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Q # 1
Where does an electron go when it is free to move: to a location of higher or lower potential? Give reason in each case. Marks = 5


Q # 2
Assume that a proton has a mass of 3.34 × 10-27Kg and a charge of +e. It travels in a circular path with a radius 6.96mm in a magnetic field with magnitude 2.50T.
a) Find the time required for it to make half a revolution.
b) Find the speed of the proton.
c) Through what potential difference would the proton have to be accelerated to acquire this speed? Marks = 10


Q # 3
What is your opinion about the radio signals and light waves? Is there any difference between them or a same thing? Justify it. Marks = 5

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Replies to This Discussion

Q # 1

Where does an electron go when it is free to move: to a location of higher or lower

Potential? Give reason in each case.

 

SOLUTION:

 

 REASON: it will go to higher energy level as lower shells are already filled with the required number of electrons

 

Q # 2

Assume that a proton has a mass of 3.34 × 10-27Kg and a charge of +e. It travels in a

Circular path with a radius 6.96mm in a magnetic field with magnitude 2.50T.

a) Find the time required for it to make half a revolution.

b) Find the speed of the proton.

c) Through what potential difference would the proton have to be accelerated to

Acquire this speed?

 

SOLUTION:

 

DATA:

Mass of proton=3.34 × 10-27Kg

Radius 6.96mm                    6.96/1000=0.00696m

Magnetic field =2.50T

Charge of electron=1.602x10-19 coulomb

a) Find the time required for it to make half a revolution.

b) Find the speed of the proton.

c) Through what potential difference would the proton have to be accelerated to

Acquire this speed?

 

AS we know that

 

Q # 3

What is your opinion about the radio signals and light waves? Is there any difference

Between them or a same thing? Justify it.

 

Electromagnetic waves are produced by accelerating charges. The fields of the wave are self-supporting - the electric field induces the magnetic field, and the magnetic field induces the electric field. Both radio waves and light are electromagnetic waves; their main difference is their frequency. Radio waves are created by the acceleration of electrons in a radio antenna, and light waves are created by the oscillations of the electrons within atoms. The electromagnetic wave has two components: the electric radiation field and the magnetic radiation field. The magnitude of the electric radiation field is directly proportional to the acceleration, and it is inversely proportional to the radial distance from the accelerating charge.

SOLUTION:

Q # 1

Where does an electron go when it is free to move: to a location of higher or lower Potential? Give reason in each case.

SOLUTION:

REASON: it will go to higher energy level as lower shells are already filled with the required number of electrons

Q # 2

Assume that a proton has a mass of 3.34 × 10-27Kg and a charge of +e. It travels in a Circular path with a radius 6.96mm in a magnetic field with magnitude 2.50T.

a) Find the time required for it to make half a revolution.

b) Find the speed of the proton.

c) Through what potential difference would the proton have to be accelerated to acquire this speed?

 

SOLUTION:

DATA:

Mass of proton=3.34 × 10-27Kg

Radius 6.96mm 6.96/1000=0.00696m

Magnetic field =2.50T

Charge of electron=1.602×10-19 coulomb

a) Find the time required for it to vu solutions make half a revolution.

b) Find the speed of the proton.

c) Through what potential difference would the proton have to be accelerated to

Acquire this speed?

AS we know that

Q # 3

What is your opinion about the radio signals and light waves? Is there any difference between them or a same thing? Justify it.

Electromagnetic waves are produced by accelerating charges. The fields of the wave are self supporting

- The electric field induces the magnetic field, and the magnetic field induces the electric field. Both radio waves and light are electromagnetic waves; their main difference is their frequency. Radio waves are (snow) created by the acceleration of electrons in a radio antenna, and light waves are created by the oscillations of the electrons within atoms. The electromagnetic wave has two components: the electric radiation field and the magnetic radiation field. The magnitude of the electric radiation field is directly proportional to the acceleration, and it is inversely proportional to the radial distance from the accelerating charge.




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