List of top Questions asked in Bihar Board X - 2023

Define focus of a concave spherical mirror. Prove that in a concave mirror \( R = 2f \).
What is the law of refraction of light?
What do you understand by 'short-circuit'?
How is the resistance of a wire affected by its area of cross-section?
Explain conductor, insulator, and semiconductor with examples.
What do you mean by power of a lens? Write its SI unit.
What is a simple microscope? Draw its ray diagram.
What is persistence of vision?
Which of the following equations is balanced?
CaCO\(_3\)(s) → CaO(s) + CO\(_2\)(g) is what type of reaction?
Draw a labelled diagram of an electric bulb.
Which of the following causes acid rain in industrial areas?
Draw a ray diagram to show refraction of light at both refractive surfaces of a prism placed in air.
Which one of the following is a metalloid?
Which one of the following is the natural source of oxalic acid?
Ozone layer protects earth from which harmful radiation?
If the lower half of a concave mirror gets broken, then the image:
Which non-metal is found in liquid state at room temperature?
Propane, with the molecular formula \( C_3H_8 \), has:
When a ray of light travels from air (a rarer medium) to glass (a denser medium), it bends:
The far point for normal vision is:
Which colour of light scatters more in the atmosphere?
The general formula of alkyne is:
Converging lens in air is:
A ray of light is incident perpendicular to a plane mirror. The angle of reflection will be: