ħ =-B – M Ho Also, explain the physical meaning of this field.
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