Pair of Linear Equations in Two Variables A pair of linear equations in two variables can be represented as:a) ax2+by+c=0ax^2 + by + c = 0 b) ax+by+c=0ax + by + c = 0 c) ax3+by2+c=0ax^3 + by^2 + c = 0 d) None of theseAnswer: b The graphical representation of a pair of […]
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Polynomials A polynomial of degree 1 is called:a) Linear polynomialb) Quadratic polynomialc) Cubic polynomiald) None of theseAnswer: a A polynomial of degree 2 is called:a) Linear polynomialb) Quadratic polynomialc) Cubic polynomiald) None of theseAnswer: b A polynomial of degree 3 is called:a) Linear polynomialb) Quadratic polynomialc) Cubic polynomiald) None of theseAnswer: c The general
Real Numbers Euclid’s division algorithm helps in determining:a) LCMb) HCFc) Square rootd) Cube rootAnswer: b Which of the following is not a property of real numbers:a) Associativeb) Commutativec) Distributived) ImaginaryAnswer: d Fundamental Theorem of Arithmetic states:a) Every number is a rational numberb) Every composite number can be expressed uniquely as a product of primesc) Prime
Arithmetic Progressions What is the common difference of the AP: 3, 7, 11, 15, …?a) 2b) 3c) 4d) 5Answer: c Which term of the AP: 5, 10, 15, 20, … is 50?a) 5b) 6c) 7d) 10Answer: b Find the 10th term of the AP: 2, 4, 6, 8, …a) 18b) 20c) 22d) 24Answer: b
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Our Environment What is an ecosystem?a) A collection of only animals in a regionb) A system where living and non-living components interactc) A group of planetsd) A process of food productionAnswer: b) A system where living and non-living components interact Which of the following is a natural ecosystem?a) Aquariumb) Gardenc) Pondd) Crop fieldAnswer: c) Pond
Magnetic Effects of Electric Current What happens when an electric current passes through a metallic conductor?a) It produces heatb) It produces lightc) It produces a magnetic fieldd) It produces soundAnswer: c) It produces a magnetic field Which phenomenon demonstrates the relationship between electricity and magnetism?a) Heating effectb) Deflection of compass needlec) Generation of soundd) Flow
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Electricity 1. What is the SI unit of electric current?A) VoltB) AmpereC) OhmD) CoulombAnswer: B) Ampere 2. Which instrument measures electric current in a circuit?A) VoltmeterB) AmmeterC) GalvanometerD) RheostatAnswer: B) Ammeter 3. How does a switch function in an electric circuit?A) Generates electricityB) Opens or closes the circuitC) Increases resistanceD) Decreases voltageAnswer: B) Opens or
The Human Eye and the Colorful World What is the transparent bulge on the front surface of the eyeball called?a) Corneab) Retinac) Irisd) PupilAnswer: a) Cornea What part of the eye controls the size of the pupil?a) Retinab) Corneac) Irisd) Optic nerveAnswer: c) Iris Where is the image formed in the human eye?a) Corneab)
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Light Reflection and Refraction What is the principal focus of a concave mirror?a) The point where parallel rays convergeb) The point where rays divergec) The point where the mirror is curvedd) The center of curvatureAnswer: a) The point where parallel rays converge The radius of curvature of a spherical mirror is 20 cm. What
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Heredity 1. What is heredity?a) The process of creating DNAb) The transmission of traits from one generation to the nextc) The study of living organismsd) The process of asexual reproductionAnswer: b 2. What leads to variations in sexually reproducing organisms?a) Environmental factorsb) DNA copying errorsc) Independent inheritance of traitsd) All of the aboveAnswer: d 3.