Railway/SSC JE 2019 Physics quiz for Phase I and other railways exams 21/02/2019

Railway/SSC JE 2019 Physics quiz for Phase I

Railway/SSC JE physics quiz for  (Phase I), RRB NTPC, SSC various exams and other competitive exams.

Q1. Acceleration due to gravity on a planet decreases with ______.

(a) decrease in radius of the planet

(b) increase in mass of the planet

(c) decrease in mass of the body

(d) increase in altitude from surface of the planet

Q2. Instrument for measuring wind velocity is called –

(a) Coulombmeter

(b) Anemometer

(c) Cyanometer

(d) Chronometer

Q3. Who was the first Indian astronaut to travel in space?

(a) Rakesh Sharma

(b) Ravish Malhotra

(c) Kalpana Chawla

(d) Sheikh Muszaphar Shukor

Q4. AV= constant, where A= area of cross-section and V= velocity of fluid. This equation is called _____.

(a) Equation of discontinuity

(b) Equation of continuity

(c) Equation of sustenance

(d) Equation of parallelism

Q5. A body in equilibrium _______.

(a) can move with constant acceleration

(b) is always at rest

(c) can move with constant velocity

(d) can move with variable acceleration

Q6. What is the viscosity of an ideal fluid?

(a) Equal to its mass

(b) Equal to its weight

(c) Zero

(d) One

Q7. A parachute descends slowly whereas a stone dropped from the same height falls rapidly, because –

(a) Stone is heavier than parachute

(b) Special mechanisms are present in parachute

(c) A parachute has a larger surface area and air resistance is more

(d) None of the above

Q8. Shaving mirror is – 

(a) Convex

(b) Concave

(c) Plane

(d) Parabolic

Q9. The spoon dropped by an astronaut in a satellite will –

(a) Fall to the floor

(b) Remain stationary

(c) Continue to follow the motion of the satellite

(d) Move tangentially away

Q10. “Curie” is the unit of –

(a) Radioactivity

(b) Temperature 

(c) Heat

(d) Energy

Solution

Ans.1.(d)

Exp. Acceleration due to gravity on a planet decreases with increase in altitude from surface of the planet.

Ans.2.(b)

Exp. An anemometer is a device used for measuring the speed of wind.

Ans.3.(a)

Exp. Rakesh Sharma was the first Indian to travel in Space. He was born on 13th January 1949 in Punjab, India. He flew to the Salyut 7 Space Station.

Ans.4.(b)

Exp. According to the equation of continuity Av = constant. Where A =cross-sectional area and v=velocity with which the fluid flows. It means that if any liquid is flowing in streamline flow in a pipe of non-uniform cross-section area, then rate of flow of liquid across any cross-section remains constant.

Ans.5.(c)

Exp. A body which is in equilibrium is either moving at constant velocity in a straight line, or it is not moving.

Ans.6.(c)

Exp. The viscosity of an ideal fluid is Zero.

Ans.7.(c)

Exp. A parachute descends slowly because it has a larger surfaace area and air resistance is more.

Ans.8.(b)

Exp. Concave mirror is used as Shaving mirror.

Ans.9.(c)

Exp. The spoon dropped by an astronaut in a satellite will continue to follow the motion of the satellite.

Ans.10.(a)

Exp. The Curie (symbol Ci) is a non-SI unit of radioactivity.

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