Full - Elektroteknika 1 Ushtrime

Problem: A coil with ( R = 10\Omega ) and ( L = 0.1H ) is connected to a ( 50Hz, 230V ) supply. Find: a) Inductive reactance ( X_L ) b) Impedance ( Z ) c) Current ( I ) d) Phase angle ( \phi )

Solution:

You will often face exercises asking for the "Total Resistance" ($R_total$) of a circuit. elektroteknika 1 ushtrime full

Ushtrimi 3: Për të njëjtin qark si më sipër, përdorni rrymat e sytheve ( I_a ) dhe ( I_b ).

Zgjidhja:

Problem: Find ( V_out ) if a circuit has a current-dependent voltage source ( 2I_x ) where ( I_x = 0.5A ) and a resistor ( 4\Omega ) in series.

Solution: [ V_source = 2 \times I_x = 2 \times 0.5 = 1V ] Then ( V_out = V_source ) across the resistor? Actually if ( 4\Omega ) is in series, same current ( I_x ) flows through it: [ V_out = I_x \cdot 4\Omega = 0.5 \cdot 4 = 2V ] But the dependent source adds voltage. Need a full loop: Loop equation: ( -2I_x + V_out = 0 ) (if only resistor and source) → ( V_out = 2I_x = 1V ) ✅ Answer depends on topology. Typical answer: ( V_out = 1V ) Problem: A coil with ( R = 10\Omega ) and ( L = 0

Used when a circuit has multiple sources (batteries/current sources).