PHYS 2426 Engineering Physics II Problem 27.1 To get full credit: 1. Draw a diagram. 2. Start from a basic equation. 3. Show all the steps leading to the answer. 4. Give the SI units to all your answers. 5. Keep three significant figures in all your final answers. 1. Three resistors, R1 = 30.0 0, R2 = 50.0 0 and R3 = 20.0 0 are connected as shown in the circuit in the figure. (a) Calculate the equivalent resistance. (b) A 12.0 V car battery is connected between the terminals "a" and "b". Calculate the electric current provided by the battery. (c) Calculate the electric current in each resistor. (d) Calculate the battery power. (e) If the battery remains connected to the circuit for one minute, calculate the en- ergy delivered by the battery to the circuit and the energy dissipated (converted to heat) in each resistor. Is energy provided equal to energy dissipated? R = 3052 R x 50 52 RQ = 20.52PHYS 2426 Engineering Physics II Problem 27.2 1. An 800 W toaster, a 1200 W microwave oven and 100 W light bulb are connected across a 120 V power source (the power line). The circuit diagram shows the appli- ances represented as resistors. (a) Which way are household appliances connected, series or parallel? (b) Calculate the current drawn by each appliance and the total current provided by the source. (c) Calculate the resistance of each appliance and the equivalent resistance of the circuit. (d) If for each day, the light bulb is "on" for 8 hours, the toaster and the microwave oven are used for 0.500 hour each, calculate the electrical energy consumption in one month (30 days). Give your answer in Joules and kilo Watthours (kWh). If the price of 1.00kWh is $0.10, calculate the monthly cost of this amount of energy.2 = 120V m 80OW 120ow 100 W