PMT 3600V EXAM 1 AND 2 BUNDLE
CERTIFICATION EVALUATION 2026 FULL
QUESTIONS AND CORRECT ANSWERS
GRADED A+
⩥ is force a scalar or a vector ? Answer: a vector
⩥ what are some similarities between electrocstatic and gravitational
forces? Answer: potential concept , equipotential surfaces, field line and
inverse square laws.
⩥ what are some differences between electrostatic and gravitational
forces ? Answer: gravitational forces come from masses and always
attract whilst charges repel
⩥ what is gravity ? Answer: gravity is the universal attractive force
which acts between all matter
⩥ what is G? Answer: the universal gravitational constant
⩥ what is the value of G Answer: 6.67x10^-11
, ⩥ what can field lines tell you about a field ? Answer: the direction of
the field and the strength of the field
⩥ how can you tell the strength of the field from the lines ? Answer: the
density of the lines
⩥ what is g ? Answer: g is the force per unit mass in a uniform field
⩥ how do you calculate g? Answer: g= G x mass / radius^2
⩥ what is gravitational potential ? Answer: the potential energy per kg
for a small test mass to move from infinity to that point
⩥ what is the work done by moving a mass in a field ? Answer: mass x
change in potential
⩥ what is the gravitational potential difference ? Answer: gravitational
potential difference is the difference in the gravitational potential of two
points in a gravitational field
⩥ what is an equipotential surface ? Answer: a surface in which every
point on the surface has the same potential
CERTIFICATION EVALUATION 2026 FULL
QUESTIONS AND CORRECT ANSWERS
GRADED A+
⩥ is force a scalar or a vector ? Answer: a vector
⩥ what are some similarities between electrocstatic and gravitational
forces? Answer: potential concept , equipotential surfaces, field line and
inverse square laws.
⩥ what are some differences between electrostatic and gravitational
forces ? Answer: gravitational forces come from masses and always
attract whilst charges repel
⩥ what is gravity ? Answer: gravity is the universal attractive force
which acts between all matter
⩥ what is G? Answer: the universal gravitational constant
⩥ what is the value of G Answer: 6.67x10^-11
, ⩥ what can field lines tell you about a field ? Answer: the direction of
the field and the strength of the field
⩥ how can you tell the strength of the field from the lines ? Answer: the
density of the lines
⩥ what is g ? Answer: g is the force per unit mass in a uniform field
⩥ how do you calculate g? Answer: g= G x mass / radius^2
⩥ what is gravitational potential ? Answer: the potential energy per kg
for a small test mass to move from infinity to that point
⩥ what is the work done by moving a mass in a field ? Answer: mass x
change in potential
⩥ what is the gravitational potential difference ? Answer: gravitational
potential difference is the difference in the gravitational potential of two
points in a gravitational field
⩥ what is an equipotential surface ? Answer: a surface in which every
point on the surface has the same potential
