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#1 Class 10 Science Magnetic Effects of Electric Current 2026 Long 5M CBSE

(i) State the rule which gives the direction of force acting on a current-carrying conductor placed in a magnetic field. (ii) What is a fuse ? Why is it called a safety device ? (iii) Why are electrical appliances wit...

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#2 Class 10 Science Electricity 2026 Long 5M CBSE

(i) Draw a schematic diagram of a domestic electric circuit which includes the following devices : (I) A fuse (II) A power meter (III) One light point (IV) A power plug (ii) Why is it necessary to connect an earth wir...

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#3 Class 10 Science Magnetic Effects of Electric Current 2026 Long 5M CBSE

(i) The magnetic field lines due to two bar magnets X and Y are shown in the given diagram. If the magnet X is displaced towards magnet Y, will there be repulsion or attraction between them ? Justify. (ii) A metallic ...

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#4 Class 10 Science Electricity 2026 Long 4M CBSE

Read the following passage and answer the questions that follow : Swati, a class 10 student, observes that when she passes close to the refrigerator in her kitchen, she feels the heat, although the things kept inside ...

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#5 Class 10 Science Electricity 2026 Short 3M CBSE

The values of current $I$ flowing in a given resistor for the corresponding values of potential difference $V$ applied across the ends of the resistor are given below in the table : $I$ (Amperes) 0.4 0.8 1.2 1.6 2.0 $...

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#6 Class 10 Science 2026 Short 3M CBSE

What is scattering of light ? How is scattering of light different from reflection of light ? Explain.

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#7 Class 10 Science Light - Reflection and Refraction 2026 Short 3M CBSE

In the given ray diagram a ray AO strikes a plane mirror at O making an angle of $40^\circ$ WITH THE MIRROR SURFACE and is reflected along OB. (a) State the laws which help to find out the angle of incidence and angle...

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#8 Class 10 Science Light - Reflection and Refraction 2026 Short 3M CBSE

(a) Write the expression for the magnification produced by a lens in terms of object distance and image distance. (b) A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 2...

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#9 Class 10 Science Light - Reflection and Refraction 2026 Short 3M CBSE

(a) Write the name of the lens and position of the object in front of it so that a virtual and magnified image is formed. (b) An object is placed perpendicular to the principal axis of a convex lens of focal length 20...

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#10 Class 10 Science 2026 Short 2M CBSE

Why is the concave lens used as a corrective lens for a myopic eye ?

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#11 Class 10 Science 2026 Short 2M CBSE

How does the focal length of eye lens change as the distance of the object from the eyes is altered ? Explain.

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#12 Class 10 Science Light - Reflection and Refraction 2026 Short 2M CBSE

In the given ray diagram, a ray AO travelling in Medium 1 is refracted at O into Medium 2 along OB, and the refracted ray OB makes an angle of $60^\circ$ WITH THE SURFACE. Use the ray diagram to calculate the angle of...

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#13 Class 10 Science Light - Reflection and Refraction 2026 Short 2M CBSE

In the given ray diagram, a ray AO in Medium 1 strikes the boundary at O making an angle of $30^\circ$ with the surface, and the refracted ray OB makes an angle of $30^\circ$ with the normal N in Medium 2. With the he...

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#14 Class 10 Science Light - Reflection and Refraction 2026 Short 2M CBSE

In the given ray diagram a ray AO travelling in Medium 1 strikes the surface separating Medium 1 and Medium 2 at O, making an angle of $30^\circ$ WITH THE SURFACE, and is refracted along OB into Medium 2. Calculate th...

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#15 Class 10 Science Magnetic Effects of Electric Current 2026 Long 1M CBSE

Assertion (A) : Direction of force exerted on a current-carrying conductor placed in a magnetic field remains same if the directions of both magnetic field and current flowing through the conductor are reversed. Reaso...

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#16 Class 10 Science 2026 Mcq 1M CBSE

A thin beam of white light falls on a face of a glass prism and a spectrum is obtained on a screen. Which of the following options is the correct sequence of colours from top to bottom on the screen ?

A. Red, Green, Yellow, Violet, Blue

B. Red, Yellow, Green, Blue, Violet

C. Violet, Blue, Green, Yellow, Red

D. Violet, Red, Green, Yellow, Blue

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#17 Class 10 Science Light - Reflection and Refraction 2026 Mcq 1M CBSE

From the following options choose the one which gives negative magnification greater than one :

A. Concave mirror; Nature of image - real

B. Concave mirror; Nature of image - virtual

C. Convex mirror; Nature of image - real

D. Convex mirror; Nature of image - virtual

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#18 Class 12 Physics Ray Optics and Optical Instruments 2023 Long 5M CBSE

(i) Two thin converging lenses of focal lengths $f_1$ and $f_2$ are placed coaxially in contact. Derive the expression for the focal length of the combination. (ii) A beam of coherent light of wavelength 550 nm is inc...

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#19 Class 12 Physics Ray Optics and Optical Instruments 2023 Long 5M CBSE

(i) A point object is kept in front of a convex spherical surface of radius of curvature R. Draw the ray diagram to show image formation and derive the relation between object distance (u) and image distance (v) in te...

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#20 Class 12 Physics Electromagnetic Induction 2023 Long 5M CBSE

(i) State Lenz's law and explain that it follows the law of conservation of energy. (ii) Write the dimensional formula for self-inductance. The current in a coil changes from 8.0 A to 2.0 A in 0.6 s. If the average em...

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