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Which Indian state is the largest exporter of software services?

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Important Questions on Electrostatic Potential and Capacitance

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

A hot filament liberates an electron with zero initial velocity. The anode potential is

1200 V

. The speed of the electron when it strikes the anode is

MEDIUM

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

"India has greater ecosystem diversity than Norway." Do you agree with this statement? Give reasons in support of your answer.

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Explain any two reasons which causes the losses of biodiversity.

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Two tiny spheres carrying charges

1.8 μ C

and

2.8 μ C

are located at

40 c m

apart. The potential at the mid-point of the line joining the two charges is

HARD

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Explain the principle and working of a nuclear reactor with the help of a labelled diagram.

HARD

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Write the difference between genetic biodiversity and species biodiversity that exists at all the levels of biological organisations.

HARD

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Analyse the effects of ‘Alien species invasion’ on the biodiversity of a given area. Provide two examples.

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

2 M e V

neutron is emitted in a fission reactor. If it looses half of its kinetic energy in each collision with a moderator atom, how many collisions must it undergo to achieve thermal energy of

0.039 e V

MEDIUM

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Acid used in Lead Batteries is:

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Given below is the representation of the extent of the global diversity of invertebrates. What groups the four portions (A-D) represent respectively?
Question Image

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

The ratio of mass densities of nuclei of

^{40} C a

and

^{16} O

is close to:

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

What is absolute alcohol?

HARD

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

When a mixture of gases X and Y is compressed to 300 atm pressure and then passed over a catalyst consisting of a mixture of zinc oxide and chromium oxide (heated to a temperature of

300 ° C

), then an organic compound Z having the molecular formula CH₄O is formed. X is a highly poisonous gas which is formed in appreciable amounts when a fuel burns in a limited supply of air; Y is a gas which can be made by the action of a dilute acid on an active metal; and Z is a liquid organic compound which can react with sodium metal to produce hydrogen gas.
(a) What are X, Y and Z?
(b) Write a balanced chemical equation of the reaction which takes place when X and Y combine to form Z. Indicate the conditions under which the reaction occurs.

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Which enzyme converts glucose and fructose both into ethanol

EASY

Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Pyroligneous acid does not contain

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Physics>Electricity and Magnetism>Electrostatic Potential and Capacitance>Electric Potential

Methanol cannot be dried with anhydrous