IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: What is Latus Rectum of Parabola? 1682 0

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    line segment
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    vertex
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    focus
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    major axis
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उत्तर : 1. "line segment"
व्याख्या :

Answer: A) line segment Explanation: As parabola is a locus of a point, which moves so that its distance from focus and directrix is always equal.   The latus rectum of a conic section is the chord (line segment) that passes through the focus, is perpendicular to the major axis and has both endpoints on the curve. The length of the latus rectum is determined differently for each conic.                                          The length of a parabola's latus rectum is 4p, where p is the distance from the focus to the vertex.

प्र: Simplify the fraction? 5 (2/7) - 3 (1/14) - 2 (1/14) - 1 (1/7) = ? + 3 (1/17) 1682 0

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    -4 (1/17)
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    5 (2/17)
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    -2 (1/17)
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    3 (3/17)
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उत्तर : 1. "-4 (1/17)"
व्याख्या :

Answer: A) -4 (1/17) Explanation: Given fraction is 5 (2/7) - 3 (1/14) - 2 (1/14) - 1 (1/7) = ? + 3 (1/17)  It can be written as  (5 - 3 - 2 - 1) + (2/7 - 1/14 - 1/14 - 1/7) = ? +  3 (1/17)  -1 + 0 - 3 (1/17) = ? => ? = -4 (1/17)

प्र: The more you take the more you leave behind. What is it? 1682 0

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उत्तर :
व्याख्या :

Footsteps.  Yes, as you walk forward, you will leave the footstep behind you.

प्र: How many digits will be there to the right of the decimal point in the product of 85.44 and .08455 ? 1681 0

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    7
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    5
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    4
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    6
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उत्तर : 4. "6"
व्याख्या :

Answer: D) 6 Explanation: Sum of decimal places = 7. Since the last digit to the extreme right will be zero (since 4 x 5 = 20), so there will be 6 significant digits to the right of the decimal point.

प्र: Which of the following is the longest river in India? 1681 0

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    Godavari
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    Ganga
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    Yamuna
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    Brahmaputra
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उत्तर : 2. "Ganga"
व्याख्या :

Answer: B) Ganga Explanation: India is a land of rivers. Rivers are generally treated as mothers and almost every major river of India has a legend regarding its origin.   The Ganges or Ganga is the longest river of India, if we consider the total distance covered by a river within India. Two major rivers of the Indian subcontinent – Brahmaputra and Indus – are though longer than the Ganges, but the distances these two rivers cover within India are much shorter than that of the Ganges. The Ganges is the most sacred river to the Hindus. The Ganges originates from Gangotri Glacier (Uttarakhand). The total length that the Ganges covers during its journey is 2,525 kilometers (1569 miles) before it discharges in the Bay of Bengal.   The Godavari, also known as 'Dakshin Ganga' – the South Ganges, is the second longest river of India. It originates from Triambakeshwar, Nasik (Maharashtra), and travels through Chhattisgarh, Telangana and Andhra Pradesh, before discharging into Bay of Bengal.

प्र: Wild animals are not considered a natural resource. 1681 0

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    TRUE
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    FALSE
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उत्तर : 2. "FALSE"
व्याख्या :

Answer: B) FALSE Explanation: The given statement is False. Wild animals are considered as a natural resource. Natural resources are resources taken from nature to satisfy our needs. These natural resources are: 1) Air 2) Water 3) Soil 4) Plants 5) Animals 6) Minerals 7) Forests 8) Natural Gas 9) Coal 10) Petroleum.

प्र: Which one of the following is not a prime number? 1680 0

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    91
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    71
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    41
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    31
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उत्तर : 1. "91"
व्याख्या :

Answer: A) 91 Explanation: Prime Numbers :: Numbers which are divisible by only 1 and itself are Prime Numbers.   It's answer will be 91. Because 91 can be divisible by 7,13,91,1. It is quite clear that prime number should be divisible only by itself and by 1.

प्र: Which of the following is not correct concerning nerves? 1679 0

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    Axons make up a majority of the matter in a nerve.
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    Nerves are collection of axons of either sensory or motor neurons but not both.
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    Nerves are covered by an outer sheath called the epineurium
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    Nerves consist of parallel bundles of myelinated and nonmyelinated axons.
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उत्तर : 1. "Axons make up a majority of the matter in a nerve."
व्याख्या :

Answer: A) Axons make up a majority of the matter in a nerve. Explanation: Axons make up a majority of the matter in a nerve is the one statement regarding nerves is incorrect.

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