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Indian Air Force Agniveer Science Subject Mock Test - 6 - Indian Air Force Agniveer Vayu MCQ


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30 Questions MCQ Test Indian Air Force Agniveer Vayu Group X Mock Test Series 2025 - Indian Air Force Agniveer Science Subject Mock Test - 6

Indian Air Force Agniveer Science Subject Mock Test - 6 for Indian Air Force Agniveer Vayu 2025 is part of Indian Air Force Agniveer Vayu Group X Mock Test Series 2025 preparation. The Indian Air Force Agniveer Science Subject Mock Test - 6 questions and answers have been prepared according to the Indian Air Force Agniveer Vayu exam syllabus.The Indian Air Force Agniveer Science Subject Mock Test - 6 MCQs are made for Indian Air Force Agniveer Vayu 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Indian Air Force Agniveer Science Subject Mock Test - 6 below.
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Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 1

Who discovered ultra-short radio waves?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 1
  • Jagadish Chandra Bose discovered the ultra-short waves. He attended Cambridge after studying physics at Calcutta University.
  • He was the first to demonstrate radio communication with millimetre wavelengths, which fall in the 30GHz to 300GHz spectrum.
  • However, Radio waves were first predicted by James Clerk Maxwell and Heinrich Hertz was the first to generate radio waves under experimental conditions.
Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 2

A ball is dropped from a high rise platform at t = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18s.What is the value of v? [2010] (take g = 10 m/s2)

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 2

Clearly distance moved by 1st bal l in 18s = distance moved by 2nd ball in 12s.
Now, distance moved in 18 s by 1st

= 90 x 18 = 1620 m

Distance moved in 12s by 2nd ball

∴ 1620 = 12 v + 5 x 144

⇒    v = 135 – 60 = 75 ms –1

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 3

Two billiard balls A and B. each of mass 50 g and moving in opposite directions with speed of 5 m s-1 each, collide and rebound with the same speed. The impulse imparted to each ball is 

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 3


Initial momentum of ball A = (0.05kg)(5ms(-1)) = 0.25kgms−1
As the speed is reversed on collision,
Final momentum of the ball
A = (0.05kg)(−5ms−1) = −0.25kgms−1
Impulse imparted to the ball A = Change in momentum of ball A
= Final momentum - Initial momentum
= −0.25kg ms−−0.25kg ms−1 = −0.5kg ms−1
Similarly,
Initial momentum of ball B = (0.05kg)(−5ms−1) = −0.25kgms−1
Final momentum of ball B = (0.05kg)(5ms−1) = = +0.25kgms−1
Impulse imparted to ball B = (0.25kgms−1) − (−0.25kgms−1) =  0.5kgms−1
Impulse imparted to each ball is 0.5kgms−1 in magnitude. The two impulses are opposite in direction.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 4

All the points of a rigid body rotating about the given axis have same :

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 4

Thus, it is the velocity of a reference point fixed to the body. During purely translational motion (motion with no rotation), all points on a rigid body move with the same velocity. However, when motion involves rotation, the instantaneous velocity of any two points on the body will generally not be the same.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 5

Which of the following represents Hooke’s Law?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 5

The  law states that the strain in a solid is proportional to the applied stress within the elastic limit of that solid body i.e. stress = k x strain.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 6

In which of the following processes is heat transfer equal to zero?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 6

Entropy is defined as dQ/T. In an isentropic process dQ/T = 0 which means dQ = 0. Diathermic is a process in which heat flow is easily possible. Isochoric process is one in which volume is constant. Isothermal process is one in which temperature stays constant.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 7

Hot coffee in a thermos flask is shaken vigorously, considering it as a system which of the statement is not true?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 7

No, heat is not transferred as the flask is insulated from the surroundings ∴dQ=0

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 8

According to Ohm's law

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 8

Ohm’s law states I is proportional to V.This holds good at steady temperatures and for the flow of constant current.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 9

Which of the following is not correct about cyclotron?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 9

The charged particles and ions in cyclotron can move along circular path only.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 10

Emission line spectra of different elements

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 10

A spectrum is an assembly of energy levels in the form of radiations emitted by an atom in its excited state. Every atom gives discontinuous line spectra. Each line in the spectra corresponds to a specific wavelength and it is unique to a given element so no two elements give the same pattern of lines in their spectra.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 11

Which of the following is the universal gate?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 11

