When the planet Jupiter is at a distance of 824.7 million kilometres from the Earth, its angular diameter is measured to be 35.72” of arc. Then the diameter of Jupiter is:

1 1.34×109 m
2 1.43×109 m
3 1.34×108 m
4 1.43 ×108 m

Subtopic:  Measurement & Measuring Devices |
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NEET 2023 - Target Batch - Aryan Raj Singh
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A new unit of length is chosen such that the speed of light in the vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes \(8\) min and \(20\) secs to cover this distance?

1. \(500\) new units of length.
2. \(100\) new units of length.
3. \(300\) new units of length.
4. \(200\) new units of length.

Subtopic:  Dimensions |
 65%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

A student measures the thickness of a human hair by looking at it through a microscope of magnification \(100.\) He makes \(20\) observations and finds that the average width of the hair in the field of view of the microscope is \(3.5\) mm. The thickness of the hair is:
1. \(0.035\) mm
2. \(0.0035\) mm
3. \(0.35\) mm
4. \(3.5\) mm

Subtopic:  Measurement & Measuring Devices |
 61%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The photograph of a house occupies an area of 1.75 cm2 on a 35 mm slide. The slide is projected onto a screen, and the area of the house on the screen is 1.55 m2. What is the linear magnification of the projector-screen arrangement?

(1) 90.0

(2) 94.1

(3) 99.9

(4) 97.7

Subtopic:  Measurement & Measuring Devices |
 55%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The length, breadth, and thickness of a rectangular sheet of metal are \(4.234\) m, \(1.005\) m, and \(2.01\) cm respectively. The volume of the sheet to correct significant figures is:
1. \(0.00856\) m3
2. \(0.0856\) m3
3. \(0.00855\) m3
4. \(0.0855\) m3

Subtopic:  Significant Figures |
 58%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Which one of the following formulas is dimensionally incorrect?

1 y=asin2πtT
2 y=a2sin2πtT+cos2πtT
3 y=asinvt
4 y=asin2πtT+π

Subtopic:  Dimensions |
 63%
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NEET 2023 - Target Batch - Aryan Raj Singh
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The unit of length convenient on the atomic scale is known as an angstrom and is denoted by Ao 1 Ao=10-10 m. The size of a hydrogen atom is about 0.5 Ao. What is the total atomic volume in m3 of a mole of hydrogen atoms?

1 3×10-7 m3
2 2×10-7 m3
3 3×10-6 m3
4 2×10-6 m3

Subtopic:  Dimensions |
 53%
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NEET 2023 - Target Batch - Aryan Raj Singh
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One mole of an ideal gas at standard temperature and pressure occupies 22.4 L (molar volume). What is the ratio of molar volume to the atomic volume of a mole of hydrogen? (Take the size of the hydrogen molecule to be about 1 Å).

1 7.08×104
2 22.4×103
3 11.2×105
4 8.0×103

Subtopic:  Dimensions |
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NEET 2023 - Target Batch - Aryan Raj Singh
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The nearest star to our solar system is \(4.29\) light-years away. How much is this distance in terms of parsecs?
1. \(1.11\) parsec
2. \(1.22\) parsec
3. \(1.32\) parsec
4. \(1.39\) parsec

Subtopic:  Dimensions |
 50%
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The density of the Sun is: 

(Given, mass of the Sun = 2.0 x 1030 kg and radius of the Sun = 7.0 x 108m)

(1) 2.9 x 103 kg m-3

(2) 1.4 x 103 kg m-3

(3) 5.6 x 103 kg m-3 

(4) 1.9 x 103 kg m-3

Subtopic:  Measurement & Measuring Devices |
 65%
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NEET 2023 - Target Batch - Aryan Raj Singh
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