Homework Answers
The resistance of the filament of the electric bulb increases when temperature increases. Current of the filament will decreases when temperature increases or when it becomes hot.
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2. The resistance of the l'11 sment of the electric bulb increases when it becomes...
The bulb filament is a resistance in the form of a thin piece of wire. The...
The bulb filament is a resistance in the form of a thin piece of wire. The wire becomes hot enough to emit light due to the current in it. A flashlight uses two batteries of 1.5 v each to provide a current of 0.40 A in the filament. Determine the resistance of the bright filament.
The filament of a light bulb is a resistance in the form of a thin piece...
The filament of a light bulb is a resistance in the form of a thin piece of wire.The wire becomes hot enough to give off light due to the current in it.A flashlight uses two batteries 1.5 v each to provide a stream of 0.40 in the strand. Determine the bright filament resistance.
A tungsten filament in an incandescent bulb has the following properties when the bulb has been...
A tungsten filament in an incandescent bulb has the following properties when the bulb has been connected to an ideal 1.5 volt battery for a long time: • temperature = 2800 K • resistivity at this temperature = 8.47E-7 Ωm • length = 0.30 m • diameter = 0.52 mm You may assume that any other parts of the bulb and the wires have no resistance. 1. Determine the resistance of the tungsten filament. 2. Determine the current through the tungsten filament....
5. When a light bulb is connected to a 4.5 V battery, a current of 0.16A...
5. When a light bulb is connected to a 4.5 V battery, a current of 0.16A passes through the bulb filament. What is the resistance of the filament? What is the power delivered to the light bulb? (5pts)
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the...
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
4) a) What is the current in a 75 W the filament of a light bulb...
4) a) What is the current in a 75 W the filament of a light bulb when you tum the light on? Electric sockets supply electricity at about 110 V b) How much charge does flow through the filament during 10.0 second? c) How many electrons pass during this time? d) What is the resistance of the filament? e) What is your monthly payment if you keep the light bulb on for 4 hours every day? The cost of each...
Part A : The resistance of an electric heater is 90 Ω when connected to 120...
Part A : The resistance of an electric heater is 90 Ω when connected to 120 V. How much energy does it use during 15 min of operation? (answer in J) Part B : The lightbulb used in a computer projector has a resistance of 71 Ω. What is the current through the bulb when it is operating on 120 V? ( answer in A )
(a) How much current flows in a 100 watt bulb when lit? Assume 120 volts and...
(a) How much current flows in a 100 watt bulb when lit? Assume 120 volts and assume DC voltage. (b) What is the resistance of a 100 watt light bulb when lit? Assume 120 volts and a tungsten filament temperature of 1200° C when lit. (c) How much current flow in the bulb when it is first turned on and the temperature of the filament is 20° C? Use α-5.36 x 10-3 Co.1 for tungsten.
The resistances of most substances increase when they are heated. A bulb for a flashlight using...
The resistances of most substances increase when they are heated. A bulb for a flashlight using 3.0 V has a resistance of 2.0 ohms when cold and 24 ohms when hot. Calculate the current (Amps) through the bulb when (a) cold and (b) hot. Claculate the power consumed when (c) cold and (d) hot.
5. When a light bulb is connected to a 4.5 V battery, a current of 0.16A passes through the bulb filament. What is the resistance of the filament? What is the power delivered to the light bulb? (5pts)
b. Does the resistance of the electric light bulb increase, decrease or remain constant as the power, I*V, is increased? Consult your data table. Does the temperature of the light bulb filament increase, decrease or remain constant as c. the power, IV, to the bulb is increased? (Hint: Associate a higher electrical power with 3. Does the diode conduct symmetrically when the current flows in the forward (positive 4. Why is it that we always connect a voltmeter in parallel...
4) a) What is the current in a 75 W the filament of a light bulb when you tum the light on? Electric sockets supply electricity at about 110 V b) How much charge does flow through the filament during 10.0 second? c) How many electrons pass during this time? d) What is the resistance of the filament? e) What is your monthly payment if you keep the light bulb on for 4 hours every day? The cost of each...
(a) How much current flows in a 100 watt bulb when lit? Assume 120 volts and assume DC voltage. (b) What is the resistance of a 100 watt light bulb when lit? Assume 120 volts and a tungsten filament temperature of 1200° C when lit. (c) How much current flow in the bulb when it is first turned on and the temperature of the filament is 20° C? Use α-5.36 x 10-3 Co.1 for tungsten.
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