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Category: Electric Current and Circuits

Radio-Karneston-broadcasts-at-891kHz-A-student-made-a-radio-to-receive-the-station-using-an-L-C-oscillator-circuit-with-an-inductor-of-fixed-inductance-0-16mH-and-a-variable-capacitor-At-what-value-

Question Number 41121 by Necxx last updated on 02/Aug/18 $${Radio}\:{Karneston}\:{broadcasts}\:{at}\:\mathrm{891}{kHz}. \\ $$$${A}\:{student}\:{made}\:{a}\:{radio}\:{to}\:{receive} \\ $$$${the}\:{station}\:{using}\:{an}\:{L}-{C}\:{oscillator} \\ $$$${circuit}\:{with}\:{an}\:{inductor}\:{of}\:{fixed} \\ $$$${inductance},\mathrm{0}.\mathrm{16}{mH}\:{and}\:{a}\:{variable}\circledast \\ $$$${capacitor}.{At}\:{what}\:{value}\:{of} \\ $$$${capacitance}\:{will}\:{the}\:{student}\:{receive} \\ $$$${the}\:{station}? \\…

Question-106508

Question Number 106508 by Learner-123 last updated on 05/Aug/20 Commented by JDamian last updated on 05/Aug/20 The 5 A current flows through the 30 Ohm resistor. Then the voltage at P is the sum of the voltage at that resistor (5×30=150) and the 5V from the DC voltage source. Commented by Learner-123 last updated on 05/Aug/20 $${Could}\:{someone}\:{help}\:{me}\:{in}\:{finding}…

P-i-2-R-then-how-dP-P-2-dI-I-Similarly-P-V-2-R-then-how-dP-P-2-dV-V-

Question Number 36707 by rahul 19 last updated on 04/Jun/18 $$\mathrm{P}=\mathrm{i}^{\mathrm{2}} \mathrm{R}\:\mathrm{then}\:\mathrm{how}\:\frac{\mathrm{dP}}{\mathrm{P}}\:=\:\mathrm{2}\:\frac{\mathrm{dI}}{\mathrm{I}}\:? \\ $$$$\mathrm{Similarly}\:\mathrm{P}=\:\frac{\mathrm{V}^{\mathrm{2}} }{\mathrm{R}}\:\mathrm{then}\:\mathrm{how}\:\frac{\mathrm{dP}}{\mathrm{P}}=\mathrm{2}\frac{\mathrm{dV}}{\mathrm{V}}? \\ $$ Commented by rahul 19 last updated on 04/Jun/18…