5 capacitors are placed in series in a circuit, with a capacitance of 2F, 4F, 10F, 16F and 20F, respectively. What is the total capacitance in the circuit? O 0.34 F O 1.04 F O 0.9625 F 1.21 F A resistor is 20.0 0 and the current is 2.3 A. What is its voltage drop? O 46.0 V O 8.70 V O 106 V 0.155 V In a series circuit, there are two resistors, R, and R2, 5 0 and 10 Q respectively, in a circuit with a 12.0 V battery. What is the voltage drop across R2? 12 V 6 V 9 V 8 VA capacitor has a plate area of 40 cm- and a plate separation of 2.0 x 10 m. If the dielectric constant * = 4.0, what is the capacitance? 8.0 x 10# F 3.0 x 107 F 7.1 x 10 7F 4.4 x 10 20 F Dielectrics can help increase capacitance because: Dipolar molecules in the material align with the existing electric field. Dipolar molecules in the material align perpendicular to the existing electric field. None of these reasons are correct. Dipolar molecules in the material align opposing the existing electric field. Which of these devices are not sources of EMF? O Resistors O Generators Batteries CapacitorsAccording to Kirchoff's First Law, what can be said, specifically, about the currents that meet at point A, and about the currents that meet at point B? 4 B A N R2 R 3 R1 +Describe how voltage, current and resistance behave in a parallel circuit.What is an insulator? Give a practical example of an insulator, and its purpose.What is the resistivity of the metal used to make a 1010 Q resistor that is a cylinder 1.00 mm in radius and 10.0 mm long? 0.317 0m 0.634 0m 0.259 0m 3.17 0m If you are given a certain material to make a cylindrical resistor, how will the resistance change if you make the resistor longer? How will the resistance change if you increase the diameter of the cylinder?Which of the following are reasons to use an insulator? I. To protect wires from touching each other and causing a short circuit. Il. To allow the maximum current to flow in a circuit. Ill. To protect humans from electric shock. Ill only I and Ill only I only I, II and IllV = 12 V + R J R 2 R3 In the circuit shown, if R1 = 1.0 0, R2 = 20 0, and Rg = 300 0, what is the current, I, flowing back to the battery? 5.2 A 12.0 A 6.3 A 12.6 AThese devices store charge and voltage. Resistors Inductors Transformers Capacitors A 15 0 wire is connected to a 3.0 V battery. What is the current that flows through the wire? D 0.20 amps 45 amps 20 amps 5.0 amps Describe how a capacitor is constructed and the purpose of a capacitor.. These materials allow current to ow under certain circumstances, and act like insulators under other circumstances, which makes them useful as switches in modern electronics. 3 Superconductors :) Insulators :) Conductors D Semiconductors .In a series circuit there are 1? light bulbs, each providing 'I ohm of resistance. What isthe total resistance? . Which otthe following characteristics are true about a series circuit? |. The current that goes through each resistor is the same. II. The drop in the voltage across each resistor is proportional to the resistance of that resistor. Ill. The current in the circuit is equal to the sum of the currents owing in each part otthe circuit. How many electrons pass by a point every second if a 0.400-amp current is flowing? (e = -1.602 x 10-19 c) 2.50 x 1018 e 6.40 x 10-20 e 1.25 x 1019 e 1.60 x 10-18 e