GATE प्रश्न और उत्तर का अभ्यास करें
8प्र: I have three eyes but only one leg. I still close one even if you beg. What am I? 1450 05b5cc69de4d2b4197774c923
5b5cc69de4d2b4197774c923- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
A traffic light. It has three 'eyes' (the red, orange and green lights) and the leg is the pole holding it up. Many people beg the light to stay green as they’re approaching.
प्र: What is a Contact Force and explain with an example? 1435 05b5cc6a3e4d2b4197774cc1f
5b5cc6a3e4d2b4197774cc1f- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
A Contact force is a force applied to a body by another body that is in contact with it. Contact force acts on a point of direct contact between the two objects. This force can either be continuous as a continuous force or can be momentary in the form of an impulse. Contact force is governed by Newton’s Laws. Examples :: Contact force is responsible for most of the interactions we experience in the daily life. 1. Writing your name with a pen, pushing a car up a hill, lifting an object, etc... 2. Kicking a ball, hammering a nail, etc... are some of the everyday examples where contact forces are at work. In the first case, the force is continuously applied by the person on the car or pen or an object while in the second case the force is delivered in a short impulse. Contact forces are often decomposed into orthogonal components one perpendicular to the surface in contact called the normal force, and one parallel to the surface in contact, called the friction force.
प्र: A man has only 20-paise and 25-paise coins in a bag. If he has 50 coins in all totaling to Rs.10.25, then the number of 20-paise coins is 1426 05b5cc73ae4d2b4197774f8c4
5b5cc73ae4d2b4197774f8c4- 142false
- 245true
- 338false
- 436false
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उत्तर : 2. "45"
व्याख्या :
Answer: B) 45 Explanation: Let number of 20 ps coins = x and number of 25 ps coins = y Given total coins in the bag = 50 x + y = 50.......(1) But the total money in the bag = Rs. 10.25 0.20x + 0.25y = 10.25 20x + 25y = 1025.........(2) Now multiplying (1) by 25 we get 25x+25y=1250.............(3) By solving (2) and (3) 20x + 25y = 1025; => x = 45; Then, the no. of 20 ps coins are 45.
प्र: Brightness of bulb depends on voltage or current? 1422 05b5cc68be4d2b4197774c390
5b5cc68be4d2b4197774c390- 1Currentfalse
- 2Voltagefalse
- 3Both A & Btrue
- 4Nonefalse
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उत्तर : 3. "Both A & B"
व्याख्या :
Answer: C) Both A & B Explanation: Brightness of bulb depends on both voltage and current. The brightness depends on power. Since we know that Power (P) = Voltage x Current = V I So whether you increase the current or the voltage the brightness will increase. Example Illustration: If you connect a long bulb and a round bulb in series, the long bulb glows but the round bulb does not. Both of them have the same current flowing through them (they are in series) but the long bulb has a greater voltage across it because it has more resistance (even though V= IR is not obeyed exactly, voltage drop does depend on the resistance). If you connect a round bulb and a long bulb in parallel, however, it is the round bulb that is brighter because now the voltage across both bulbs is the same but the current is larger through the round bulb (smaller resistance). Hence, the brightness of a bulb depends on power i.e, both voltage and current.
प्र: If you had the chance to start your career over again, what would you do differently ? 1405 05b5cc761e4d2b4197774fd3e
5b5cc761e4d2b4197774fd3e- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
This depends on several factors. Different Individuals have different answers for it.You can answer as - " I will most likely be involved in a different but still related career path; something to do with the creative side. If I were to start over I would attempt to get myself to specialize in one area as a young man. It’s very interesting to follow one’s interests all at the same time, but you don’t get anywhere very quickly this way. By pursuing lots of interests all at the same time, it takes a long, long time to acquire professional level skills."
प्र: One boat is overtaking another. Which boat must give way? 1389 05b5cc67be4d2b4197774c214
5b5cc67be4d2b4197774c214- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
The boat which is overtaken must give way to the boat which is overtaking.
प्र: 5 L from A are V? 1374 05b5cc655e4d2b4197774bd6f
5b5cc655e4d2b4197774bd6f- उत्तर देखेंउत्तर छिपाएं
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उत्तर :
व्याख्या :
5 L from A are V means 5 Letters from Alphabet are Vowels. Some more of that are: 1. 7 W of the W : 7 wonders of the world. 2. 5 T on a F : 5 toes on a foot. 3. 12 S of the Z : 12 signs of the zodiac. 4. 90 D in a R A 5. 9 P in SS
प्र: Find at what time between 9 and 10 o’clock will the hands of a clock be in 180° ? 1353 05b5cc6f8e4d2b4197774f07c
5b5cc6f8e4d2b4197774f07c- 1180/14 min past 10false
- 2180/11 min past 9true
- 3148/7 min past 10false
- 4154/11 min past 9false
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उत्तर : 2. "180/11 min past 9"
व्याख्या :
Answer: B) 180/11 min past 9 Explanation: At 9 o’clock, the hour hand is at 9 and the minutes hand is at 12, i.e., the two hands are 15 min. spaces apart.So, the minute hand should gain = (30 - 15) minutes = 15 minutes55 minutes will be gained in 60 min.15 minutes spaces will be gained in ((60/55) x 15) min. = 180/11 min.The hands will be in the same straight line but not together i.e.,in 180 degrees at 180/11 min. past 9.

