Find the hot resistance of a lightbulb rated 80 W. 120 V. Calculate current i in

Question

Find the hot resistance of a lightbulb rated 80 W. 120 V. Calculate current i in Fig. 2.1 when the switch is in position 1. Find the current when the switch is in position 2. Find i1, i2, and i3 in Fig. 2.2 In the circuit in Fig. 2.3. obtain v1,v2, and v3. Calculate v and i x in the circuit of Fig. 2.4 Find I and V ab in the circuit of Fig. 2.5. Determine i0 in the circuit of Fig. 2.6. Find vx in the circuit of Fig. 2.7. Find V0 in the circuit in Fig. 2.8 and the power dissipated by the controlled source.

Explanation / Answer

1) P = V^2/R means R= V^2/P =120^2/80 =180 ohms 2) a) 15/80 =0.1875 a b) 15/75 =0.2 A 3) 5A, 6A, 7A 4)10V, 20V, 15V 5)4.5 V, 0.5 A 6)3A, 21V 7) 3A 8)3V 9)70/13 V

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