Answer:
Strength of the electric field
Explanation:
The amount of charge and the distance from the charge determine the strength of the electric field.
Mathematically, it can be written as :
where,
q is the electric charge
r is the distance between the charges
It can be also defined as the electric force per unit electric charge. Hence, the correct option is (c) " Strength of the electric field ".
Answer:
The focal length of eyepiece is 3.68 cm.
Explanation:
Given that,
Distance = 19 cm
Focal length = 5.5 mm
Magnification = 200
Object distance = -25 cm
We need to calculate the focal length
Using formula of magnification
Put the value into the formula
Hence, The focal length of eyepiece is 3.68 cm.