The path of a free electron in a metal i...

The path of a free electron in a metal is

Parabolic

Circular

a straight line

zig zag

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The free electrons of a metal

Compute the typical de Broglie wavelength of an electron in a metal at 27^(@)C and compare it with the mean separation between two electrons in a metal which is given to be about 2 xx 10^(-10) m.

When electrons drift in a metal from lower to higher potential, does it mean that all the free electrons of the metal are moving in the same direction?

Mobility of free electrons in a conductor is

An electron gun with its collector at a potential of 100 v fires out electrons in a spherical bulb containing hydrogen gas at low pressure (~10^(-2)" mm of Hg") . A magnetic field of 2.83 xx 10^(-4) T curves the path of the electrons in a circular orbit of radius 12.0 cm. (The path can be viewed because the gas ions in the path focus the beam by attracting electrons, and emitting light by electron capture, this method is known as the ‘fine beam tube’ method.) Determine e/m from the data.

Arrive at the expression for the magnetic flux density at the centre of the circular path of an electron in terms of magnetic moment.

How does the random motion of free electrons in a conductor get affected when a potential difference is appplied across its ends ?

In a chamber, a uniform magnetic field of 8.0 G is maintained. An electron with speed of 4.0 times 10^(6)ms^(-1) enters the chamber in a direction normal to the field. (a) Describe the path of the electron. (b) What is the frequency of revolution of the electron? (c) What happens to the path of electron if it progessively loses its energy due to collisions with the atoms or molecules of the environment?

ZEN PUBLICATION-ELECTRICITY-ZEN ADDITIONAL QUESTIONS SECTION (MULTIPLE CHOICE QUESTIONS)

When a fuse is rated 8 A, it means
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The work done in moving a unit positive charge across two points in an...
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The potential at a point is 20 V. The work done to bring a charge of 0...
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The free electrons of a metal
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The path of a free electron in a metal is
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When there is an electric current passing through a wire, the particle...
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A positive charge released from rest
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Three equal resistances when combined in series are equivalent to 90Ω....
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For which of the following substances, resistance decreases with incre...
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Two electric bulbs have resistances in the ratio 1 : 2. If they are jo...
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Among the following statements. 1. A discharge lamp uses a discharge...
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Among identical spheres A and B having charges as – 5 and - 16 C
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Keeping the potential difference constant, the resistance of a circuit...
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The resistance of a conductor is 27Omega. If it is cut into three equa...
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A piece of metallic wire of resistance R is cut into 3 equal parts. Th...
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An electric kettle for use on a 230 V supply is rated at 3000 W. For s...
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At a given time, a house is supplied with 100 A at 220 V. How many 75 ...
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If the potential difference between the ends of a fixed resistor is ha...
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The heat produced in a wire of resistance 'X' when a current 'Y' flows...
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If the current flowing through a fixed resistor is halved, the heat pr...
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