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What are the potentials at point a and b if 4.7

A hollow copper wire with an inner diameter of 1.1 mm and an outer diameter of 3.4 mm carries a current of 13 A. What is the current density in the wire?

Two 5.5×5.5 cm metal plates are separated by a 0.43 mm thick dielectric material with a dielectric constant of 2.9. What is the capacitance?

12.  Use the half-angle formulas to determine the exact value of sine, cosine, and tangent of 105°.    Your work for this problem must be clear and legible in your submission. No decimal answers.  Enter your answer use the √,π if needed in simplified form. sinu = [sin] cosu = [cos] tanu = [tan]

What is the internal resistance of a 8.4 V battery that produces power of 50 W when shorted with wire of negligble resistance?

The femoral artery is the large artery that carries blood to the leg. What is the resistance of a 16 cm long column of blood in a 0.9 cm diameter femoral artery? The conductivity of blood is

Two 6.1×6.1 cm metal plates are separated by a 0.71 mm thick dielectric material with a dielectric constant of 8.4. What is the capacitance?

A long, straight wire carries a current of I = 4.9 A to the left as shown below. What is the magnitude of the magnetic field created by this wire at point P which is 21 cm away from the wire as shown?

What is the internal resistance of a 4.1 V battery that produces power of 77 W when shorted with wire of negligble resistance?

A long, straight wire carries a current of I = 4.5 A to the left as shown below. What is the magnitude of the magnetic field created by this wire at point P which is 26 cm away from the wire as shown?