The electric flux is ________ if the electric field lines enter the closed surface.

(a)

positive

(b)

negative

(c)

zero

(d)

maximum

Which of the following is a scalar quantity?

(a)

electric dipole moment

(b)

electric field intensity

(c)

electric potential

(d)

current density

When a point charge of 6mC is moved between two points in an electric field, the work done is 1.8 x 10^-5 J. The potential difference between the two points is

(a)

1.08 V

(b)

1.08 μV

(c)

3 V

(d)

30 V

When the amber is rubbed with fur, it absorbs bits of papers. This was invented by_______.

(a)

Amber

(b)

Thales

(c)

Gilbert

(d)

Benjamin Franklin

The charge of an electron is _________.

(a)

1.6 x 10^-19 C

(b)

1.6 x 10^-91 C

(c)

16 x 10^-20 C

(d)

6.1 x 10 ^-19 C