Related Questions

The r.m.s. value of alternating current is given by steady (D.C.) current which when flowing through a given circuit for a given time produces
A The more heat than produced by A.C. when flowing through the same circuit
B The same heat as produced by A.C. when flowing through the same circuit
C The less heat than produced by A.flowing through the same circuit
D None of the above
What is the name of the device used to convert alternating current into direct current ?
A Ammeter
B Galvanometer
C Rectifier
D Transformer
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
A 50 units
B 60 units
C 70 units
D 80 units
একটি AC (Alternating current) প্রবাহের সমীকরণ 1=50 sin (628t) হলে প্রবাহের কম্পাংক কত ?
A 1 H z
B 50 Hz
C 100 Hz
D 150 Hz
When measuring AC (Alternating Current) with a multimeter, it is important to maintain the proper polarity.
A True
B FALSE
C MEM /C
D SYS:
E None of the above
In the case of an unsymmetrical alternating current the average value must always be taken over
A Unsymmetrical part of the wave form
B The quarter cycle
C The half cycle
D The whole cycle
When an alternating current passes through an ohmic resistance the electrical power converted into heat is
A Apparent power
B True power
C Reactive power
D None of the above
The frequency of an alternating current is
A The speed with which the alternator runs
B The number of cycles generated in one minute
C The number of waves passing through a point in one second
D The number of electrons passing through a point in one second
A cable carrying alternating current has
A Hysteresis losses only
B Hysteresis and leakage losses only
C Hysteresis, leakage and copper losses only
D Hysteresis, leakage, copper and friction losses
If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because
A varying voltage produces the charging and dicharging currents
B of high peak value
C charging current can flow
D discharge current can flow

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