Related Questions

একটি স্টেপ আপ ট্রান্সফরমারে, গৌণ কুণ্ডলীর পাকসংখ্যা মুখ্য কুন্ডলীর পাকসংখ্যার দ্বিগুণ। যদি মূখ্য কুন্ডলীকে কোন পরিবর্তী বিদ্যুৎ লাইনের সাথে সংযুক্ত করা হয়, তাহলে মুখ্য কুণ্ডলীর তুলনায় গৌণ কুণ্ডলীতে- (In a step up transformer, the number of turns in the secondary coil is twice to that of primary coil. If you apply an alternating current in the primary coil, then in the secondary coil compared to the primary coil-)
ক তড়িৎ প্রবাহের মান দ্বিগুণ হবে (current will be doubled)
খ তড়িৎ প্রবাহের মান অর্ধেক হবে (current will be halved)
গ তড়িৎ বিভবের মান অর্ধেক হবে (voltage will be halved)
ঘ তড়িৎ প্রবাহের মান সমান থাকবে (Current will remain the same)
The number of armature parallel paths in a two-pole D.C. generator having duplex lap winding is
ক 2
খ 4
গ 6
ঘ 8
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
ক Increase
খ Decrease
গ Remain the same
ঘ Initially increase and then decrease
A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil?
ক Decreases
খ Increases
গ Remains same
ঘ First increases and then decreases depending on the depth of iron in¬sertion
When the two coil sides forming a coil are spaced exactly one pole pitch apart they are said to be of
ক short pitch
খ full pitch
গ either of the above
ঘ none of the above
In the case of lap winding resultant pitch is
ক Multiplication of front and back pitches
খ Division of front pitch by back pitch
গ Sum of front and back pitches
ঘ Difference of front and back pitches
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
ক Cause withdrawing or throttling of steam
খ Reduce length of effective stroke of piston
গ Reduce maximum opening of port to steam
ঘ All of these
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will
ক Increase
খ Decrease
গ Remain constant
ঘ Be excessive
Which of the following property sets pitch or tone (high or low) for the synthesized speech when reading an element; the pitch may be specified absolutely or relative to the normal pitch for the voice-family used to read the text?
ক voice-check
খ voice-format
গ voice-pitch
ঘ voice-volume
In D.C. generators, lap winding is used for
ক High voltage, high current
খ Low voltage, high current
গ High voltage, low current
ঘ Low voltage, low current

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