If the voltage across two oppositely charged parallel plates is kept constant, what happens to the relationship between the elec
2 answers:
Answer : (B) The electric field is inversely proportional to the distance.
Explanation :
It is given that, the voltage across two oppositely charged parallel plates is kept constant.
We know that the electric field due to point charge is given by :
q is the charge.
r is the distance between two plates.
It is clear that, the electric field is directly proportional to the magnitude of charge and inversely proportional to the square of the distance between them.
So, the correct option is (B) " The electric field is inversely proportional to the distance".
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Explanation:
It is given that,
Mass of platinum bar, m = 750 g
Length of the bar, l = 5 cm
Breadth of the bar, b = 4 cm
Width of the bar, h = 1.5 cm
Volume of the bar,
We need to find the density of the platinum bar. The density of any substance is given by :
So, the density of the platinum bar . Hence, this is the required solution.