GATE Practice Question and Answer
8Q: Which of the following is not a transverse wave? 1818 05b5cc6a9e4d2b4197774cf24
5b5cc6a9e4d2b4197774cf24- 1Light wavesfalse
- 2Radio wavesfalse
- 3Sound wavestrue
- 4All the abovefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "Sound waves"
Explanation :
Answer: C) Sound waves Explanation: Light and Radio waves are both different frequency/wavelengths of electromagnetic radiation, which consists of two components electric and magnetic of perpendicular, transverse waves. Sound, on the other hand, is a longitudinal wave which oscillates parallel to it's medium (back and forth instead of up and down).
Q: Which liquid is the most viscous? 1815 05b5cc6abe4d2b4197774d016
5b5cc6abe4d2b4197774d016- 1Waterfalse
- 2Dieselfalse
- 3Milkfalse
- 4Oiltrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Oil"
Explanation :
Answer: D) Oil Explanation: Here Oil is the most viscous liquid. The liquid with the most intermolecular force is high viscous. viscosity is how smoothly a liquid flows and how hardly the liquid flows it is highly viscous.
Q: The calendar for the year 1988 is same as which upcoming year ? 1814 05b5cc6cfe4d2b4197774e2e3
5b5cc6cfe4d2b4197774e2e3- 12012false
- 22014false
- 32016true
- 42010false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "2016"
Explanation :
Answer: C) 2016 Explanation: We already know that the calendar after a leap year repeats again after 28 years. Here year 1988 is a Leap year, then the same calendar will be in the year = 1988 + 28 = 2016.
Q: If rupee two produces rupees eleven over a period of 30 years, find the rate of simple interest ? 1814 05b5cc6e2e4d2b4197774ec7f
5b5cc6e2e4d2b4197774ec7f- 117.25 %false
- 218.14 %false
- 318.33 %true
- 417.35 %false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "18.33 %"
Explanation :
Answer: C) 18.33 % Explanation: We know that I = PTR/100 11 = (2x30xR)/100 R = 18.333 %
Q: What is the maximum velocity with which a body of mass 'm' must enter a vertical loop of radius 'R'so that it can complete the loop? 1814 05b5cc6f1e4d2b4197774ef91
5b5cc6f1e4d2b4197774ef91- 10false
- 2gRfalse
- 32gRfalse
- 45gRtrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "5gR"
Explanation :
Answer: D) D Explanation: To complete the vertical loop, the minimum speed required at the lowest point = 5gR.
Q: Simple interest on a certain sum at 7% per annum for 4 years is Rs. 2415. What will be the compound interest on the same principal at 4% per annum in two years? 1811 05b5cc6a7e4d2b4197774ce22
5b5cc6a7e4d2b4197774ce22- 1Rs. 704true
- 2Rs. 854false
- 3Rs. 893false
- 4Rs. 914false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Rs. 704"
Explanation :
Answer: A) Rs. 704 Explanation: We know that, S.I. = PTR100⇒ P = S.I x 100T x RAnd also,C.I = P1 + R100n- 1 From given data, P = Rs. 8625 Now, C.I = 86251+41002-1= 862526252-1= 8625676625-1= 8625 x 51625C.I = Rs. 703.80
Q: What is the gram formula mass of Li2SO4? 1811 05b5cc67be4d2b4197774c1d1
5b5cc67be4d2b4197774c1d1- 1101.2487false
- 2109.9446true
- 3111.2687false
- 4106.5871false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "109.9446"
Explanation :
Answer: B) 109.9446 Explanation: The term gram formula mass is synonymous with molecular mass. So, to get this, we must add molar mass of all the elements in this compound. Given compound is Lithium Sulphate - Li2SO4 Elemental calculation :: Li - Lithium - 6.941 - 2 - 13.88200 %S - Sulfur - 32.065 - 1 - 32.065 %O - Oxygen - 15.9994 - 4 - 63.9976 % Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446 Hence, the gram formula mass of Li2SO4 = 109.9446.
Q: Train K crosses a pole in 30 seconds and train L crosses the same pole in one minute and 20 seconds. The length of train K is three-fourths the length of train L. What is the ratio of the speed of train K to that of train L ? 1811 05b5cc6e0e4d2b4197774eb39
5b5cc6e0e4d2b4197774eb39- 11 : 3false
- 22 : 1true
- 33 : 1false
- 41 : 2false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "2 : 1"
Explanation :
Answer: B) 2 : 1 Explanation: Given that train K crosses a pole in 30 seconds and train L crosses the same pole in one minute and 15 seconds. Let the length of train K be Lk and that of train L be Ll given that Lk = 3/4 Ll As the train K and L crosses the pole in 30 seconds and 80 seconds respectively, => Speed of train K = sk = Lk/30 Speed of train L = sl = Ll/80 Lk = 3/4 Ll => sk = 3/4 Ll/(30) = Ll/40 Ratio of their speeds = sk : sl = Ll/40 : Ll/80 => 1/40 : 1/80 = 2 : 1