A universal gate is a gate which can implement any Boolean function without need to use any other gate type. The NAND and NOR gates are universal gates. In practice, this is advantageous since NAND and NOR gates are economical and easier to fabricate and are the basic gates used in all IC digital logic families.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 12

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 12

sin(A+B)-sin(A-B) = 2cosAsinB 
= 2cos(π/4)sinX
= 2 × 1/√2 sin X
= √2sinX

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 13

The distance of the point (3, 4, 5) from X-axis is:

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 14

If nC8 = nC2, then n is

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 14

Given nC8 = nC2
if nCr = nCp
Then either r=p or r=n−p
Thus, nC8 = nC2
8=n−2
10=n
∴ n=10

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 15

If the coefficients of (r +1)th term and (r + 3)th term in the expansion of (1+x)2n be equal then

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 15

Tr+1 = 2nCr(x)r (1)2n-r
Tr+3 = 2nCr+2 (x)r+2 (1)2n-r-2
Tr+1 : Tr+3 
= 2nCr = 2nCr+2
=> 2n!/(2n-r)!r! = 2n!/(r+2)!(2n-r-2)!
=> 1/(2n-r)(2n-r-1) = 1/(r+2)(r+1)
=> (r+2)(r+1) = (2n-r)(2n-r-1)
=> r2 + 3r + 2 = 4n2 - 2nr - 2n - 2nr + r^2 + r
=> 0 = 4n2 - 4nr - 2n + r - 3r - 2
=> 0 = 4n2 - 4nr - 2n + r - 3r - 2 - 2 + 2
=> 0 = 4n2 - 4nr - 4 - [2n + 2r - 2]
=> 4n(n-r-1) -2(n-r-1)
Therefore n - r - 1 = 0
=> n = r+1

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 16

The distance between the parallel lines 3x + 4y + 13 = 0 and 3x + 4y – 13 = 0 is

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 16

Given parallel lines3x +4y+13=0
perp length from origin P1= 13/√(3)2 +(4)2
=13/5
and another line 3x+4y-13=0 P2= -13/√(3)2+(4)2
=-13/5
Now distance b/w parallel lines
D=P1-P2
=13/5+13/5
=26/5 units

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 17

The equation of circle of radius 5 units touches the coordinates axes in the second quadrant is:

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 17

If the circle lies in second quadrant
The equation of a circle touches both the coordinate axes and has radius a is
x2 + y2 + 2ax - 2ay + a2 = 0
Radius of circle, a = 5
x2 + y2 + 10x - 10y + 25 = 0 

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 18

Determine the direction cosines of the normal to the plane and the distance from the origin. Plane z = 2

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 18

We have z = 2 . , it can be written as : 0x+0y+1z = 2. Compare it with lx+my+nz = d , we get ; l = 0 , m = 0 , n = 1 and d = 2 . therefore , D.C.’s of normal to the plane are 0 , 0 , 1 and distance from the origin = 2.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 19

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 19


 

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 20

The slope of the tangent to the curve x = a sin t, y = a  at the point ‘t’ is

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 20

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 21

Evaluate: 

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 21

Let I = ∫(0 to pi/2)x3 sin(tan−1x4)/(1+x8)dx
Put tan−1 x4 = t
4x3/(1+x8)dx = dt
⇒x3dx/(1+x8) = dt/4
Now, I = 1/4∫sin t dt
=−[1/4 cos t]0 to pi/2 + c
= -1/4[cos(0) - cos(pi/2)] +c
= 1/4[-cos(pi/2) + cos(0)] +c
= ¼[-0+1]
= 1/4 

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 22

If a, b, c be any three positive numbers, then the least value of  (a + b + c) 

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 22

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 23

OBEYING 

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 23

The antonym of  OBEYING is  Refusing

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 24

Read the each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'D'. (Ignore the errors of punctuation, if any).

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 24

If I have the time

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 25

Civilisation means outward….(21)… whereas culture means inward perfection. We may be…(22)...today, but we are not cultured. We have trains, aeroplanes and all the modern modes and ….(23).. . This is…(24)…on the road of materialism but we have lost our finer emotions. Civilisation has…..(25)…mystery and romance out of the heart of nature and …..(26)… her beauty and magic. It has placed…..(27)….power in the hands of man, making him a….(28)….. With a single atom or hydrogen bomb, he can rain death and ..(29)…… in millions of innocent creatures. Thus, he is out to….(30)…..himself with his own hands.

