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TS EAMCET Mock Test - 9 - JEE MCQ


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30 Questions MCQ Test - TS EAMCET Mock Test - 9

TS EAMCET Mock Test - 9 for JEE 2024 is part of JEE preparation. The TS EAMCET Mock Test - 9 questions and answers have been prepared according to the JEE exam syllabus.The TS EAMCET Mock Test - 9 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for TS EAMCET Mock Test - 9 below.
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TS EAMCET Mock Test - 9 - Question 1

A semiconductor has an electron concentration of 8×1013 per cmand a hole concentration of 5 x 1012 per cm3. The electron mobility is 25000 cm2 V−1 s−1 
 and the hole mobility is 100 cm2 V. s−1 . Then,

Detailed Solution for TS EAMCET Mock Test - 9 - Question 1

TS EAMCET Mock Test - 9 - Question 2

The following figure is part of a horizontally stretched net. Section 'AB' is stretched with a force of 10 N. The tensions in the sections 'BC' and 'BF', respectively, are

Detailed Solution for TS EAMCET Mock Test - 9 - Question 2

From the figure,

T1 cos30° = T2 cos30°
∴ T1 = T2 = T (Let)
Again, Tsin 30° + T2 sin 30° = 10
2T sin 30° = 10
2T × 1/2 = 10
T = 10 N
∴ Tension in section BC and BF are 10 N and 10 N.

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TS EAMCET Mock Test - 9 - Question 3

The length of a wire of a potentiometer is 100 cm and the emf of its stand and cell is E volt. It is employed to measure the emf of a battery whose internal resistance is 0.5 W. If the balance point is obtained at l = 30 cm from the positive end, then the emf of the battery is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 3

Potential gradient of the potentiometer wire is
 V/cm
Emf of the cell is
, l = 30 cm

TS EAMCET Mock Test - 9 - Question 4

When a tuning fork of frequency 341 Hz is sounded with another tuning fork, six beats per second are heard. When the second tuning fork is loaded with wax and sounded with the first tuning fork, the number of beats is two per second. The natural frequency of the second tuning fork is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 4

Let frequency of second fork =x
We know that beat frequency =|f− f2|

On loading the fork with wax, its frequency decreases. So beat frequency will increase if,x=335 Hz and decrease if, x=347 Hz. According to the given condition, beat frequency decreases, so x=347 Hz

TS EAMCET Mock Test - 9 - Question 5

Consider two observers moving with respect to each other at a speed v along a straight line. They observe a block of mass moving over a distance l on a rough surface. The following quantities will be same as observed by the two observers

Detailed Solution for TS EAMCET Mock Test - 9 - Question 5

Velocity and displacement of block will be different from both the observers. But the force of friction observed by both the observes will be same. That is why acceleration of the block will be same.

TS EAMCET Mock Test - 9 - Question 6

In Bernoulli's theorem, which of the following is conserved?

Detailed Solution for TS EAMCET Mock Test - 9 - Question 6

Here,
P− P2 is the pressure difference between points A and B,
v1 is the velocity of the fluid at point A,  
vis the velocity of the fluid at point B and
h− h1 is the height difference between them.

The sum of energy per unit volume due to pressure (Pressure energy), energy per unit volume due to motion(Kinetic energy) and energy per unit volume due to gravity(Gravitational potential energy) remains constant, i.e., energy per unit volume remains constant, or we can say that in Bernoulli's theorem the energy remains conserved.

TS EAMCET Mock Test - 9 - Question 7

Which of the following is a strong electrolyte?

TS EAMCET Mock Test - 9 - Question 8

For a hypothetical reaction A → B, the activation energy for forward and backward reactions are 19 kJ/mol and 9 kJ/mol respectively. The heat of reaction is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 8

TS EAMCET Mock Test - 9 - Question 9

The term 'sorption' stands for

Detailed Solution for TS EAMCET Mock Test - 9 - Question 9

Sorption is the common term used for both absorption and adsorption. Absorption is the incorporation of a substance in one state into another of a different state (e.g., liquids being absorbed by a solid or gases being absorbed by water). Adsorption is the physical adherence or bonding of ions and molecules onto the surface of another molecule. The term 'sorption' is preferred when it is suspected that both processes are operative.

