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Physics - MOST IMPORTANT UPPSC RO/ARO Previous Year Questions

Practice real questions from previous year exams of UPPSC RO/ARO.

📘 Thermal Properties of Matter📚 Change of Phase between Gases and Liquids- Vaporization and Condensation

Q1

Given below are two statements, in which one is labelled as Assertion (A) and other as Reason (R) :
Assertion (A) : The boiling point of water decreases as the altitude increases.
Reason (R) : The atmospheric pressure increases with altitude.
Select the correct answer using the code given below :

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

(A) is true but (R) is false.

B.

(A) is false but (R) is true.

C.

Both (A) and (R) are true and (R) is correct explanation of (A).

D.

Both (A) and (R) are true but (R) is not correct explanation of (A).

📘 Current Electricity📚 Resistance, Resistivity and specific resistance

Q2

A voltage of 15 volt is applied across a colour coded carbon resistor with first, second and third rings of brown, green and black colours. What is the current flowing through the resistor?

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

$\displaystyle 3$ ampere

B.

$\displaystyle 2$ ampere

C.

$\displaystyle 1$ ampere

D.

None of the above

📘 Light and Optics📚 Refraction and related Terminology

Q3

The reason for a swimming pool to appear less deep than the actual depth is -

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

Reflection

B.

Light scattering

C.

Refraction

D.

None of the above

📘 Atomic and Nuclear Physics📚 Atoms- Electrons, Protons, Neutrons

Q4

Consider the following events and arrange them in correct chronological order starting from the earliest to the last activity :
I. Discovery of pi meson
II. Discovery of Neutron
III. Discovery of Electron
IV. Discovery of Proton

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

I, III, IV, II

B.

III, II, I, IV

C.

III, IV, II, I

D.

III, IV, I, II

📘 Electrostatics📚 Electric Field

Q5

Given below are two statements, in which one is labelled as Assertion (A) and the other as Reason (R) :
Assertion (A) : A person travelling in a car with closed glass windows and doors is safe form the lightening strike.
Reason (R) : Actually a closed car behaves like a hollow conductor, so charges cannot enter inside the car.
Select the correct answer using the code given below :

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

(A) is false but (R) is true.

B.

Both (A) and (R) are true but (R) is not correct explanation of (A).

C.

Both (A) and (R) are true and (R) is correct explanation of (A).

D.

(A) is true but (R) is false.

📘 Current Electricity📚 Electrical Energy

Q6

15 bulbs each of 200 watt capacity in a Silkyara tunnel are illuminated continuously for 24 hours. The consumption of electricity will be -

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

$\displaystyle 71$ units

B.

$\displaystyle 72$ units

C.

$\displaystyle 73$ units

D.

None of the above

📘 Force and Motion📚 Momentum-II: Conservation of Momentum

Q7

Rocket works on the principle of the following :

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

Energy Conservation

B.

Bernoulli Theorem

C.

Conservation of Momentum

D.

Avogadro's Concept

📘 Mechanical Properties of Solid📚 Elastic Constants- Young Modulus

Q8

With reference to the mechanical properties of solids, which of the following statements is/are correct?

The Young's Modulus of rubber is greater than that of steel.
The stretching of a coil is determined by its Shear Modulus.

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

Only $\displaystyle 2$

B.

Only $\displaystyle 1$

C.

Both $\displaystyle 1$ and $\displaystyle 2$

D.

Neither $\displaystyle 1$ nor $\displaystyle 2$

📘 Units and Dimensions📚 Conversion from one unit to other

Q9

The height of Ramesh is 5 feet. What will be the height of Ramesh in nanometer (nm)?

🎯 UPPSC RO/ARO (Pre) Nirsat Exam-2023 (Ex. Dt. 11.02.2024)

A.

$\displaystyle 152.5$ x $\displaystyle 10$ ^ $\displaystyle 7$ nm

B.

$\displaystyle 152.5$ x $\displaystyle 10$ ^ $\displaystyle 8$ nm

C.

$\displaystyle 152.5$ x $\displaystyle 10$ ^ $\displaystyle 9$ nm

D.

