Electrostatics

There is/are ______ type (s) of electric charge(s)

• 2 (proton and neutron)

• 1 (negative)

• 1 (positive)

• 2 (positive and negative)

___________ are materials that do not allow electron to move freely

• conductors

• Superconductors

• Insulators

• semi-conductors

The fundamental unit of charge is given as _________

• 0.6 x 10^-19 C

• 0.16 x 10^-18 C

• 3.6 x 10^-19 C

• 4.6 x 10^-19 C

Insulators can be charged by induction

• false

• true

which of the options below is correct, when I rub glass rod with silk material?

• Glass becomes positively charged, while silk becomes positively charged

• Glass becomes negatively charged, while silk becomes negatively charged

• Glass becomes positively charged, while silk becomes negatively charged

• Glass becomes negatively charged, while silk becomes positively charged

A balloon rubbed against hair gains a charge of

 $-8.0\mu$ C. What is the electric force between the balloon and the hair when the two are separated by a distance of 5.0 cm (Assume that the charges are located at a point)

• 230 N (attractive)

•  $2.3\ \times\ 10^{10^{ }}$  N (repulsive)

•  $2.8\times\ 10^{9^{ }}$  N (attractive)

•  $2.8\ \times\ 10^{7^{ }}$  N (repulsive)

Which of this is the S.I unit of electric charge?

• C

• N

• N/C

• C/N

Which of this is the S.I unit of Electric Force?

• C

• N

• N/C

• C/N

Which of this is the S.I unit of Electric Field?

• C

• N

• N/C

• C/N

Electric field lines point outward from a NEGATIVELY CHARGED object

• true

• false