Physics Current Electricity Level: Misc Level
An aluminum bus bar has the dimensions 0.50 cmx 2.0 cm x 20.0 m. What is the resistance at 20% C?
Physics Current Electricity Level: Misc Level
A silver wire of diameter 1.0 mm carries a current of 150 mA. The density of conduction electrons in silver is 5.8x 1028 m-3. How long (on average) does it take for a conduction electron to move 1.0 cm along the wire?
Physics Current Electricity Level: Misc Level
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. If 3.8x1016 Ca2+ and 6.2 x 1016 CI ions per second move in opposite directions through an imaginary area between the electrodes, what is the current in the solution?
Physics Current Electricity Level: Misc Level
Rearrange the equation {current=voltage/resistance] to express resistance in terms of current and voltage. Then solve; A certain device in a 120- V circuit has a current rating of 20 A. What is the resistance of the device (How many ohms)?
Physics Current Electricity Level: Misc Level
A certain brand of hot dot cooker applies a potential difference (120V) to opposite ends of the hot dog and cooks by means of the joule heat produced. If 60 kJ is needed to cook each hot dog. what current is needed to cook four hot dogs simultaneously in 3.0 minutes?
a. 11A
b. 2.8 A
c. 8.3 A
d. 2.1 A
e. 3.6 A
Physics Current Electricity Level: Misc Level
Most telephone cables are made of copper wire of either 24 or 26 gauge.If the resistance of 24-gauge wire is 137 Q/mile and the resistance of 26- gauge wire is 220 Q/mile, what is the ratio of the diameter of 24- gauge wire to that of 26- gauge wire?
a. 1.6
b.1.3
c. 0.62
d. 0.79
e. 0.88
Physics Current Electricity Level: Misc Level
A capacitor of unknown capacitance C is charged to 100 V and then connected across an initially uncharged 60-uF capacitor. If the final potential difference across the 60-uF capacitor is 40 V, determineC.
a. 49 uF
b. 32 uF
c. 40 uF
d. 90 uF
e. 16 uF
Physics Current Electricity Level: Misc Level
If 480 C of charge pass through 4.0 Q resistor in 10 minutes, what is the potential difference across the resistor.
Physics Current Electricity Level: Misc Level
An RLC series circuit consists of a 15 uF capacitor, a 78.0 Q resistor and a 90 mH inductor.The oscillator is set for 560 Hz outputs a sinusoidal ] voltage of 105 V. Determine the:
a) current flowing in the circuit
b)voltage drop across each of the circuit elementts.
Physics Current Electricity Level: Misc Level
Suppose that you wish to fabricate a uniform wire out of 1.0 gram of copper. If the wire is to have a resistance of R 0.50 ohms, and all of the copper is to be used, what will be the length and diameter of this wire?
Physics Current Electricity Level: Misc Level
The turns ratio inside a transformer is 13:1 and is used with a 120V. If the transformer draws 0.350 A what is the voltage and current supplied from the transformer and how much power is delivered?
Physics Current Electricity Level: Misc Level
A resonant circuit in a radio receiver is tuned to a station when the inductor has a value of .200 mH and the capacitor has a value of 30.0 pF. Find frequency and wavelength sent out by the station.
Physics Current Electricity Level: Misc Level
In centain RLC circuit, the rms current is 6.0 A, rms voltage is 240 V and the current leads the voltage by 53 degrees. What is the total resistance of the circuit? Calculate the total reactance X(L)-X(C) and find the average power delivered to the circuit.
Physics Current Electricity Level: Misc Level
A 50 ohm resistor is connected in series to a 15.0 micro Farraday capacitor and a 60.0 herz, 120 v source.Find the current and value of the inductor that must be inserted in the circuit to reduce this same current to 1/2.
Physics Current Electricity Level: Misc Level
An ac voltage source has an output of delta V=150 sin 377t. Find the rms voltage output and frequency of the source.Find the voltage at t=1/120 sec. Find the maximum current in the circuit when the generator is connected to a 50.0 ohm resistor.
