What is the correct procedure to measure amperage in a DC circuit? Question options: Open the circuit and place the meter in series with an energized circuit Connect the ammeter in parallel and observe polarity Disconnect the battery and connect the meter in parallel Open the circuit and connect the meter series with a current-limiting resister How is the strength of a magnetic field sensed when measuring DC amperage? Question options: Measuring the number of lines of force in a rotating magnetic field Using a Hall Effect sensor Using an inductor Using a K-type thermocouple Which of the following test instruments is the best to measure electrical signals from multiple wires connecting to an ECU? Question options: An ammeter A voltmeter A signal tracer A break-out box Which electrical service tool is best used to locate a broken wire behind a body panel? Question options: A voltmeter A signal tracer A graphing meter An inductive-type clamp Which is the best reason for using a vehicle communication interface adapter? Question options: To obtain engine-related fault codes To enable a PC or laptop to communicate with a vehicle network To enable bidirectional communication between a PC and ABS module To actuate network-connected output devices on the vehicle
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Question 7: The strength of a magnetic field when measuring DC amperage is sensed using a Hall Effect sensor. Show more…
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question 1.) 2 current carrying wires are parallel and lie in the horizontal plane. the 2 wires repel each other with equal forces . what statement is true about the currents? a. the currents flow in the same direction b. the currents must be equal in magnitude c. the currents flow in opposite directions d. the currents must not be equal in magnitude question 2.) if currents are 1 and 5 amps, what distance in millimeters must the wires be apart to have a force of .001 Newton acting on the wire carrying 1 amp? The wires are 1 meter long. a. 3 b. 2 c. 1 d. 5 e. 4 Question 3.) what will the value of the B field be at the location of the 1 amp wire due to the 5 amp wire? answer in milli teslas. a. 4 b. 5 c. 2 d. 1 e. 3 Question 4.) what will the value of the B field be at the location of the 5 amp wire due to the 1 amp wire? answer in milli teslas. a.) .2 b.) 1 c.) .8 d.) .4 e.) .6 Question 5.) What direction will the B field due to the 1 amp current be pointing at the location of the 5 amp current? a.) perpendicular to the plane of the wires b.) in the plane of the wires and pointing in the direction of the 5 amp current c.) in the plane of the wires and pointing to 5 amp wire d.) in the planes of wires pointing to the 1 amp wire
Ravindra Y.
Question 3 This question is worth 20 marks, and is designed to test your understanding of electrical circuits (Unit 10). (a) State in your own words Kirchhoff’s laws and Ohm’s law for electrical circuits. (Answers quoted from the module material or elsewhere will receive no marks.) (4 marks) (b) The circuit shown in Figure 1 can be used to measure the resistance of a platinum resistance thermometer (PRT). AB is a uniform resistance wire of length 1.0 m and C is a sliding contact on this wire. A standard resistor R is included in the circuit. The position of C is adjusted until the voltmeter V reads zero. (i) By applying Kirchhoff’s laws to loops ADCA and BCDB, deduce an expression for the resistance of the PRT in terms of l1, l and the value of the standard resistor. (5 marks) (ii) The PRT consists of 9.0 m of wire of diameter 8.0 !! 10−2 mm. The voltmeter reads 0 V when l1 = 0.44 m. If the standard resistor, R, has a resistance of 224 ΄, what is the resistivity of platinum? Show that you have checked that the value for the resistivity and its unit are sensible. (9 marks) (c) Indicate briefly what factors might affect the precision of the measurement when using such a simple circuit to measure the resistance of the PRT. (2 marks)
Jagjit Singh C.
1.1 One millivolt is one millionth of a volt. (a) True (b) False 1.8 The voltage across a 1-kW toaster that produces a current of 10 A is: (a) 6 V (b) 400 V (c) 10 V (d) 1 V 1.9 Which of these is not an electrical quantity? (a) charge (b) time (c) voltage (d) current (e) power 1.10 The dependent source in Fig: 1.22 is: (a) voltage-controlled current source (b) voltage-controlled voltage source (c) current-controlled voltage source (d) current-controlled current source 1.2 The prefix micro stands for: (a) 10^6 (b) 10^-6 (c) 10^-5 (d) 10^13 The voltage 2,000,000 V can be expressed in powers of 10 as: (a) 2 mV (b) 2 kV (c) 2 MV (d) 2 GV 14 The charge of 2 C flowing past a given point each second is a current of 2 A. (a) True (b) False 15 The unit of current is: (a) coulomb (b) ampere (c) volt (d) joule 1.6 Voltage is measured in: (a) watts (b) amperes (c) volts (d) joules per second 1.7 A 4 A current charging dielectric material will accumulate a charge of 24 C after 6 s. (a) True (b) False Figure 1.22 For Review Question 1.10.
Sri K.
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