Related Questions

A form of modulation In which the amplitude of a carrier wave is varied in accordance with some characteristic of the modulating signal, is known as
A Aloha
B Angle modulation
C Amplitude modulation
D modem
E None of the above
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be
A Same
B More
C Less
D More/less depending on rating
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by
A Designing new impeller
B Trimming the impeller size to the required size by machining
C Not possible
D Some other alterations in the impeller
One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
A Improved efficiency
B Better linearity
C High power output per transistor
D The lower modulating power requirement
If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.
A True
B False
For water evaporating into usaturated air under adiabatic conditions and at constant pressure, the __________ remains constant throughout the period of vaporisation.
A Dry bulb temperature
B Wet bulb temperature
C Humidity
D Relative saturation
গরম বাতাসে পরিপূর্ণ M ভরের একটি বেলুন (থ্রডি সহ) পৃথিবীর দিকে খুব ত্বরণ a তে নেমে আসছে। ঝুড়ি থেকে কি পরিমান m ভর ফেলে দিলে বেলুনটি উপরের দিকে একই খুব ত্বরন a- তে উঠে যাবে ? সকল ক্ষেত্রে বেলুনটির আয়তন একই ছিল বলে ধরে নেওয়া হলো। (g = অভিকর্ষীয় ত্বরন)(A hot air balloon with a bucket is descending towards the earth with a constant acceleration a. The combined mass of the balloon and bucket is M. What mass m from the bucket should be released so that the balloon starts ascending up with the same acceleration a? Consider the volume of the balloon remains constant at all the time. (g=acceleration due to gravity))
A m=2ag+aM
B m=g+a2M
C m=2ag M
D m=M2a(g+a)
E m=ag+M
When the modulating signal controls the frequency of the carrier, we get___________
A Phase modulation
B Amplitude modulation
C Frequency modulation
D May be any one of the above
In the case of bodies falling under gravity which of the following remains constant at a given place?
A Kinetic energy
B Potential energy
C acceleration
D all the above
If the cash reserve ratio is lowered by the RBI, its impact on credit creation will be to
A increase it
B decrease it
C no impact
D None of the above

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