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SALEM STATE Department of Chemistry ) An ordinary fashlight uses tuo identical AA-batteries connected in series....
1. A 2.40 mH inductor is connected in series with a dc battery of negligible internal resistance, a 0.880 kΩ resistor, and an open switch. a. How long after the switch is closed will it take for the current in the circuit to reach half of its maximum value ? b. How long after the switch is closed will it take for the energy stored in the inductor to reach half of its maximum value? 2. A 4.75 μF capacitor...
e and f only please 3. A 3.0-horsepower pump is connected to a 240-V-rms AC voltage. Assume that the pump can be modeled as a simple resistive load. Note: 1 hp - 746.5 W. so 3.0 hp = 2.24 kW. P a. What is the rms current drawn by the pump? A. 7.1 A D. 18 A B. 93 A E. 21A C. 13 A P-IV 2240 2l0u b. What is the peak current drawn by the pump? A. 7.1...
1. In an AC series circuit, the current in a pure resistor differs in phase with the applied voltage by what angle? Options: a=zero, b=45°, c=90° d=180 2. In the inductor of a 60-Hz AC series circuit, the peak voltage precedes the peak current in each cycle by what time interval? Option: a)2.1 ´ 10-3 s b)4.2 ´ 10-3 s c) 8.3 ´ 10-3 s d) 1.7 ´ 10-3 s 3) What is the impedance of an AC series circuit...
7. Two light bulbs with ratings of 40 W and 100 W are plugged into sockets supplying 110 V. A) Calculate the resistance of each. Which has more resistance? The more resistance. (Notice that voltage is fixed) W bulb has B) If the 100 W bulb is operated continuously for 2 full days and electric energy costs $0.12 per kWh, how much does it cost? Convert W to kW multiply by the number of hours to get kW.h multiply by...
factor of tW 10. A loop of wire shown on the figure for problem 10 is placed in a uniform magnetic field directed into the page. The area of the loop decreases by a factor of three during a time interval of one second. 21) The magnetic flux through the loop a) increases by a factor b) increases by a of three c) decreases by a factor of three d) decreases by a f of nine factor of nine 22)...
3, A series RCL circuit contains a 222-Ω resistor, a 1.40-μF capacitor, and a 0.125-H inductor. The 360-Hz ac generator in the circuit has an rms voltage of 208 V. What is the average electric power dissipated by the circuit? A) 22 W B) 81 W C) 166 W D) 191 w E) 102 w 4. An oscillating LC circuit has a resonant frequency of 1.2 × 106 Hz. The diagram shows the system att-0s when there is no charge...
Need a help from 7 through 12 7. A square coil is in a uniform magnetic field that is perpendicular to the plane of the coil and directed into the screen, as shown. If this magnetic field begins to increase in magnitude what will the induced current in the coil be? a. directed into the screen b. zero C. clockwise d. counter-clockwise e. directed out of the screen 8. A 0.20 H inductor is located in a branch of some...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full load and has rotational losses (windage + friction) of 100 W. The stator resistance per phase is 0.2 Ohm. The results of no-load and locked-rotor tests on this motor are as follows: No-load test Locked-rotor test Line-to-line input voltage: 240 V 45 V Input active power: 1100 W 1300 W Input line current: 10 A 30 A Using the tests data, determine parameters of...
15-21 Proton 15. A proton traveling with speed venters a uniform clectric field of magnitude E, directed to the right and parallel to the plane of the page, as shown in the figure on the right. There is also a magnetic force on the proton that is in the direction opposite to that of the electric force Which of the following is a possible direction for the magnetic field? (A) Bottom of page (B) Top of page (C) To the...
ll capace, expressed in oks. They 9. The opposition offered to the non offered to the flow of a C alensis XE. 1. Inductive Reactance 2. Capacitive Reactance 3. Impedance 4. Resistance 10. The opposition offered to the The opposition offered to the flow of an alteratine curenty inductance, expressed in ons. The symbol for characteristic is XL. 1. Inductive Reactance 2. Capacitive Reactance 3. Impedance when a voltage 11. What is the basic unit of capacitance? Example: A capacitor...