1. Find the resistance in ohms of a light bulb that produces 60 W of power...
1. Find the resistance in ohms of a light bulb that produces 60
W of power when connected to 120 V household current. (5 pts)
2. Indicate if the statements below are true or false:
(a) AC currents are changing, and the voltage is constant
(b) DC currents are constant, and the voltage is constant
(c) The time dependence of AC current and voltage follows a “sin” wave with frequency 60 Hz
(d) When several light bulbs are arranged in a series combination, if one bulb burns out then the other lights stay on.
(e) When several light bulbs are arranged in a parallel
combination, if one bulb burns out then the other lights stay
on.
Homework Answers
Ques 1:
Resistance , R = V2/P = ( 60* 60) / 120 = 30 ohms (ans)
Ques 2:
(a) false
(b) true
(c)true
(d) false
(e) true
Add Answer to:
1. Find the resistance in ohms of a light bulb that produces 60
W of power...
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1. The filament of a standard 100-W light bulb has a resistance of about 100 ohms. For this laboratory the glass of the light bulb is unfrosted, so that the filament can be viewed directly. The light bulb is connected to a variable AC voltage source (a Variac), which can deliver up to 140 volts AC. When the voltage is low, about 20 volts, the filament is a dull, red color. When the voltage is high, 100 V, how does...
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i. Peak Voltage out of the Diode Bridge:
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1. Write an equation that describes voltage supplied by a wall outlet. (f = 60 Hz,...
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Table 2) increasing or decreasing with increasing the number of
bulbs in Fig. 5 (a) to Fig. 5 (d)? Why
2. Is there any correlation between the current through each
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4. The maximum output current from the DC power supply #1 is 2
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For the block diagram below, find the following if Vsecondary =
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i. Peak Voltage out of the Diode Bridge:
ii. DC Voltage out of the Diode Bridge with no filter
capacitor:
iii. DC Load Current
On/off ...Switch T2 DI UE J? .. . uSE Vltage AC input PlugTransforrmerBridgeCapacitorRegutator Fuse StepDownDiodeFilter
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