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The primary coil of a certain transformer has an inductance of 3.75 H and a resistance of 36.2 olms. If the primary coil is connected to an ac source with a frquency of 38.6 Hz and a voltage of 71.2 V rms,
1) What is the rms current through the primary? Answer in units of A.
2) If the primary is connected to 64.7 V dc, what is the current through the primary? Disregard initial effects. Answer in units of A
3) In case 1, find the power dissipated in the resistance. Answer in units of W
4) In case 2, find the power dissipated in the resistance. Answer in units of W
A plane surface with area 1.5 m2 is placed in a uniform magnetic field of 6.0 T that is oriented at an angle of 20 degrees to the surface. What is the magnetic flux through this area
A sinusoidal ac voltage source in a circuit produces a maximum voltage of 12.6V and an rms current of 7.50mA. Find voltage amplitude
One recent study has shown that x rays with a wavelength of 0.0050nm can produce significant numbers of mutations in human cells. how many molecular bonds could be broken with this energy
a thin 20-kg, 5.0 m long rod is bent into a semi circle. A 0.10 kg object is placed at the center of the curvature of the semi circle. WHat is the gravitational force of the rod on the object
Two steel guitar strings have the same length. String A has a diameter of 0.59 and is under 410.0 of tension. String B has a diameter of 1.5 and is under a tension of 800.0 . Find the ratio of the wave speeds, VA/ VB, in these two strings
Two conductors having net charges of +12.0 µC and -12.0 µC have a potential difference of 12.0 V between them. Determine the capacitance of the system
suppose that we have a mixture of n2 g and o2 g of unknown composition whose total pressure is 385 torr. if all the
1. how many kg of coal are used to supply 1500 watts to heat a barn for 7 hours? the energy content of coal is 19 x 106
Tension is maintained in a string as in the figure below. The observed wave speed is 22 m/s when the suspended mass is 3.0 kg. What is the mass per unit length of the string?
Two resistors are connected in series to a battery with an emf of 12 V. The voltage across the first resistor is 2.9V and the current through the second resistor is 0.13A. Find the resistance of the second resistor
q1. a vessel whose walls are thermally insulated contains 2.00 of water and 0.550 of ice all at a temperature of 0.0.
A 2 cm cube of aluminum has a mass of 22 grams. Calculate the density of this aluminum square in grams per cubic centimeters (gm/cm 3 ).
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