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19,882 Questions
#1 Class 10 Science Electricity 2026 Short 5M CBSE
(i) How much electric current will an electric iron draw from 220 V source if the resistance of its heating element when hot, is $55\ \Omega$? Calculate the power consumed by the electric iron when it is operated at 2...
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#2 Class 10 Science Electricity 2026 Short 5M CBSE
[Figure: A 12 V battery with a key K and an ammeter A in the main circuit. Starting from the battery, the current 2.0 A passes first through a resistor $R_1$, then through a parallel combination of a $4.0\ \Omega$ res...
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#3 Class 10 Science Light - Reflection and Refraction 2026 Long 4M CBSE
Read the following passage and answer the questions that follow: [Figure: Ray diagram of a reflecting telescope - parallel light rays from a distant star fall on a large curved mirror, are reflected onto a small plane...
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#4 Class 10 Science Magnetic Effects of Electric Current 2026 Short 3M CBSE
[Figure: A horseshoe magnet with pole S above and pole N below; an aluminium rod AB is suspended horizontally from a stand by two connecting wires so that it lies between the poles of the magnet. The wires are connect...
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#5 Class 10 Science 2026 Short 3M CBSE
Explain the phenomenon of rainbow formation in the sky. Draw the labelled ray diagram in support of your explanation.
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#6 Class 10 Science Light - Reflection and Refraction 2026 Short 3M CBSE
[Figure: A ray of light travelling in medium 'A' strikes the surface of a rectangular block of medium 'B' at an angle of incidence i, is refracted at an angle r (with r less than i), travels through B and passes out f...
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#7 Class 10 Science Electricity 2026 Short 2M CBSE
(a) Define volt, the unit of potential difference. (b) Calculate the work done required to move an electron between two points A and B located at a potential difference of 100 V in an electric field.
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#8 Class 10 Science Magnetic Effects of Electric Current 2026 Short 2M CBSE
How is an electromagnet made? Write any two ways by which the strength of electromagnet can be increased.
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#9 Class 10 Science Electricity 2026 Short 2M CBSE
A fuse in electric circuit is rated 4 A. Can it be used with an electric heater of rating 2 kW, 200 V? Explain your answer.
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#10 Class 10 Science Magnetic Effects of Electric Current 2026 Long 1M CBSE
Assertion (A): With the help of compass, magnetic field lines can be traced outside the bar magnet. Reason (R): The north pole of a compass needle always points towards the south pole of the magnet when brought close ...
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#11 Class 10 Science 2026 Mcq 1M CBSE
The vision defect which arises due to gradual weakening of the ciliary muscles and diminishing flexibility of eye lens is:
A. Myopia
B. Hypermetropia
C. Presbyopia
D. Myopia and hypermetropia both
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#12 Class 10 Science 2026 Mcq 1M CBSE
The pair of eye parts responsible for admitting different amount of light in to the eyes is:
A. Iris and pupil
B. Ciliary muscles and pupil
C. Retina and Iris
D. Ciliary muscles and cornea
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#13 Class 10 Science How do Organisms Reproduce? 2026 Long 5M CBSE
Attempt either (a) or (b) : (a) Observe the given diagram and answer the questions that follow : [Figure: A leaf of Bryophyllum showing a marginal notch, an adventitious bud in the notch and a young plant developing f...
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#14 Class 10 Science Life Processes 2026 Long 4M CBSE
Read the following passage and answer the questions that follow : Not all plants carry out photosynthesis by the same mechanism. In most plants, it depends directly on gaseous carbon dioxide that diffuses into the lea...
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#15 Class 10 Science Heredity 2026 Short 3M CBSE
A blue colour flower (BB) bearing plant is crossed with a plant with white coloured flowers (bb). (a) State the colour of the flowers you would expect in their $F_1$ progeny. (b) What must be the percentage of white f...
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#16 Class 10 Science Life Processes 2026 Short 3M CBSE
In xylem tissue, vessels and tracheids of the roots, stems and leaves are interconnected to form a continuous system of water-conducting channels reaching all parts of the plant. Explain how this is achieved.
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#17 Class 10 Science Life Processes 2026 Short 3M CBSE
Give reasons for the following : (a) Herbivores have a longer small intestine. (b) Inner lining of small intestine has numerous finger-like projections. (c) Rate of breathing in aquatic organisms is much faster than t...
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#18 Class 10 Science Heredity 2026 Short 3M CBSE
Show the cross and observations made by Mendel when he crossed pure tall pea plant with a pure short pea plant to get $F_1$ progeny.
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#19 Class 10 Science Our Environment 2026 Short 2M CBSE
In the following food chain, 5 J of energy is available to man. Calculate, how much energy was available at the producer level. Why ? $$\text{Plant} \rightarrow \text{Goat} \rightarrow \text{Man}$$
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#20 Class 10 Science Life Processes 2026 Short 2M CBSE
Separation of right side and left side of the heart is useful to keep oxygenated and deoxygenated blood from mixing. Various organisms have different types of heart. (I) Fill in the blanks (i) to (iii) correctly accor...
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