List of top Science Questions asked in Bihar Board X

An electric motor converts
If a compass is placed near a wire carrying electric current, the compass needle
Faraday made many revolutionary discoveries, including
A horizontal magnet hanging freely in air always comes to rest in
\( \text{CaCO}_3 (s) \rightarrow \text{CaO} (s) + \text{CO}_2 (g) \) is what type of reaction?
When a ray of light travels from air (a rarer medium) to glass (a denser medium), it bends:
If the lower half of a concave mirror gets broken, then the image:
Converging lens in air is:
The far point for normal vision is:
What will be the nature of the image of an object, if magnification of the image is negative?
Which of the following has the lowest refractive index?
A simple prism is bounded by how many surfaces?
Which color of light scatters more in the atmosphere?
A ray of light is incident perpendicular to a plane mirror. The angle of reflection will be:
How many laws are there for reflection of light?
The structural and functional unit of kidney is called:
What should be the minimum speed of wind in a wind electric generator?
A resistor of power \(P_1\) at voltage \(V_1\) is connected in series with another resistor of power \(P_2\) at voltage \(V_2\). The equivalent resistance will be:
A split ring is used in:
The frequency of alternating current in household electric circuits is:
Metallic conduction is based on the motion of which particle in material?
The upper part of a box-type solar cooker has a glass cover. The reason for this is:
The valency of all elements in a group of the periodic table is:
What is the number of elements in the third group of the periodic table?
The electronic configuration of an element is 2, 8, 7. What is the atomic number of the element?