1. Which of the following describes series circuit? A. It is a rate of energy transfer. B. It has more than one path for current to flow. C. It has two or more loads but current flows through a single conducting path. D. It is a conducting loop in which current can transfer electrical energy from a suitable source to a useful load.

1F IF 6V 6 V 10 (A) (B) Figure 1:

4) The most basic DC circuit consists of a battery (direct current source) and a resistor connected with conducting wires. Draw such a circuit for a 10V battery and a 500 resistor. Indicate the direction of current on your diagram and find the current magnitude in this circuit.

1.a. An unintentional electrical path that's conducting current from an ungrounded conductor to a normallynoncurrent-carrying metal raceway would be defined as a groundA. conductor.B. fault.C. electrode.D. interrupter. 1.b. It's important for designers and installers to ensure that equipment ground-fault current paths have________, which will facilitate the tripping of the overcurrent protective device.A. low impedanceB. proper labelingC. high impedanceD. an equilibrium

1. A series circuit has 3 resistors of values 10, 20, and 30 Ohms and a current of 2.0 Amps. What must be the voltage supplied to the circuit? a) 50 volts b) 250 volts c) 120 volts d) 25 volts 21V , 102 50 50 2. In the above 10-Ohm resistor, what is the current reading after the power supply? a) 0.60 A b) 3.0 A ) 1.2A d) 2.4A

2. A 0.30-m-long metal bar is moving to the left at constant speed of 20 m/s perpendicular to a uniform 2.0 T magnetic field. The bar rides on parallel metal rails connected through a 6.00 resistor, so the apparatus makes a complete circuit, as shown in the figure below. Ignore the resistance of the bar and the rails.

14. A power supply providing 85 V is hooked in series to a lightbulb, using two connecting wires. The lightbulb has a resistance bulb B. of 130 N and the wires have a resistance of 15 2 each. The actual question is, how much power does the bulb use, and how much power is lost in the wires? This is broken down into steps. a. What is the equivalent resistance of the series circuit? [160 Q] b. What is the current through the circuit? [.53 A] c. What is the magnitude of the potential difference between points A and B? (What is the voltage across wire 1?) [8 V] d. What is the magnitude of the potential difference between points wire 1 wire 2 A B and C? (What is the voltage across the bulb?) [69 V – note that the voltage across the bulb is NOT the 85 V of the power supply. The sum of the voltages, 8+69+8, around the circuit, IS the voltage of the power supply.) e. How much power is used by the bulb? [36.6 W] f. How much power is lost in the one of the wires? [4.2 W] |