Download JEE-Main 2020 B.Tech 8th Jan 2020 Shift 1 Question Paper

Question Paper Name: BTECH 8th Jan 2020 Shift 1

Subject Name: BTECH

Creation Date: 2020-01-08 15:09:15

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Duration: 180

Total Marks: 300

Display Marks: Yes

Group Number : 1

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Group Id : 40503618

Group Maximum Duration : 0

Group Minimum Duration : 180

Show Attended Group? : No

Edit Attended Group? : No

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Break time: 0

Group Marks: 300

Is this Group for Examiner?: No

Section Id : 4056

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Section Number : 1

Section type : Online

Mandatory or Optional: Mandatory

Number of Questions: 25

Number of Questions to be attempted: 25

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Section Marks: 100

Sub-Section Number: 1

Sub-Section Id: 40503686

Question Shuffling Allowed : Yes

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Question Number : 1 Question Type : MCQ Option Shuffling: Yes

Correct Marks: 4 Wrong Marks : 1

Note: For this question, discrepancy is found in question/answer. Full Marks is being awarded to all candidates.

The dimension of stopping potential V₀ in photoelectric effect in units of Planck's constant 'h', speed of light 'c' and Gravitational constant 'G' and ampere A is:

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Options:

1. h² G^3/2 c^1/3 A^-1
2. h^1/3 G^2/3 c^1/3 A^-1
3. h^2/3 c^5/3 G^1/3 A^-1
4. h^-2/3 c^-1/3 G^4/3 A^-1

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Question Number: 2 Question Type : MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

A particle of mass m is fixed to one end of a light spring having force constant k and unstretched length l. The other end is fixed. The system is given an angular speed ? about the fixed end of the spring such that it rotates in a circle in gravity free space. Then the stretch in the spring is :

Options:

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1. ml?² / (k+m?²)
2. ml?² / (k-m?²)
3. ml?² / (k+m?)
4. ml?² / (k-?m)

Question Number: 3 Question Type: MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

Uniform flag shaped lamina (thin flat plate) of mass 4 kg. (The coordinates of the same are shown in figure) are :

(0,3) (2, 3)

(1, 2) (2, 2)

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(0,0) (1,0)

Options:

1. (0.75 m, 1.75 m)
2. (0.75 m, 0.75 m)
3. (1 m, 1.75 m)

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4. (1.25 m, 1.50 m)

Question Number: 4 Question Type : MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

Consider a uniform rod of mass M=4m and length 1 pivoted about its centre. A mass m moving with velocity v making angle ? = p/4 to the rod's long axis collides with one end of the rod and sticks to it. The angular speed of the rod-mass system just after the collision is:

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Options:

1. 3v / 7l
2. 3v / 7v2 l
3. 3v2 v / 7l
4. 4v / 7l

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Question Number: 5 Question Type : MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

Consider two solid spheres of radii R₁=1m, R₂=2m and masses M₁ and M₂, respectively. The gravitational field due to sphere 1 and 2 are shown. The value of M₁/M₂ is:

Options:

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1. 1/6
2. 1/3
3. 1/2
4. 2/3

Question Number: 6 Question Type : MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

Consider a solid sphere of radius R and mass density ?(r) = ?₀(1 - r²/R²), 0 < r = R. The minimum density of a liquid in which it will float is:

Options:

1. ?₀/5

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2. ?₀/3
3. 2?₀/5
4. 2?₀/3

Question Number: 7 Question Type : MCQ Option Shuffling: Yes

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Correct Marks : 4 Wrong Marks : 1

A leak proof cylinder of length 1 m, made of a metal which has very low coefficient of expansion is floating vertically in water at 0°C such that its height above the water surface is 20 cm. When the temperature of water is increased to 4°C, the height of the cylinder above the water surface becomes 21 cm. The density of water at T = 4°C, relative to the density at T =0°C is close to :

Options:

1. 1.04
2. 1.01

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3. 1.26
4. 1.03

Question Number: 8 Question Type : MCQ Option Shuffling: Yes

Correct Marks : 4 Wrong Marks : 1

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A thermodynamic cycle xyzx is shown on a V-T diagram.

The P-V diagram that best describes this cycle is: (Diagrams are schematic and not to scale)

Options:

1. This download link is referred from the post: JEE-Main Last 10 Years 2011-2021 Previous Question Papers

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