Q. Find the word most appropriate for Blank No. 29

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 25

B is the correct option. Dearth means scarcity or lack of something.
so according to the sentence hydrogen bomb can lead to lack of small and innocent creatures like microorganisms, etc.
 

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 26

Civilisation means outward….(21)… whereas culture means inward perfection. We may be…(22)...today, but we are not cultured. We have trains, aeroplanes and all the modern modes and ….(23).. . This is…(24)…on the road of materialism but we have lost our finer emotions. Civilisation has…..(25)…mystery and romance out of the heart of nature and …..(26)… her beauty and magic. It has placed…..(27)….power in the hands of man, making him a….(28)….. With a single atom or hydrogen bomb, he can rain death and ..(29)…… in millions of innocent creatures. Thus, he is out to….(30)…..himself with his own hands.

Find the word most appropriate for Blank No. 30

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 27

Recently discovered gravitational lensing around certain proximate stars stronglysuggests that the nine planets of our solar system are a common phenomenonin the universe rather than developing incidentally from a unique galactic phenomenon several billion years ago.

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 27

The first thing you should consider here is whether to use rather or instead. Instead does not have an element of choice in it, merely an element of replacement. You would say, for example: I went instead of Jack. You would also say: He is a weak man rather than a timid man. Because this is not a case of replacement, you need the word ‘rather’. That leaves us with choices A, B and C as possible answers. A correct comparison is required. The planets are a ‘phenomenon... rather then a type’. You are correctly comparing two nouns so A can be eliminated. ‘Incidental of’ is an incorrect structure. ‘Incidental to’ is correct. Therefore only B is eliminates all these errors and is the correct answer.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 28

Directions: Rearrange the following five sentences in the proper sequence to form a coherent paragraph, and then answer the question given below.

(i) If no evil had existed in this world, man would never have dreamt of those numerous divinities to which he has rendered such various modes of worship.
(ii) The man, always contented, would only have occupied himself with satisfying his wants; with enjoying the present, with feeling the influence of objects, that would unceasingly warn him of his existence in a mode that he must necessarily approve; nothing would alarm his heart; everything would be analogous to his existence.
(iii) These feelings can only be the consequence of some troublesome sensation, which must have previously affected him, or which by disturbing the harmony of his machine, has interrupted the course of his happiness; which has shown him he is naked.
(iv) He would neither know fear, experience distrust, nor have in quietude for the future.
(v) If nature had permitted him easily to satisfy all his regenerating wants, if she had given him none but agreeable sensations, his days would have uninterruptedly rolled on in perpetual uniformity; he would never have discovered his own nakedness.

Q. Which of the following should be the FIFTH sentence after rearrangement?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 28

The correct arrangement is 'i-v-ii-iv-iii'. The 'i-v' link can be easily established through a series of conditions starting with 'if'. 'Man' is first mentioned in 'i', so it is the introductory sentence. Sentence 'v' (nature had permitted him) refers to the man mentioned in 'i'. Sentence 'ii' indicates the result of the condition mentioned in 'i' and 'v'. 'He' in 'iv' refers to 'the man' in 'ii'. 'These feelings', in 'iii', refer to 'fear, distrust etc' mentioned in 'iv'.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 29

Directions: Read the passage carefully and answer the questions that follow:

There is now no denying that the new government takes office amid a clear economic slowdown. The first macro data set released showed an under-performing economy with GDP growth falling to 5.8% in the fourth quarter of 2018-19 and pulling down the overall growth for the fiscal to a five-year low of 6.8%. Growth in gross value added (GVA), which is GDP minus taxes and subsidies, fell to 6.6% in 2018-19, pointing to a serious slowdown. If further confirmation were needed, the growth in core sector output — a set of eight major industrial sectors — fell to 2.6% in April, compared to 4.7% in the same month last year. And finally, unemployment data, controversially suppressed by the Union government so far, showed that joblessness was at a 45-year high of 6.1% in 2017-18. These numbers highlight the challenges ahead in drafting the Budget for 2019-20. The economy is beset by a consumption slowdown as reflected in the falling sales of everything from automobiles to consumer durables, even fast-moving consumer goods. Private investment is not taking off, while government spending, which kept the economy afloat during the last NDA government, was cut back in the last quarter of 2018-19 to meet the fiscal deficit target of 3.4%.