None of the above

📘 Instruments to Measure things📚 List of Instruments to Measure Physical Quantities

Q10

'Ringelmann Scale' is used to measure the density of the following-

🎯 UPPSC RO/ARO (Mains) Exam-2021 (Ex. Dt. 24.04.2022)

A.

fog

B.

noise

C.

polluted water

D.

smoke

📘 Force and Motion📚 Momentum-II: Conservation of Momentum

Q11

Rocket works on which of the following principles?

🎯 UPPSC RO/ARO (Mains) Exam-2021 (Ex. Dt. 24.04.2022)

A.

Avogadro's concept

B.

Energy conservation

C.

Bernoulli's theorem

D.

Momentum conservation

📘 Work, Energy and Power📚 Other types of energy- chemical, mechanical, etc.

Q12

Which of the following is not correctly matched?
(a) Primary Energy - Tidal Power
(b) Commercial Energy - Oil and Gas
(c) Non-Commercial Energy - Animal Dung
(d) Non-Conventional Energy - Solar Energy

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Primary Energy - Tidal Power

B.

Commercial Energy - Oil and Gas

C.

Non-Commercial Energy - Animal Dung

D.

Non-Conventional Energy - Solar Energy

📘 Current Electricity📚 Combination of Resistors (Series and Parallel)

Q13

How two identical bulbs should be connected to get maximum light?
(1) Both are connected in Series
(2) Both are connected in parallel
Select the correct answer using the code given below-

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

In case ( $\displaystyle 1$ ) more

B.

In case ( $\displaystyle 2$ ) more

C.

Same in both ( $\displaystyle 1$ ) and ( $\displaystyle 2$ )

D.

Nothing can be said

📘 Light and Optics📚 Plane Mirrors

Q14

How many letters of the English alphabet (Capitals) appear same when looked at in a mirror?

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

$\displaystyle 9$

B.

$\displaystyle 10$

C.

$\displaystyle 11$

D.

$\displaystyle 12$

📘 Magnetism📚 Magnetism Properties

Q15

Which one of the following is different from the rest of the three?

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Direction

B.

Compass

C.

Needle

D.

Magnet

📘 Sound📚 Human Ear

Q16

Which of the following statement is not correct?

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Human ear becomes most sensitive at $\displaystyle 1000$ Hz.

B.

Human eye becomes most sensitive for red colour.

C.

Persistence of hearing is $\displaystyle 1$ / $\displaystyle 10$ second.

D.

Persistence of vision is $\displaystyle 1$ / $\displaystyle 16$ second

📘 Work, Energy and Power📚 Other types of energy- chemical, mechanical, etc.

Q17

The second most important source after fossil fuels contributing to Indian energy need is-

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Hydropower energy

B.

Wind energy

C.

Nuclear energy

D.

Solar energy

📘 Current Electricity📚 Electric Circuit

Q18

'Electricity' is related to 'wire' in the same way as 'water' is related to-

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Jug

B.

River

C.

Bottle

D.

Pipe

📘 Wave📚 Mechanical Wave: Transverse waves

Q19

In a Sitar, which type of sound vibrations are produced?

🎯 UPPSC RO/ARO (Pre) Exam 2021

A.

Progressive and Longitudinal

B.

Progressive and Transverse

C.

Stationary and Longitudinal

D.

Stationary and Transverse

📘 Modern Physics📚 Semiconductor

Q20

Arrange the following in chronological order as per their discovery and select correct answer from the code given below:

Transistor
Diode
SMD (Surface Mounted Device)
Integrated Circuit (IC)

🎯 UPPSC RO/ARO (Mains) Re-exam 2016

A.

$\displaystyle 1$ , $\displaystyle 2$ , $\displaystyle 3$ , $\displaystyle 4$

B.

$\displaystyle 2$ , $\displaystyle 1$ , $\displaystyle 3$ , $\displaystyle 4$

C.

$\displaystyle 2$ , $\displaystyle 1$ , $\displaystyle 4$ , $\displaystyle 3$

D.

$\displaystyle 1$ , $\displaystyle 3$ , $\displaystyle 2$ , $\displaystyle 4$

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