The process of splitting of a heavy nucleus into small nuclei is known as _____.
Answer: nuclear fission Explanation: Nuclear fission is the process of splitting of a heavy nucleus into smaller nuclei. The fission... View Article
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Solar power plant uses
Concave mirrors are used to concentrate sun rays.
Surface tension has dimensions of
It has a dimension of force per unit length. Surface tension is given as: \(\begin{array}{l}Surface\;tension=\frac{Force}{Length}\end{array} \) Dimension of force =... View Article
Which among the following statements is not true for liquids?
A liquid has a definite volume at a particular temperature.
The meniscus of water is
The meniscus of water is concave as the forces of adhesion between water molecules and glass are stronger than forces... View Article
Which among these is not true for a solid?
It is hard to break solids as the molecules attract each other with a strong force.
A conducting wire is moving towards right in a magnetic field B. The direction of induced current in the wire is shown in the figure. The direction of magnetic field will be
According to Fleming right hand rule, the direction of B will be perpendicular to the plane of paper and act downward.
Which one of the following is not a fossil fuel? (1) Coal (2) Oil (3) Natural Gas (4) Biogas
Answer: (4) Biogas Fossil fuels are derived from decomposing plants and animals. Coal, oil and natural gas are examples of natural... View Article
Electric nerve pulses from the retina to brain are conveyed by
Electric nerve signals are conveyed by optic nerves to the brain.
The combination responsible for admitting different amounts of light into eye is
The pupil regulates the amount of light that enters the eye, and the Iris controls the size of the pupil.... View Article
The human eye forms the image of an object at its
The human eye forms the image of an object at its retina. Retina acts as a screen for forming the... View Article
As we increase the distance of an object from the eye, the image distance:
The image distance of an eye remains same as the change in distance of object is compensated by change in... View Article
What percentage of incident radiation do black surfaces absorb?
The surface that absorbs all radiant energy that falls on it is known as a black body. The incident visible... View Article
One pascal is the pressure generated by
One pascal is the pressure generated by force of 1 N on 1 m2.
Fill in the Blank
One atmospheric pressure is _____ kPa. Answer: One atmospheric pressure is 101.325 kPa. Explanation: Atmospheric pressure also called barometric pressure is the pressure within... View Article
If the surface is between two liquids, then the tension between the surface is called
It is called interface tension Interfacial tension is defined as the tendency where an interface becomes spherical to make its... View Article
Which among these is not an element according to indian philosophers?
Tezaab is not an element, it is Tejas.
Which is the main constituent of bio-gas ?
The main constituent of Bio-gas is methane. Biogas is a type of biofuel that is naturally produced from the decomposition... View Article
How do mosquitoes stand on water?
When mosquitoes stand on water, their feet create a dimple in the water and the surface tension of the water... View Article
Fill in the Blanks
Something that cannot be divided are called _____. Answer: indivisible numbers Explanation: Inidivisible numbers are those numbers that cannot be... View Article
