 # Electrical Engineering Objective Questions { Electrical And Electronic Measurement }

232. In the statement "the wattmeter commonly used for power measurement at commercial frequencies is of the 2i type. This meter consists of two coil systems, the fixed system being the X coil and moving system being coil". x, Y and Z stand respectively for

233. Two-wattmeter method is employed to measure power in a 3-phase balanced system with the current coils connected in the A and C lines. The phase sequence is ABC. If the wattmeter with its current coil in A-phase line reads zero, then the power factor of the 3-phase load will be

234. The shunt type ohmeter is NOT suitale for high resistance measurements because

235.  A galvanometer is tested shown in figure, in the circuit where E = 1.5 V, 111 = 1.0 ohm, R2 = 2500 ohm and R3 is variable. With R3 set at 450 ohm, the galvanometer deflection is 140 mm and with R3 set at 950 ohm, the galvanometer deflection is 70 mm. The resistance of the galvanometer is

236. The measurement of very low and very high frequences is invariably done using a frequency counter / timer in the

237. In the particular form of frequency meter, 1p, F capacitor is conne ted across a symmetrical square wave signal of IV peak value. If the average value of the current taken by the capacitor, after full wave rectification is measured as 2 mA, then the frequency of the signal will be

238. The meter constant of a single-phase 240 V induction wathour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10 amperes of 0.8 p.f. lagging will be

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