Physics - MOST IMPORTANT Executive Operations & BD Previous Year Questions

Practice real questions from previous year exams of Executive Operations & BD.

📘 Work, Energy and Power📚 Work done under different cases

Work done can be ______.
I. zero
II. positive
III. Negative

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I, II and III

Only II and III

Only I and II

Only III and I

📘 Thermodynamics📚 Thermodynamic System- Open system, Closed System, Isolated System

In a ______ system, there is no exchange of matter, but exchange of energy is possible between system and the surrounding.

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isolated

closed

adiabatic

open

📘 Wave📚 Electromagnetic wave- Infrared waves

What is the wavelength range of Infra-red waves?

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$\displaystyle 1$ nm to $\displaystyle 10$ ^- $\displaystyle 3$ mm

$\displaystyle 400$ nm to $\displaystyle 1$ mm

$\displaystyle 1$ mm to $\displaystyle 700$ mm

$\displaystyle 0.1$ m to $\displaystyle 1$ mm

📘 Force and Motion📚 Newton's First Law of Motion

If the net external force on a body is zero, then its acceleration is ______.

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zero

greater than zero

greater than or equal to zero

less than zero

📘 Current Electricity📚 Misc

SI unit of inductive reactance is ______.

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ampere

ohm

volt

mho

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

According to Neils Bohr, electron revolves around the nucleus only in those orbits for which the ______ is some integral multiple of h/2π where h is the Planck’s constant.

🎯 DFCCIL Executive Operations & BD 2023

mass per unit volume

angular momentum

moment of inertia

linear momentum

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