IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Antonym of:: Amicable 1432 0

  • 1
    Hostile
    सही
    गलत
  • 2
    Loveable
    सही
    गलत
  • 3
    Friendly
    सही
    गलत
  • 4
    Peaceful
    सही
    गलत
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उत्तर : 1. "Hostile"
व्याख्या :

Answer: A) Hostile Explanation: Amicable means Friendly or in Loveable, peaceful sense. Then Antonyms for Amicable are Opposite of Friendly => Unfriendly, Hostile, Unpeaceful, etc...

प्र: Is DRAM Volatile or Nonvolatile? 1632 0

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उत्तर :
व्याख्या :

DRAM is a Volatile random-access memory (VRAM).   Volatile random-access memory (VRAM) is random-access memory that retains its information when power is turned on. Examples of volatile memory are primary storage (typically dynamic RAM, DRAM), and fast CPU cache memory (typically static RAM, SRAM, which is fast but energy-consuming and offer lower memory capacity per area unit than DRAM). Non-volatile random-access memory (NVRAM) is random-access memory that retains its information when power is turned off. Examples of non-volatile memory are flash memory (used as secondary memory) and ROM, PROM, EPROM and EEPROM memory (used for storing firmware such as BIOS).

प्र: A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of 1430 0

  • 1
    18 m/s
    सही
    गलत
  • 2
    25 m/s
    सही
    गलत
  • 3
    30 m/s
    सही
    गलत
  • 4
    36 m/s
    सही
    गलत
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उत्तर : 3. "30 m/s"
व्याख्या :

Answer: C) 30 m/s Explanation: The interval between object pass the same point is 4 sec. That means in 2 sec, object reaches the top and in next 2 sec, it again reaches the same point. By the info given, we can find the velocity of that point by using : v=u+(-gt) 0= u - 10×2 u = 20 Then the velocity at 25m is 20m/sec. so the initial velocity is -v2 = u2 + (-2gh)400 = u2 - 2x 10 x 25u2 = 900 => u = 30 m/s

प्र: What is the freezing point of water in Celsius? 1455 0

  • 1
    0 deg C
    सही
    गलत
  • 2
    32 deg C
    सही
    गलत
  • 3
    -42 deg C
    सही
    गलत
  • 4
    -32 deg C
    सही
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उत्तर : 1. "0 deg C"
व्याख्या :

Answer: A) 0 deg C Explanation: The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.

प्र: The first stage in the formation of coal is 1856 1

  • 1
    Lignite
    सही
    गलत
  • 2
    Bituminous
    सही
    गलत
  • 3
    Anthracite
    सही
    गलत
  • 4
    Peat
    सही
    गलत
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उत्तर : 4. "Peat"
व्याख्या :

Answer: D) Peat Explanation: The first of the four stages of coal formation is lignite coal.   There are four stages of coal formation:   1. Peat,   2. Lignite,   3. Bituminous and   4. Anthracite. The bacteria has removed a large portion of the other constituents of the plant matter and left around 25 to 34 percent.

प्र: 11 P in a CT 1781 0

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उत्तर :
व्याख्या :

11 P in a CT means 11 Players in a Cricket Team.

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उत्तर : 4. "149600 kgs"
व्याख्या :

Answer: D) 149600 kgs Explanation: Let the total quantity of gold be p kgs. According to the question, 50% of p + 25% of p + 12.5% of p = 130900 87.5% of p = 130900 p = 130900 x 100/87.5  = 149600 kgs.   Therefore, the initial gold quantity that king has = p = 149600 kgs.

प्र: The Ankle is a third-class lever. 2133 0

  • 1
    TRUE
    सही
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  • 2
    FALSE
    सही
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उत्तर : 2. "FALSE"
व्याख्या :

Answer: B) FALSE Explanation: False. The ankle is not the third-class lever in the body.   Levers are typically labeled as first class, second class, or third class. All three types are found in the body, but most levers in the human body are third class. First-class levers in the human body are rare and have the axis (fulcrum) located between the weight (resistance) and the force. One example is the joint between the head and the first vertebra. In a second-class lever, the weight (resistance) is located between the axis (fulcrum) and the force. An example of a second-class lever in the human body is found in the lower leg when someone stands on tiptoes In a third-class lever, the most common in the human body, force is applied between the resistance (weight) and the axis (fulcrum). There are numerous third-class levers in the human body; one example can be illustrated in the elbow joint.

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