a. A current of 7.4 A flows through a conductor. Calculate how much charge passes through any cross-section of the conductor in 20 s. b. The voltage v across a device and the current i through it are V(t) = 10cos2t V, i(t) = 20(1-e-0.5t) mA Calculate: (a) the total charge in the device at t=1s. (b) the power consumed by the device at t=1s.

a. A current of 7.4 A flows through a conductor. Calculate how much charge passes through any cross-section of the conductor in 20 s. b. The voltage v across a device and the current i through it are V(t) = 10cos2t V, i(t) = 20(1-e-0.5t) mA Calculate: (a) the total charge in the device at t=1s. (b) the power consumed by the device at t=1s.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

See similar textbooks

Similar questions

Identify the statement from the following when the inductance can have high value. a. All the given options O b. If the number of turns of the wire is more O c. If the length of the wire is longer O d. If the cross-sectional area is less
For the current curve shown in the figure, given that q(0)= 3.5mC. The charge q(t) at t=2ms is: 1) (A) 104 t (ms) a. 5mC. O b. 4.5mC. O c. 6mC. O d. 7.5mC. O e. 8.5mC.
b) Describe the traces you would see on an oscilloscope monitoring voltage changes across a resistance which has: - AC flowing through it - DC flowing through it You should include diagrams to support your descriptions for each trace.
A wire has a circular cross-section of radius r= 3.53 mm. The conductivity of the wire is 1x10^5 (Ohm, meter) and its lengthis 2m. The total resistance of the wire in Ohms is:O a. 0.51O b. 0.72ç. 0.26O d. 5136.07O e. 797497.60
A8-cm long wire carrying a uniformly distributed 12-µc charge is bent into a semicircle. What is the el O A) 4.2 MV B) 0.042 MV C) 0.42 MV O DI 42 MV E) 420 MV
A 4-A current charging a dielectric material will accumulate a charge of 24 C after 6 s. Select one: O a. True O b. False
An aluminum wire 7.5 m long is connected in parallel with a copper wire 6 m long. When a current of 5 A is passed through the combination it is found that the current in aluminum wire is 3 A. The diameter of aluminum wire is 1 mm. Determine the diameter of the copper wire. Resistivity of copper is 1.7 x 10 “ ohm-cm and that of aluminum is 1.724 micro-ohm-cm.
1. Differentiate DC and AC voltage sources in terms of a) value of voltage, b) direction of current produced, and c) waveform or graph of value versus time. Based on the graph in no.1a), express the capacitor voltage after one time constant, in terms of the charging voltage. Based on the graph in no.1b), express the capacitor voltage after one time constant, in terms of the initial voltage
We want to investigate how the field strength will be with air as dielectric and with steatite. A plate capacitor is placed in a 24 kV network between phase and ground. The relative permittivity of air is &=1 and for steatite &-6. The plate capacitor has area = 1m². The distance between the electrodes is 2 mm. Ep = 8.854-10-12 F/m A=1m² d=2mm a) Calculate the maximum field strength in the plate capacitor. (Answer: 9.8kV/mm) b) What is the capacitance of the capacitor if we use steatite? (Answer: C = 26.6nF)
At what temperature will intrinsic silicon become an insulator, based on the deﬁnitions in Table ? Assume that μn = 1800 cm2/V·s and μp = 700 cm2/V·s.
terminal is given by: q The total charge = 5tsin(4nt) mC. Calculate the current at t = 0.5s. entering a
I. SOLVE THE FOLLONING PROBLENS : A COPPER WIRE OF 0,3 Mm RAAUS HAS A LEN ETH OF 1. JOM- IF THE RESISTIVITY of cOpPER IS 1-7 x0 WHAT WOULD BE THE RESISTANOE OF THE WIRE? OF A 100m WIRE IS 1035 mm AND 3.7 OHMS. WHAT 2. THE DIAMETER THE REISTANCE IS IS THE CONDUCTIVITY 3. WHAT WILL BE THE VALUE OF A CAPACITOR WHEN IT HAS A CAPACITIVE REACTANCE OF 300R ANP to A 6o HZ. SUPPLY? IN FARADS IS CONNECTED 4. WHAT Is THE VALUE OF THE RESISTOR WITH THE FOLLOWING COLORS ? A. BROWN, BLACK, GOLD, REP B. BLUE YELON BROWN, SILVER PED, SILVER, BROWN, VIOET C. 5. AND t WHEN V 220V AND R= 50n WHEN I = 45 A WHEN V = 120V FIND V ANO R 80n AND AND E= 11A-