The good news is that inflation is undershooting the target and oil prices are on the retreat again. But the rural economy remains in distress, as seen by the 2.9% growth in agriculture last fiscal; the sector needs a good monsoon this year to bounce back. Overall economic growth in the first quarter of this fiscal is likely to remain subdued, and any improvement is unlikely until the late second quarter or the early third. There are not too many options before the new Finance Minister. In the near term, she has to boost consumption, which means putting more money in the hands of people. That, in turn, means cutting taxes, which is not easy given the commitment to rein in the fiscal deficit. In the medium term, Ms. Sitharaman has to take measures to boost private investment even as she opens up public spending again. These call for major reforms, starting with land acquisition and labour, corporate taxes by reducing exemptions and dropping rates, and nursing banks back to health. On the table will be options such as further recapitalisation of the ailing banks, and consolidation. The question, though, is where the money will come from. With tax revenues likely to be subdued owing to the slowdown, the Centre will have to look at alternative sources such as disinvestment. There may be little choice but to go big on privatisation. A rate cut by the Reserve Bank of India, widely expected this week, would certainly help boost sentiment. But it is the Budget that will really set the tone for the economy

Q. Which of the following, as per the passage, indicate a slowdown in the Indian economy?
I. Fall in sale levels of consumer durables
II. Negative growth in the core sector output
III. Fall in inflations levels

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 29

Refer to: ‘If further confirmation were needed, the growth in core sector output — a set of eight major industrial sectors — fell to 2.6% in April, compared to 4.7% in the same month last year. And finally, unemployment data, controversially suppressed by the Union government so far, showed that joblessness was at a 45-year high of 6.1% in 2017-18. These numbers highlight the challenges ahead in drafting the Budget for 2019-20. The economy is beset by a consumption slowdown as reflected in the falling sales of everything from automobiles to consumer durables, even fast-moving consumer goods.’

I is correct while II is incorrect as the growth has merely slowed down and has not gone in the negative for the core sector. III has not been mentioned in the passage and cannot be inferred.

Only I is correct

Hence, option A is correct.

Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 30

Directions: Read the passage carefully and answer the questions that follow:

There is now no denying that the new government takes office amid a clear economic slowdown. The first macro data set released showed an under-performing economy with GDP growth falling to 5.8% in the fourth quarter of 2018-19 and pulling down the overall growth for the fiscal to a five-year low of 6.8%. Growth in gross value added (GVA), which is GDP minus taxes and subsidies, fell to 6.6% in 2018-19, pointing to a serious slowdown. If further confirmation were needed, the growth in core sector output — a set of eight major industrial sectors — fell to 2.6% in April, compared to 4.7% in the same month last year. And finally, unemployment data, controversially suppressed by the Union government so far, showed that joblessness was at a 45-year high of 6.1% in 2017-18. These numbers highlight the challenges ahead in drafting the Budget for 2019-20. The economy is beset by a consumption slowdown as reflected in the falling sales of everything from automobiles to consumer durables, even fast-moving consumer goods. Private investment is not taking off, while government spending, which kept the economy afloat during the last NDA government, was cut back in the last quarter of 2018-19 to meet the fiscal deficit target of 3.4%.

The good news is that inflation is undershooting the target and oil prices are on the retreat again. But the rural economy remains in distress, as seen by the 2.9% growth in agriculture last fiscal; the sector needs a good monsoon this year to bounce back. Overall economic growth in the first quarter of this fiscal is likely to remain subdued, and any improvement is unlikely until the late second quarter or the early third. There are not too many options before the new Finance Minister. In the near term, she has to boost consumption, which means putting more money in the hands of people. That, in turn, means cutting taxes, which is not easy given the commitment to rein in the fiscal deficit. In the medium term, Ms. Sitharaman has to take measures to boost private investment even as she opens up public spending again. These call for major reforms, starting with land acquisition and labour, corporate taxes by reducing exemptions and dropping rates, and nursing banks back to health. On the table will be options such as further recapitalisation of the ailing banks, and consolidation. The question, though, is where the money will come from. With tax revenues likely to be subdued owing to the slowdown, the Centre will have to look at alternative sources such as disinvestment. There may be little choice but to go big on privatisation. A rate cut by the Reserve Bank of India, widely expected this week, would certainly help boost sentiment. But it is the Budget that will really set the tone for the economy

Q. Which of the following is the closest in meaning to the word beset?

Detailed Solution for Indian Air Force Agniveer Science Subject Mock Test - 6 - Question 30

Beset: Something that troubles persistently.

As per this, besiege is correct and has the same meaning as beset.

The others are incorrect.

Hence, option C is correct.

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