List of top Science Questions

If the electric current passing through a fixed resistor is halved, then the heat produced in it will become
The blue colour of the sky is due to the
The refractive index of glass is 1.5. The speed of light in air is \(3 \times 10^8\) m/s. The speed of light in glass will be
The unit of power of a lens is
Write a note on the following:
(i) Gregor Johann Mendel
(ii) Reflex arc
(i) What are Exothermic and Endothermic reactions? Explain with example.
Write a note on the following:
(i) Spore formation in Rhizopus
(ii) Seed germination
(ii) Write chemical reaction for manufacture of bleaching powder and its two applications.
Write a short note on the following:
(i) Importance of pH in daily life
(ii) Micelle
(iii) Metals and Non-metals
What are the trophic levels? Give an example of a food chain and state the different trophic levels in it.
Describe co-ordination in plants with examples.
Describe the digestive system of human with diagram.
(i) Draw magnetic lines of force due to a current carrying solenoid.
ii) Write IUPAC names for the following compounds:
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(ii) Why fuse is used in domestic electrical circuits?
(i) Explain Corrosion. Write its two examples.
(iii) State the law to find the direction of magnetic field produced due to straight current carrying wire.
(i) Mention any two properties of magnetic field lines.
(ii) Mention two factors which affect the magnetic field produced by a straight current carrying conductor.
(ii) What do you understand by the heating effect of electric current? In a heater of resistance \(10 \, \Omega\), a current of \(15 \, \text{A}\) is flowing for 30 minutes. What will be the amount of heat produced in the heater?
(i) Clarify the meaning of power of accommodation of eye lens of human eye. Where is the image formed by the eye lens?
(i) State Ohm's law. What will be the value of current and potential difference at the ends of each resistance in the given circuit?
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Which of the following is an animal hormone?
Chlorophyll is important
Which of the following is top carnivore?