Q2241. Who propounded the universal law of gravitation?
A Newton
B Galileo
C Copernicus
D Einstein
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Correct answer: Newton
Q2242. Consider the following statements. A 4-wheel vehicle moving in a sharp circular path at high speed will 1. Overturn about its outer wheels 2. Overturn about its inner wheels 3. Skid outwards 4. Skid inwards Which of these statements are correct?
A 1 and 3
B 2 and 4
C 2 and 3
D 1 and 4
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Correct answer: 2 and 3
Q2243. Consider the following statement and conclusions which can be drawn from it. Choose the correct conclusion. Statement: In starting a loaded cart, one has to push harder than to keep it moving. Conclusion
A The weight of a moving object is less
B The wheels tend to slip initially
C There is less friction once the cart starts moving
D Practice makes perfect
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Correct answer: There is less friction once the cart starts moving
Q2244. Assertion (A): A man standing on a completely frictionless surface can propel himself by whistling. Reason (R): If no external force acts on a system, its momentum cannot change. Code
A Both (A) and (R) are true and (R) is the correct explanation of
B Both (A) and (R) are true, but (R) is not the correct explanation of (A)
C (A) is true, but (R) is false
D (A) is false, but (R) is true
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Correct answer: Both (A) and (R) are true, but (R) is not the correct explanation of (A)
Q2245. What is the correct equation for finding the acceleration?
A a = v u t −
B a = u + vt
C a = v u t +
D a = v u +
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Correct answer: a = v u t −
Q2246. An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil, then
A remains horizontal
B is inclined to the horizontal with smaller depth at the rear end
C is inclined to the horizontal with larger depth at the rear end
D assumes parabolic curve
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Correct answer: assumes parabolic curve
Q2247. A person is sitting in a car which is at rest. The reaction from the road at each of the four wheels of the car is R. When the car runs on a straight level road, how will the reaction at either of the front wheels vary?
A It will be greater than R
B It will be less than R
C It will be equal to R
D It shall depend on the material of the road
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Correct answer: It will be less than R
Q2248. A truck, a car and a motorcycle have equal kinetic energies. If equal, stopping forces are applied and they stop after travelling a distance of X, Y and Z respectively, then
A X > Y > Z
B X < Y < Z
C X = Y = Z
D X ≅ 4Y ≅ 8Z
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Correct answer: X = Y = Z
Q2249. A man jumped at a speed of 5 metre per second from a stationary boat and the boat moved off with the speed of 0.5 metre per second. How many times is the mass of the boat greater than that of the man?
A 5.5 times
B 4.5 times
C 2.5 times
D 10 times
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Correct answer: 10 times
Q2250. It is difficult to walk on the ice than on the road because
A Ice is harder than the road
B Road is harder than the ice
C Ice does not offer any reaction when we push it with our foot
D Ice has a lesser friction than the road
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Correct answer: Ice has a lesser friction than the road
Q2251. As the train starts moving, the head of the passenger sitting inside leans backward because of
A Inertia of Rest
B Inertia of Motion
C Moment of Inertia
D Conservation of Mass
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Correct answer: Inertia of Rest
Q2252. In wind power, which form of energy is converted into electrical energy?
A Kinetic energy
B Potential energy
C Solar energy
D Radiant energy
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Correct answer: Kinetic energy
Q2253. The energy of wind is
A Only potential
B Only kinetic
C Electrical
D Potential and kinetic both
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Correct answer: Only kinetic
Q2254. Energy conservation means
A Generation and destruction of energy
B Energy could be created
C Energy could not be created but destroyed
D Energy can neither be created nor destroyed
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Correct answer: Energy can neither be created nor destroyed
Q2255. If the number representing volume and surface area of a cube are equal, then the length of the edge of the cube in terms of the unit of measurement will be
A 3
B 4
C 5
D 6
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Correct answer: 6
Q2256. Force is the product of
A Mass and velocity
B Mass and acceleration
C Weight and velocity
D Weight and acceleration
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Correct answer: Mass and acceleration
General Science
English
Himachal Pradesh PSC (Pre) 2019 45th BPSC (Pre) 2001
Q2257. Which physical quantity is represented by the ratio of momentum and velocity of the body?
A Velocity
B Acceleration
C Mass
D Force
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Correct answer: Mass
Q2258. Which one of the following is a vector quantity?
A Momentum
B Pressure
C Energy
D Work
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Correct answer: Momentum
Q2259. Which of the following is a vector quantity?
A Time
B Speed
C Displacement
D Distance
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Correct answer: Displacement
Q2260. A man is standing on a sensitive balance. If he inhales deeply, the reading of the balance
A Increases
B Decreases
C Remains unaffected
D May increase or decrease depending on the atmospheric pressure
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Correct answer: Increases