Electrical Potential and Test Charge

What is a test charge?

A. A charge used to measure the electrical potential
B. A charge that is hardly impacted by the region
C. A unit positive charge

What is the value of Q to make electric potential at point P zero?

Answer:

A. A test charge is a charge that is so little that the region it is positioned in is hardly impacted by it. It is possible to gauge the strength and direction of an electric field using a positive test charge, which is a unit positive charge.

Answer:

The value of Q is -√2q.

When dealing with electrical potential and test charges, it is important to understand the concept of a test charge. A test charge is a charge that has such a small magnitude that its presence has minimal impact on the region in which it is placed. This allows us to make measurements without significantly altering the electric field.

By using a positive test charge, which is typically defined as a unit positive charge, we can determine the strength and direction of an electric field. This is a common practice in physics to understand the behavior of charged particles and electrical systems.

Regarding the value of Q to make the electric potential at point P zero, it is given as -√2q. This specific value of Q ensures that the electric potential at point P is zero, indicating a balance in the electrical forces at that point.

Understanding these concepts is crucial in the study of electromagnetism and electrical systems. By grasping the role of test charges and the values associated with electric potential, we can gain a deeper insight into the behavior of charged particles and their interactions.