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06 Feb 2022: The Hindu Analysis

UPSC Current Affairs Preparation: The Hindu Analysis Watch expert analysis of ‘The Hindu’ dated 06 Feb 2022. Important news and views to boost... View Article

Gist of EPW January Week 5, 2022

The Economic and Political Weekly (EPW) is an important source of study material for IAS, especially for the current affairs segment. In this... View Article

NCAVES – NCAVES India Project For UPSC

The Natural Capital Accounting and Valuation of Ecosystem Services (Ncaves) project aims to advance the theory and practice related to... View Article

Long Term Repo Operation – Everything you need to know about LTRO

Long Term Repo Operation (LTRO) is fundamentally a means to infiltrate liquidity into the banking system and financial institutions to ensure the... View Article

06 Feb 2022: UPSC Exam Comprehensive News Analysis

CNA 06 Feb 2022:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related B. GS 2 Related POLITY AND GOVERNANCE 1. Many Seats redrawn in J&K... View Article

05 Feb 2022: PIB Summary for UPSC

TABLE OF CONTENTS 1. Statue of Equality 2. ICRISAT 3. One District One Product 1. Statue of Equality Syllabus: GS I, Indian Heritage... View Article

What happens inside optical fibre?

1) Diffraction 2) Polarisation 3) Interference 4) Total internal reflection Answer: 4) Total internal reflection Solution:... View Article

The maximum peak to peak voltage of an AM wire is 24 mV and the minimum peak to peak voltage is 8 mV. The modulation factor is

1) 10% 2) 20% 3) 25% 4) 50% Answer: 4) 50% Solution: Vmax = 24/2 = 12 Vmin = 8/2 = 4 Modulation factor = (Vmax - Vmin)/(Vmax... View Article

The radio waves of frequency 300 MHz to 3000 MHz belong to

1) High Frequency band 2) Very high frequency band 3) Ultra high frequency band 4) Super high frequency band Answer: 3) Ultra high... View Article

A step index fibre has a relative refractive index of 0.88%. What is the critical angle at the core cladding interface?

1) 60° 2) 75° 3) 45° 4) None of these Answer: 4) None of these Solution: Relative refractive index, (n1 - n2)/n1 =... View Article

In a diode AM-detector, the output circuit consists of R = 1 kΩ and C =10 pF. A carrier signal of 100 kHz is to be detected. Is it good

1) Yes 2) No 3) Information is not sufficient 4) None of the above Answer: 2) No Solution: For better demodulation... View Article

The frequency band used in the downlink of satellite communication is

1) 9.5 to 2.5 GHz 2) 896 to 901 MHz 3) 3.7 to 4.2 GHz 4) 840 to 935 MHz 5) 3.7 to 4.2 MHz Answer: 3) 3.7 to 4.2 GHz Solution:... View Article

When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant, the modulation system is

1) Amplitude modulation 2) Phase modulation 3) Frequency modulation 4) All of these Answer: 3) Frequency modulation Solution:... View Article

For efficient transmission of a 100 MHz frequency wave, the minimum length of an antenna should be

1) 3 m 2) (¾) m 3) 10 m 4) 100 m Answer: 2) (¾) m Solution: Height of the antenna = (1/4) x wavelength ... View Article

Suppose the amplitude of a modulated wave is equal to the signal amplitude. Then modulation is

1) 10% 2) 25% 3) 50% 4) 100% Answer: 4) 100% Solution: If the amplitude of a modulated wave is equal to the signal... View Article

Which of the following is related to telecommunication?

1) X-rays 2) r-rays 3) Sound wave 4) Microwaves Answer: 4) Microwaves Solution: Microwaves is used in telecommunication... View Article

For an amplitude modulated wave, the maximum amplitude is found to be 9V while the minimum amplitude is found to be 3V. The modulation index is____________

1) 100% 2) 75% 3) 50% 4) 25% Answer:50 % Solution: μ = [(Vmax - Vmin)/(Vmax + Vmin)] x 100 = [(9 - 3)/(9+ 3)] x 100 = (6/12) x 100 =... View Article

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