The condition for the validity of Ohm's law is that the ______...? Mcqs

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The condition for the validity of Ohm's law is that the ______...?

(A) Temperature should remain constant
(B) Current should be proportional to voltage

(C) Resistance must be wire wound type
(D) All of the above

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All accurately known digits and first doubtful digit in an expression are known as...?

(A) Non-significant figures
(B) Significant figures

(C) Estimated figures
(D) Crossed figures

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Refrigerator works on the phenomenon of ________ of heat transfer....?

(A) Conduction
(B) Convection

(C) Radiation
(D) All of these

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Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate
(B) Calcium sulfate

(C) Calcium bicarbonate
(D) None of these

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Which of the following phenomena of light are involved in the formation of a rainbow...?

(A) Refraction
(B) Dispersion

(C) Total internal reflection
(D) All of the above

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In Linnaean classification, the category below the class is...?

(A) Phylum
(B) Order

(C) Family
(D) None of these

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The list that shows electromagnetic waves in order of an increasing wavelength is _____...?

(A) Microwaves, X-rays, Gamma-rays
(B) Microwaves, Gamma-rays, X-rays

(C) X-rays, gamma-rays, Microwaves
(D) Gamma-rays, X-rays, Microwaves

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Which of the following scientific instruments is used to measure the atmospheric pressure...?

(A) Odometer
(B) Barometer

(C) Seismograph
(D) Audiometer

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What are the three subatomic particles of an atom...?

(A) Protons,Neutrons & Electrons
(B) Protons,Nucleus & Electrons

(C) Protons,Nucleus & Elements.
(D) Elements,Nucleus & Protons

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Scientific reasoning based on “if-then” statement called...?

(A) Inductive reasoning
(B) Deductive reasoning

(C) Scientific reasoning
(D) None

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