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ÿþ22.11.2010 ELK - Basics of electronics - Test 1 name: .................................................. index number: .................................................. 1. Transform schematic diagram to find the value of equivalent resistance Re 2. Impedance divider R L is used as high-pass filter. Draw the schematic diagram of that filter, find transmittance (transform function) and formula describing cut-off frequency. For R = 1k&! and L = 100mH calculate that frequency. Draw amplitude characteristic, describe axes and state cut-off frequency. Is it lower or upper frequency ? 3. For the following circuit: find currents in all branches. Any method can be chosen. 4. For given one-port rad find impedance knowing, that C1 = 10nF , C2 = 20nF , R = 10k&! and É = 10k . s Find the phase shift between voltage and current.

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