IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: If 4 circles of equal radius are drawn with vertices of a square as the centre , the side of the square being 7 cm, find the area of the circles outside the square ? 1781 05b5cc718e4d2b4197774f490
5b5cc718e4d2b4197774f490- 1119.21 sq cmfalse
- 2115.395 sq cmtrue
- 3104.214 sq cmfalse
- 4111.241 sq cmfalse
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उत्तर : 2. "115.395 sq cm"
व्याख्या :
Answer: B) 115.395 sq cm Explanation: Because each vertice of the square is the center of a circle(1/4) part of the total area of each circle inside of the square.(3/4) part of the total area of each circle outside of the square.Thus total area outside the square is 434×227×3.5×3.5 = 115.3955 sq cm.
प्र: Which of the following is not correct concerning nerves? 1781 05b5cc683e4d2b4197774c2ac
5b5cc683e4d2b4197774c2ac- 1Axons make up a majority of the matter in a nerve.true
- 2Nerves are collection of axons of either sensory or motor neurons but not both.false
- 3Nerves are covered by an outer sheath called the epineuriumfalse
- 4Nerves consist of parallel bundles of myelinated and nonmyelinated axons.false
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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.
प्र: Which sentence is written correctly? 1781 05b5cc6b3e4d2b4197774d403
5b5cc6b3e4d2b4197774d403- 1They never watch no movie during the working days, but in holidays they watch one movie.false
- 2They never watch none movie during the working days, but in holidays they watch one movie.false
- 3They don't never watch any movie during the working days, but in holidays they watch one movie.false
- 4They watch no movie during the working days, but in holidays they watch one movie.true
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उत्तर : 4. "They watch no movie during the working days, but in holidays they watch one movie."
व्याख्या :
Answer: D) They watch no movie during the working days, but in holidays they watch one movie. Explanation: They watch no movie during the working days, but in holidays they watch one movie. is correctly written among the given options.
प्र: Which Country has listed Yoga as a "sports activities"? 1781 15b5cc6bee4d2b4197774d99c
5b5cc6bee4d2b4197774d99c- 1Saudi Arabiatrue
- 2UAEfalse
- 3Sloveniafalse
- 4Pakistanfalse
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उत्तर : 1. "Saudi Arabia"
व्याख्या :
Answer: A) Saudi Arabia Explanation:
प्र: Let K and L be events on the same sample space, with P (K) = 0.8 and P (B) = 0.6. Are these two events are disjoint ? 1780 05b5cc6d7e4d2b4197774e6c6
5b5cc6d7e4d2b4197774e6c6- 1B) = 0.6. Are these two events are disjoint ? A)false
- 2= 0.6. Are these two events are disjoint ? A) TRUE B) FALSE Answer & Explanation Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(true
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उत्तर : 2. "= 0.6. Are these two events are disjoint ?
A) TRUE
B) FALSE
Answer & Explanation
Answer: B) FALSE
Explanation: These two events cannot be disjoint because P(K) + P(L) > 1.
P(AꓴB) = P("
व्याख्या :
Answer: B) FALSE Explanation: These two events cannot be disjoint because P(K) + P(L) > 1. P(AꓴB) = P(A) + P(B) - P(AꓵB). An event is disjoint if P(A ꓵ B) = 0. If K and L are disjoint P(K ꓴ L) = 0.8 + 0.6 = 1.4 And Since probability cannot be greater than 1, these two mentioned events cannot be disjoint.
प्र: Q = mc∆T refers to 1779 05b5cc64de4d2b4197774bcb7
5b5cc64de4d2b4197774bcb7- 1Enthalpy formulafalse
- 2Heat Transfer formulafalse
- 3Specific Heat formulatrue
- 4Heat of Vaporizationfalse
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उत्तर : 3. "Specific Heat formula"
व्याख्या :
Answer: C) Specific Heat formula Explanation: Q = mc∆T refers to Specific Heat formula. When heat energy is added to a substance, the temperature will change by a certain amount. The relationship between heat energy and temperature is different for every material, and the specific heat is a value that describes how they relate. Q = mc∆T Q = heat energy (Joules, J) m = mass of a substance (kg) c = specific heat (units J/kg∙K) ∆T = change in temperature (Kelvins, K)
प्र: The length, breadth and height of a room are in the ratio 7:3:1. If the breadth and height are doubled while the length is halved, then by what percent the total area of the 4 walls of the room will be increased ? 1779 05b5cc6c6e4d2b4197774de18
5b5cc6c6e4d2b4197774de18- 190%true
- 288%false
- 385%false
- 484%false
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उत्तर : 1. "90%"
व्याख्या :
Answer: A) 90% Explanation: Let length, breadth and height of the room be 7, 3, 1 unit respectively. Area of walls = 2(l+b)xh = 2(7+3)x1 = 20 sq. unit. Now, length, breadth and height of room will become 3.5, 6 and 2 respectively. Area of walls = 2(l+b)xh = 2(3.5+6)x2 = 38 sq. unit. % Increase in the area of walls = (38-20)x100/20 = 90%.
प्र: In general, which is the cause of a land breeze? 1778 05b5cc626e4d2b4197774b846
5b5cc626e4d2b4197774b846- 1Pressurefalse
- 2Heatfalse
- 3Temperaturetrue
- 4None of the abovefalse
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उत्तर : 3. "Temperature"
व्याख्या :
Answer: C) Temperature Explanation: The land breeze is a coastal breeze at night blowing from the land to the ocean. It is caused by the difference in the rates of cooling of the land and of the ocean. Once again, the bigger the difference in temperature between the two, the stronger the wind.