4. An alternating voltage of 240V,50HZ is connected across an impedance of (60-j100) Q. Determine: i. The resistance ii. The capacitance iii. The magnitude of the resistance and its phase angel iv. The current

5) Consider the DC-circuit shown below. This is an example of a parallel circuit, with a 12 V power source, and two resistive elements. Label the circuit diagram completely, showing magnitude and directions of the total circuit current, I; the polarity of the 12V power source; the polarity of the voltage drops across each resistor; and the magnitude and direction of the current flow in each of the resistors mounted in parallel. Also label the value of the potential, in volts, at the points a, b, c, and d, in the circuit; what do the values imply about the voltage drop across resistors in parallel? Show all of your work. 12 V R= 6LŹ R= 6 S2

001 An oscillating emf drives a series com- bination of a resistor and an air-gap ca- pacitor with circular plates, with emf of (240 V) sin[(800 radians/s) t], resistance of 0.8 M2, radius of 37 cm, and separation of 2 mm, as shown below. 0.8 ΜΩ 37 cm 2 mm circular plate capacitor (240 V) sin[(800 radians/s) t] Find the rms current Irms in the resis- tor. The speed of light is 2.99792 × 10 m/s, the permeability of free space is 47 x 107 T.m/A, and the permittivity of free space is 8.85419 x 10-¹² C²/N. m². Answer in units of mA. Find the rms value of the displacement cur- rent between the capacitor plates. Answer in units of mA. Find the rms value of the induced magnetic field strength between the capacitor plates at a distance of 30 cm from the center of the plates. Answer in units of T.

16.  A parallel plate capacitor used in a flash for a camera must be able to store 31.0 J of energy when connected to 312 V. (Most electronic flashes actually use a 1.50- to 6.00-V battery, but increase the effective voltage using a dc–dc inverter.) Assuming the capacitor completely discharges to produce a flash in 7.40×10−3 s, what average power is dissipated in the flashbulb during this time? _____kW