TS EAMCET Mock Test - 9 - Question 10

The important oxide ore of iron is

TS EAMCET Mock Test - 9 - Question 11

The role of a catalyst in a reversible reaction is to

TS EAMCET Mock Test - 9 - Question 12

∫[(sec2x)/(1+tanx)] dx =

TS EAMCET Mock Test - 9 - Question 13

If √2 + √3 + i be one of the roots of a given equation f(x) = 0 with real coefficients, then the lowest degree of such an equation must be____

Detailed Solution for TS EAMCET Mock Test - 9 - Question 13

Since the complex and irrational roots occure in pairs, therefore, if one root is 2 + √3 + i , then the other roots are

TS EAMCET Mock Test - 9 - Question 14

The range of the function f(x) = [x] − x, where [x] denotes the greatest integer ≤ x, is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 14

f(x) = [x] - x
= x - {x} - x
= -{x}
Range of {x} = [0, 1)
Range of -{x} = (-1, 0]

TS EAMCET Mock Test - 9 - Question 15

One factor of the determinant 

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TS EAMCET Mock Test - 9 - Question 16

The smallest positive integer n for which , is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 16

TS EAMCET Mock Test - 9 - Question 17

The vertices of a triangle are A (0, 0), B (0, 2) and C (2, 0). The distance between circumcentre and orthocentre is

TS EAMCET Mock Test - 9 - Question 18

if α+β=4 and α33=44, then α, β are the roots of the equation is 

Detailed Solution for TS EAMCET Mock Test - 9 - Question 18

∴ Required equation is

TS EAMCET Mock Test - 9 - Question 19

If A is a singular matrix, then A adj (A)

TS EAMCET Mock Test - 9 - Question 20

\'A\' draws two cards with replacement from a pack of 52 cards and \'B\' throws a pair of dice. What is the chance that \'A\' gets both cards of same suit and \'B\' gets total of 6?

TS EAMCET Mock Test - 9 - Question 21

The value of , where [x] denotes the greatest integer function is

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TS EAMCET Mock Test - 9 - Question 22

If m1, m2 are slopes of the two tangents that are drawn from (2, 3) to the parabola y2 = 4x, then the value of [(1/m1) + (1/m2)] is

TS EAMCET Mock Test - 9 - Question 23

The angle between the vectors i-j+k and i+2j+k is

TS EAMCET Mock Test - 9 - Question 24

The mean income of a group of persons is Rs.400. Another group of persons has mean income Rs.480. If the mean income of all the persons in the two groups together is Rs.430, then the ratio of the number of persons in the groups is 

Detailed Solution for TS EAMCET Mock Test - 9 - Question 24

TS EAMCET Mock Test - 9 - Question 25

If (4,2) and (k,−3) are conjugate points with respect to x2+y2−5x+8y+6=0, then k=

Detailed Solution for TS EAMCET Mock Test - 9 - Question 25

Let, S=x2+y2−5x+8y+6=0   ...(1) and points A(4, 2) and B(k, −3)

⇒  If A and B are conjugate points w.r.t equation (1) then,

TS EAMCET Mock Test - 9 - Question 26

TS EAMCET Mock Test - 9 - Question 27

The area enclosed within the curve |x| + |y| = 1 is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 27

|x| + |y| = 1
Area enclosed = 4 × (1/2) x 1 x 1 = 2

TS EAMCET Mock Test - 9 - Question 28

A man is known to speak truth 3 out of 4 times. He throws a die and reports that it is a six. The probability that it is actually a six is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 28

Let E1, E2 and A be the events defined as follows
E1 = six occurs
E2= six does not occurs
A = the man reports that it is a six. We have.

Now, P(A/E1)= Probability that the man reports that there is a six on the die given then 6 has occured on die
= Probability the man speaks truth

=3/4

P(A/E2) = Probability that the man reports that there is six is on die given that six has not occured on die
= Probability that the man does not speak truth

We have to find P(E1/A) i.e. the probability that there is six on the die given that the man has reported that there is six. By Baye's rule, we have

TS EAMCET Mock Test - 9 - Question 29

The derivative of an odd function is an

TS EAMCET Mock Test - 9 - Question 30

Let A and B be two sets such that n(A)=15 , n(B)=25, then number of possible values of n(AΔB) (Symmetric difference of A and B) is

Detailed Solution for TS EAMCET Mock Test - 9 - Question 30

So the possible numbers of n(A Δ B) are

10,12,14,16 ....... 40
 ⇒ 16 numbers

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