Which of the following principleis used to produce ‘low-temperatures’ ...? Mcqs

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Which of the following principleis used to produce ‘low-temperatures’ ...?

(A) Super conductivity
(B) Joule-Kelvin effect

(C) Thermo-electric effect
(D) Adiabatic demagneti-sation

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What cells are involved in bone remodeling...?

(A) Osteoblasts
(B) Osteoclasts

(C) Osteocytes
(D) All of these

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Gears can do all of the following except...?

(A) Change speed
(B) Change direction

(C) Change force
(D) Change fulcrum

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Color of the glow produced in the discharge tube:...?

(A) depends on the pressure in the discharge tube
(B) depends on the metal used as cathode

(C) depends on the gas used in the discharge tube
(D) does not depend on the nature of the gas used in the discharge tube

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PVC is obtained by the polymerisation of...?

(A) Propane
(B) Vinyl chloride

(C) Styrene
(D) None of these

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Pumping of blood by the rhythmic pulsation of heart throughout the body is called...?

(A) Blood pressure
(B) Circulation

(C) Pulse
(D) Heart beat

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Which of the following is a positively charged particle emitted by a radioactive element...?

(A) Beta Rays
(B) Alpha Rays

(C) Gamma Rays
(D) None of these

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What force is involved when we rub our hands together to warm them in winter and when we rub a matchstick to ignite it...?

(A) Gravity
(B) Friction

(C) Electromagnetism
(D) Inertia

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The earth is part of a galaxy called...?

(A) Andromeda Galaxy
(B) Triangulum Galaxy

(C) Milky Way Galaxy
(D) Pinwheel Galaxy

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A substance which produces hydrogen ion (H+) in the aqueous solution is called...?

(A) Base
(B) Acid

(C) Oxidizing agent
(D) Reducing agent

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