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-)
A তড়িৎ প্রবাহের মান দ্বিগুণ হবে (current will be doubled)
B তড়িৎ প্রবাহের মান অর্ধেক হবে (current will be halved)
C তড়িৎ বিভবের মান অর্ধেক হবে (voltage will be halved)
D তড়িৎ প্রবাহের মান সমান থাকবে (Current will remain the same)
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
A Increase
B Decrease
C Remain the same
D Initially increase and then decrease
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)
A B.P.F. - 1
B 1 - B.P.F.
C $$\frac{1}{{{\text{B}}{\text{.P}}{\text{.F}}{\text{.}}}}$$
D 1 + B.P.F.
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?
A Decreases
B Increases
C Remains same
D First increases and then decreases depending on the depth of iron in¬sertion
During sensible cooling of air, its wet bulb temperature
A Decreases but dew point remains constant
B Increases but dew point remains constant
C Increases & the dew point decreases
D Decreases & the dew point increases
The wet bulb temperature during sensible cooling of air
A Remains constant
B Increases
C Decreases
D None of these
During sensible cooling of air, specific humidity
A Remains constant
B Increases
C Decreases
D None 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
A Increase
B Decrease
C Remain constant
D Be excessive
During sensible cooling,
A Relative humidity remains constant
B Wet bulb temperature increases
C Specific humidity increases
D Partial pressure of vapour remains constant
Which of the following remains constant during sensible cooling process ?
A Specific humidity
B Partial pressure of vapour
C Both A & B
D Neither A nor B

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