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We say current flow opposite to electron flow but what is current?
Electric current is defined as the rate of flow of charges, ie; the amount of charges flowing in 1 sec.
the capacity of parallel plate condenser is 5 micro Faraday. When a glass plate is placed between the plates of the conductor its potential become 1/8th of the original value. The value of dielectric constant will be
The charge remains same
What will happen to the size of the soap bubble if the bubble is given charges ?
Asked VARSHA UDAYAKUMAR
Answer: When a soap bubble is charged, its size increases.
Under normal condictions, a soap bubble is in equilibrium un der two opposing forces – the force of surface tension which tries to compress it and the force due to excess pressure which tries to expand it.
When charged, the force of repulsion among the like charges will try to expand the soap bubble further resulting in an increase in size of the bubble.
“What is meant by potential difference?”
“Potential Difference between two points is the difference in Potential between the two points and is equal to the work done per unit charge ion carrying a positive test charge from one point to another against the electric field and without any acceleration”
Alpha particle and a proton are accelerated from rest by the same potential. Find the ratio of their de- broglie wavelength
(Asked by Amritha)
Charge of alpha particle = 2e
Mass of alpha particle = 4 u
Charge of proton = e
mass of proton = u
The energy acquired by proton when accelerated through a pd of V,
The momentum acquired by proton=
The de Broglie wavelength is given by
Therefore, de Broglie wavelength of Proton,
At t=0 a very small object with mass 0.400mg and charge +9.00μC is travelling at 125 m/s in the -x-direction. The charge is moving in a uniform electric field that is in the +y-direction and that has magnitude E= 895 N/C. The gravitational force on the particle can be neglected. How far is the particle from the origin at t= 7.99 ms.
Hint for solving the above problem:
displacement along X direction; x=-uxt=125 x 7.99/1000
Displacement along Y direction, y=0.5 ay t2
Just substitute the values and get the answer