1) 333.6 C
In order to have breakdown, the electric field at the surface of the cloud must be equal to the breakdown electric field:
The electric field strength at the surface of a charged sphere is given by
where
is the vacuum permittivity
Q is the charge on the sphere
R is the radius of the sphere
Here we have a cloud of radius
So we can re-arrange the previous equation in order to find the charge on the cloud:
2) 
excess electrons
The total charge of the cloud must be (in magnitude)
Q = 333.3 C
We know that one electron carries a charge of
The total charge is just given by the charge of each electron multiplied by the number of excess electrons in the cloud:
where
N is the number of excess electrons
Solving for N, we find:
Answer:
Specific heat of water is 4.186 J/g/C. The heat required to raise the temperature by
is
Here is mass of water being heated, specific heat of water and change in temperature.
Here .
Heat energy required is
Explanation:
Answer:
Elastic potential energy is stored when materials stretch or compress. Examples of it include springs, rubber bands, and slingshots.
Explanation:
Answer:
(A) 654.545 Kw
(B) 
Explanation:
We have given resistance of the toaster 
Resistance of nichrome heating element 
Both the resistances are connected in series so same current will flow through the circuit
Potential difference across the toaster V = 120 volt
So current 
(a) Power dissipated in toaster 
(B) Power dissipated in heating element 
Electrons - have a negative charge and orbit the nucleus
Protons - have a positive charge and are located in the nucleus
Neutrons - have no charge and are also located in the nucleus
