17. A transformer that's used with a doorbell has a fixed output of A. 1 V. B. 10 V. C. 60 V. D. 120 V
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17. A transformer that's used with a doorbell has a fixed output of
A. 1 V.
B. 10 V.
C. 60 V.
D. 120 V.
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- When an electric circuit is turned on, it take an unusually long amount of time for the current in the circuit to reach its maximum amount. This effect is most likely due to __________ . a. the number of nodes or branches in the circuit b. the temperature dependence of the total resistance in the circuit c. the excess static charge that resides on the surfaces of the wires in the circuit d. the self inductance of the wires and circuit elements e. the internal resistance of the power source2. Find the Thevenin equivalent circuit for the circuit shown. Draw it. 100SL Vs=10V 501 5002 ↑I = 100mA 100012. Consider these three circuits. 100 Hz 100 Hz 50 Hz E, 2 н E, 1 µH E. O 4 µH 1 2 3 Rank in order, from largest to smallest, the peak currents ()1 to (IL)3. Order: Explanation: lll
- III. Calculate the resistance and the peak current in a 2000W hair dryer connected to a 220V line b. What happens if it is connected to a 120V line in India? a.6. Given a DC circuit with one battery and a single resistor. If the total current in the circuit is 5.00 A and the resistance of the resistor is 3.00 Ohms then find the total power emitted by the circuit. a. zero b. 15.0 W c. 0.600 W d. 1.67 W e. 75.0 WQUESTION 20 In a DC circuit with a single resistor, a current of 13 Amperes flows through a point in the circuit. After a time of 10 minutes, which of these expressions yields how much charge has flowed through the point in this time in SI units? a. 13 divided by 10 b. 13 times 600 c. 13 times 10
- 3. Suppose that resistor A has a resistance of 15 Q. and that it exists in a circuit with a battery (B) that has an emf of 120 V. What is the approximate current in the circuit at the point just after the parallel branches rejain? A) 3 amperes 8) 4 amperes C) 8 amperes D) 40 amperes16. You see a group of small fuse holders on a DIN rail in an industrial control cabinet. The fuse holders are in groups of five and are separated by a single terminal block. What's connected to that terminal block? A. System ground B. A control signal C. The AC or DC power to the fuses D. The power supply neutral 17. Which one of the following types of raceway offers the greatest protection for the conductors in the raceway? A. Metal wireway B. EMT conduit C. Rigid conduit D. Flexible conduit 18. Class 1 conductors or cables may be run with other Class 1 conductors if they all A. are part of different machine circuits. B. have different power supplies. C. have reduced voltages on the conductors. D. have the same insulation value.9-
- 1. A plug-in transformer supplies 9.5 V to a video game system. (a) How many turns are in its secondary coil, if its input voltage is 110 V and the primary coil has 330 turns? N₁ = turns (b) What is its input current when its output is 1.15 A? p A8) Consider the DC-circuit shown below. This is an example of a circuit with circuit elements in series, and in parallel. The circuit is powered by a 12 V power source. There are a total of 4 resistive elements in this circuit. Label the circuit diagram completely showing the magnitude and direction of the total circuit current, I; the polarity of the 12V power source; the polarity of the voltage drops across each resistor; and the magnitude and direction of the current flowing through each of the resistors mounted in parallel. Also label the value of the potential, in volts, at the points a, b, c, and d, in the circuit. Does this circuit satisfy Kirchhoff's Voltage law? The point a in the circuit, is called a node in the circuit, or some refer to points like a, as a branching point in the circuit. Show all of your work. 9. 12V R= 4 R= 4 R = 21. Explain how AC and DC current are different in your own words. Give an example of when you might encounter each type of current. 2. You find that there is too much resistance in a circuit to light up your LED's when you put them in a row, so you decide to hook them up in parallel. Why do they now light up and what possible danger is there now?