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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)
Which colour is the complementary colour of yellow ?
ক Blue
খ Green
গ Orange
ঘ Red
If Dust is called Air, Air is called Fire, Fire is called Water, Water is called Colour, Colour is called Rain and Rain is called Dust, where do Fish live ?
ক Dust
খ Fire
গ Colour
ঘ Water
In raster-scan colour monitors, colour can be intensified by:
ক grouping the phosphor dots in a circular pattern
খ having each electron gun controlled by a composite signal
গ using an in-line gun arrangement with a solid metal mesh
ঘ having each electron gun controlled by separate signal
ঙ None of the above
A system has two IDE hard drives that are each divided into primary and extended partitions, which drive letter is assigned to the primary partition of the second drive?
ক C
খ D
গ E
ঘ F
ঙ None of the above
There are six teachers. Out of them two are primary teachers and two are secondary teachers. They are to stand in a row, so as the primary teachers, middle teachers and secondary teachers are always in a set . The number of ways in which they can do so, is-
ক 52
খ 48
গ 34
ঘ None of these
What is the primary difference between primary and secondary cell batteries?
ক Primary-cell batteries can be recharged and used many times, whereas secondary-cell batteries cannot be properly recharged
খ Secondary-cell batteries can be recharged and used many times, whereas primary-cell batteries cannot be properly recharged
গ Primary-cell batteries use chemical cells, whereas secondary-cell batteries use an alternative energy source, such as thermal or magnetic energy, to supplement their outputs
ঘ Primary-cell batteries must be recharged at a much slower rate that secondary-cell batteries
ঙ None of the above
Which one is not a basic colour?
ক Red
খ Blue
গ Green
ঘ Yellow
Which one of the following is used to restore the colour of old oil paintings ?
ক Ozone
খ Hydrogen peroxide
গ Barium peroxide
ঘ Sodium peroxide
Which one of the following is responsible for the working of Newton's colour disc experiment ?
ক Formation of pure spectra
খ Formation of impure spectra
গ Persistence of vision
ঘ Principle of complementary colour

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