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1. A lightning bolt strikes an airplane with 30 kA for 2 ms. How many coulombs of charge are deposited on the Plane?
2. A 1.8- kW electric heater takes 15 moin to boil a quantity of water. If this is done once a day and power costs 10 cents/kWh. What is the cost of its operation for 30 days?
3. A utility company charges 8.5 cents/kWh. If a consumer operates a 40-W light bulb continuously for one day, how much is the consumer charged?
4. A 1.2-kW toaster takes roughly 4 minutes to heat four slices of bread. Find the cost of operating the toaster once per day for 1 month(30 days). Assume energy costs 9 cents/kWh.
Pulse Generator, Using one 555 timer, design a pulse generator that will have the following continuously variable ranges
Determine the largest permissible value of P for the beam and loading shown, knowing that the allowable normal stress is +8 ksi in tension and -18 ksi in compression.
Calculate the extraction efficiency (in percentage) of flat - surface LED without any encapsulation (emits directly into the air). The LED is fabricated from material with the refractive index n = 2.3.
Determine ideal impulse response using inverse discrete-time Fourier transform. An ideal low-pass filter is described in the frequency-domain by
A 25KW, 250V dc shunt generator has armature and field resistances of 0.06 ohm and 100 ohm respectively, determine the total armature power developed when working (1) as a generator delivering 25KW output and (2) as a motor taking 25KW
An 11000V/230 V. 50 Hz, single phase, core type transformer has a core section 25cm X 25cm. Allowing for a space factor of 0.9, find the suitable number of primary and secondary turns, if the flux density is not to exceed 1.2 T.
Draw a circuit that operates as follows- When power is applied to the circuit and before any push buttons are pressed all relays are de-energised and lamps extinguished.
If 3.0 V are across the resistor, compute: a) the current in the inductor b) the inductive reactance XL c) the voltage across the inductor Vl d) the source voltage Vs e) the phase angle between Vr and Vs
Two charged concentric spherical shells have radii 10.0cm and 15.0cm. The charge on the inner shell is 4.00X10^-8C, and that on the outer shell is 2.00X10^-8C. Find the electric field (a) at r = 12.0cm and (b) at r = 20.0cm.
A. What is the reflection coefficient of the load B. If a quarter-wave transformer is inserted between the transmission line and the load, what shall be the characteristic impedance Z0 of this quarter-wave transformer in order to realize an impeda..
An unknown resistance Rx is connected in series with a 100 ohm resistor and a 120 V power supply. There are 2 values of Rx that will cause this resistance to dissipate 25 Watts of power. Find these 2 resitance values.
Let the probability of a bit error be p, and the length of a data frame be N. Find the probability of 1, 2, 3, and 4 bit errors occurring in the frame. a) Tabulate the results for N = 1000, 10000, and 100000 bits, for p = 10-6, 10-8, and 10-14
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