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Electrical Engineering Objective Questions { Electrical And Electronic Measurement }

295. An ideal ammeter is connected between terminals A and B of the network shown above. The current through the ammeter is
A. 0.8 A
B. 1.6 A
C. 0 A
D. 3.2 A
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296. A star-connected pure resistive load and a delta-connected pure inductive load are connected in parallel to a 3-phase.1000 V star-connected source. Each arm of the resistive load is 1000 and each arm of the inductive load is 300 O. The total line current supplied by the source is
A. 10 j
B. 20 A
C. 1016-A
D. Ti A
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297.  In eddy current damping systems, the disc employed should be of
A. conducting and magnetic material
B. conducting but non-magnetic material
C. magnetic but non-conducting material
D. non-conducting and non-magnetic material
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298.  An instrument that measures the insulation resistance of systems using a self-provided 1000 V d.c. generator is called
B. Meggar
C. Thermocouple instrument
D. Multimeter
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299.  Which one of the following variables cannot be measured directly uy a CRO?
A. Current
B. Voltage
C. Phase difference
D. Frequency
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300.  Which methods can be used for the measurement of three phase power for an unbalanced load? Three voltmeters 1. Two vltmeters and one ammeter 2. Two wattmeters 3. One wattmeter Select the correct answer using the codes given below : Codes :
A. 1 only
B. 3 only
C. 1 and 3
D. Any one of 1, 2, 3 or 4
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301.  Wagner's Earth Devices are used for a.c. bridge circuits for
A. eliminating the effect of earth capacitances
B. eliminating the effect of inter-component capacitances
C. eliminating the effect of stray electrostatic fields
D. shielding the bridge elements
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