# SOF - NSO Level 2 Sample Papers for Class 10

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Class 10 sample paper & practice questions for the level 2 of National Science Olympiad (NSO) are given below. Syllabus for level 2 is also mentioned for these exams. You can refer these sample paper & quiz for preparing for the exam. Q.1 Q.2 Q.3 Q.4 Q.5 Q.6 Q.7 Q.8 Q.9 Q.10
 Q.1 A man with myopic eyes cannot see objects at a distance of more than 60 cm from his eyes. Find the power of the lens to be used. a) - 1.66 D b) + 60 D c) - 60 D d) 1/1.66 D
 Q.2 The ratios of wire A and wire B respectively are: Length LA/Length LB = 5/18 Diameter DA/Diameter DB = 2/3 Resistivity PA/Resistivity PB = 4/9 Calculate the ratio of the resistance of wire A and wire B. a) 5:8 b) 10:54 c) 18:5 d) 54:10
 Q.3 A man suffering from myopia cannot see the objects distinctly at a distance greater than 2 m. Which lens is required to correct the defect? a) -2 D b) + 2 D c) - 0.5 D d) + 0.5 D
 Q.4 Which of the following results when there is an increase in the population of sharks? Plankton → Fish → Seal → Shark a) A decrease in the population of seals b) A decrease in the population of fish c) An increase in the population of seals d) An increase in the population of plankton
 Q.5 The difference between an AC and DC generator is __________. a) An AC generator has a commutator and a DC generator has slip rings b) AC generator has slip rings and a DC generator has a commutator c) AC generator rotates only in one direction d) The polarity of the current changes for every half rotation in a DC generator
 Q.6 What is the effective resistance between P and Q in the circuit shown below? a) 0.15 Ω b) 0.66 Ω c) 1.5 Ω d) 1.75 Ω
 Q.7 Two resistors of 4 Ω and 6 Ω are connected in parallel with a 6 V battery of negligible resistance. Calculate the current flowing through the battery. a) 1A b) 1.5 A c) 2 A d) 2.5 A
 Q.8 The power of a lens is + 2.5 D. What kind of lens is it and what is its focal length? a) Concave lens, 100 cm b) Concave lens, 40 cm c) Convex lens, 40 cm d) Convex lens, 50 cm
 Q.9 A soft iron bar is introduced inside a current carrying solenoid. What happens to its magnetic field? a) It will become zero b) It will decrease c) It will increase d) It will remain the same
 Q.10 Which of the following occurs due to the weakening of the ciliary muscles and diminishing flexibility of the eye lens? a) Myopia b) Hypermetropia c) Presbyopia d) Astigmatism