Calculate the power of soldering iron with a hot resistance 4KΩ and operating voltage of 200V.
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Q2
In a common-emitter transistor amplifier, the audio signal voltage across the collector is 3 V. The resistance of collector is 3 kΩ. If the current gain is 100 and the base resistance is 2 kΩ, the voltage and power gain of the amplifier is
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Q3
A hot electric iron has a resistance of 80Ω and is used on a 200 V source. The electrical energy spent, if used for 2h is :
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Q4
The resistance in the circuit is 10 Ω. The operating voltage is fluctuating; the appliance in the circuit operates best at 4kW. What is the operating voltage?
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Q5
In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is 3kΩ. If current gain is 100 and the base resistance is 2kΩ, the voltage and power gain of the amplifier is