Field intensity: An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the signal at that point is 0.63 V/m. Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed. What is the magnetic field amplitude of the signal at that point? (c = 3.0 × 108 m/s, μ0 = 4π × 10-7 T ∙ m/A, ε0 = 8.85 × 10-12 C2/N ∙ m2)

Potential energy of point-charges: If an electron is accelerated from rest through a potential difference of 9.9 kV, what is its resulting speed? (e = 1.60 × 10-19 C, k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2, mel = 9.11 × 10-31 kg)

Power: What is the average power dissipated by a 25-Ω resistor in an LRC series ac circuit for which the power factor is equal to 0.25 and the maximum voltage of the ac source is 8.0 V?

Electromagnetic waves: The magnitude of the electric field at a point P for a certain electromagnetic wave is 570 N/C. What is the magnitude of the magnetic field for that wave at P? (c = 3.0 × 108 m/s)

Potential due to point-charges: A +4.0 μC-point charge and a -4.0-μC point charge are placed as shown in the figure. What is the potential difference, VA – VB, between points A and B? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2)

Field intensity: If a beam of electromagnetic radiation has an intensity of 120 W/m2, what is the maximum value of the electric field? (c = 3.0 × 108 m/s, μ0 = 4π × 10-7 T ∙ m/A, ε0 = 8.85 × 10-12 C2/N ∙ m2)

A 10 cm x 10 cm square is bent at a 90 angle. A uniform 4.2×10−2 T magnetic field points downward at a 45

Current: In an electroplating process, copper (ionic charge +2e, atomic weight 63.6 g/mol) is deposited using a current of 10.0 A. What mass of copper is deposited in 10.0 minutes? Avogadro’s number is 6.022 × 1023 molecules/mol and e = 1.60 × 10-19 C.

Electromagnetic waves: If the electric field and magnetic field of an electromagnetic wave are given by E = E0 sin(kx – ωt) and B = B0 sin(kx – ωt), and if the value of E0 is 51 µV/m, what is the value of B0? (c = 3.0 × 108 m/s)

A 10 cm x 10 cm square is bent at a 90 angle. A uniform 6.7×10−2 T magnetic field points downward at a 45