251. If the transmission parameters of the given networks are A = C = 1, B = 2 and D = 3, then the value of Zm is
252. In figure, the current through 10 V battery is
253. The switch in figure is initially closed. At t = 0 the switch is opened. At t = 0+, the current through R is
254. The ABCD parameters of ideal n : 1 transformer shown in the figure are . The value of X will be
255. If , the network has
256. The power dissipated in 4 Ω resistance in figure is
257. The total inductance of two coils is 60 mH in series aiding connection and 40 mH in series opposing connection. The mutual inductance between coils is
258. The transfer function of an R-L-C circuit given by The Quality factor (Q-factor) of this circuit is
259. An RC circuit initially at rest has a step signal. The response V(t) across C is V(t) = 1 - e-at, If now there is an initial voltage on C of 2 volts for the same step signal, V(t) is now
260. In the network of the figure is the maximum power is delivered to RL if its value is
261. Which of the following beliefs doesn’t belong to Mahavira’s Triratna?
262. A series circuit having R = 3 Ω and L = 2 H is excited by a 10 V battery. At t = 0+, di/dt is
263. Three resistances of 15 Ω, 10 Ω and 3 Ω are connected in parallel. The overall resistance is
264. In figure, the switch is closed at t = 0. At t = 0+ The value of current supplied by battery is
265. In the circuit shown in the figure the power dissipated in 30 Ω resistor will be maximum if the value of R is
266. Which of the following polynomials is not Hurwitz?
267. Which of the following is a chemical change?
268. A network has 10 nodes and 17 branches. The number of different node pair are
269. In a series RC circuit Z = (R2 + ω2C2)0.5.
270. If V = 20 + j20, then loge(A) A is
271. In an ac network the sum of currents entering a node is 10 ∠45°. The sum of currents leaving the node is
272. A parallel RLC network has R = 4Ω, L = 4H, C = 0.25F. Then at resonance Q =
273. A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when R is
274. Thermal expansion takes place in a?
275. In figure, the time constant for the capacitor charging is