PHYS_2&12_Lab 4_Lab Sheets

A battery with E = 39 V and negligible internal resistance is connected to a voltage conductor as shown in the figure.R1=220 R2=68  a) What is the voltage U if no external load is connected? ____________ b) What is the current between A and B if these connections are short-circuited.____________ c) What is U if a load with a resistance of 68 is connected between A and B?____________ d) What is the power of the circuit if a load with a resistance of 68 Ω is connected between A and B? ____________

Determine the current, voltage and power dissipated by each of the 6 resisters in the following circuit: R47:     V:_______   I:_______   P:_______ R16:    V:_______   I:_______   P:_______ R5:     V:_______   I:_______   P:_______ R40:    V:_______   I:_______   P:_______ R22:    V:_______   I:_______   P:_______ R2 :     V:_______   I:_______   P:_______

In the figure, the ideal batteries have emfs ℰ1 = 25.0 V and ℰ2 = 0.500ℰ1, and the resistances are each 2.14 Ω. (a) What is the current in resistor 2? ______________A(b) What is the current in resistor 3? ______________A (please show the units when working through the problem so that I can follow it easier)

Suppose the current in this circuit is I = -35 A. The voltage drop across each circuit element is as given in the table below. From this information, determine, for each of these circuit elements, (i) whether an active or passive sign convention is being used for that element, (ii) whether that element is absorbing or producing a net (positive) amount of electrical power. In each answer box within the table below, type the correct choice from among the bold-faced words above. - A A B C A + с B + V₂ Circuit element Voltage drop Sign convention? Absorbing or producing net electrical power? -5 V -6 V 1 V -

In the figure below, R1 = 175 Ω, R2 = 55 Ω, and the ideal batteries have emfs ℰ1 = 8.0 V, ℰ2 = 5.5 V, ℰ3 = 2.0 V. (a) Find the current in resistor 1. ______________A(b) Find the current in resistor 2. ______________A(c) Find the potential difference between points a and b. ______________V (please show the units when working through the problem so that I can follow it easier)

Ohm's Law states that the electric current flowing though a ________ is directly proportional to the ________. Select one: a. closed circuit --- total resistance b. closed circuit --- switch resistance c. open circuit --- supply voltage d. closed circuit --- supply voltage

Please answer in typing format

1. A14/2 type copper used for a general lighting branch circuit.                                                Ampacity:______________              Maximum Fuse or Circuit Breakers Sizes:________________      2.Three 8 AWG copper conductors with THHN insulation Installed in garage in electrical metallic tubing (EMT). The ambient temperature in the garage can reach as high as 110'F. All termination points for this circuit are rated 60'C.                            Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________ 3.Four 4 AWG copper conductor with THWN insulation imstalled in EMT in a basement. All termination points are rated at 60'C.                                 Ampacity:______________                  Maximum Fuse or Circuit Breakers Sizes:________________  4. An 8/3 Type UF copper cable installed underground from a house to a detached garage to feed a 120/240-volt subpanel. All termination points are rated at 60'C.…

12. Which Insulators can be used for both horizontal and vertical positioning? A. SUSPENSION TYPE INSULATORS B. SHACKLE TYPE INSULATORS C. PIN TYPE INSULATORS D. POST TYPE INSULATORS

A one meter rod 2 cm diameter is drawn until its resistance is 100 times the initialresistance. Its length afterward is _________.

18. True or False: Electrons have a positive charge 19. If divide voltage by amperage, your result will be in ______________. 20. The rubber / plastic coating on electrical wire is called ______________.

Electrical plants Define the terms "Main column ." " Line ." " Protection earth " and " Operating earth