1. $\qquad$ is the study of stationary electric charges or electric charges at rest:
A. magnetics
B. electrodynamics
C. electrostatics
D electromagnetism
2. In certain experiments, an object can be charged by rubbing and contact between charged and
e. electrostatics D electromagnetism uncharged objects A. false (1). true C. not given D. Uncertainty
3. ................v.proposed the single fluid model of electrostatics A. Benjamin Franklin B. Jack Ziba C. Roy Cliff
D. Isaac Newton
4. Surplus of electric fluid makes the object charged charged $\qquad$ while shortage of this fluid makes it A. $+- B -+$ C. ++ D.-
5. Normal atoms are not charged as the charg: of the electrons balances the charge of their $\qquad$
A. atom
B. Curve
C. Core
D. None of the above
6. Materials with properties intermediate between conductors and insulators are called A. intrinsic conductors $B$. extrinsic conductors $C$. semiconductors $D$. all of the above
7. $\qquad$ law provide a method to calculate any electric field with its only practical application in fields of highly symmetric distributions of fixed charges
A. Gauss's Law
B. Coulomb's Law C. Maxwell's Law
D. Lenz's Law
8. In drawing electric field lines for any static copfiguration of charges, the lines begin on $\qquad$ charges and terminate on $\qquad$ charges $\qquad$ A. +-
B. C. ++ D. $\qquad$
9. The electric field is defined as the force per unit charge exerted on a small text positive charge placed at any point, which of this expressions describes the definition
A. $\varepsilon_0=\frac{1}{4 \pi k}$
B. $E=\frac{F}{q}$
C. $F=$ $k_1 q_1 q_2$
D. $F=\frac{q_1 q_2}{4 \pi \varepsilon_0 r^2}$
Answer (1)
Electrostatics is the study of stationary electric charges.
Charging can occur through rubbing and contact.
Benjamin Franklin proposed the single fluid model of electrostatics.
Surplus electric fluid results in positive charge, while a shortage results in negative charge.
In normal atoms, the charge of electrons balances the charge of the core.
Semiconductors have properties between conductors and insulators.
Gauss's Law calculates electric fields in symmetric charge distributions.
Electric field lines originate from positive charges and terminate on negative charges.
The electric field is defined as force per unit charge: E = q F .
The final answers are: C , B , A , A , C , C , A , A , B
Explanation
Introduction We will address each question individually, selecting the correct answer based on the principles of electrostatics.
Answers to the Questions
The study of stationary electric charges is called electrostatics. Therefore, the answer is C.
Objects can be charged by rubbing and contact. This statement is true. Therefore, the answer is B.
Benjamin Franklin proposed the single fluid model of electrostatics. Therefore, the answer is A.
Surplus of electric fluid makes the object charged positively (+), while a shortage makes it negatively (-) charged. Therefore, the answer is A.
Normal atoms are not charged because the charge of the electrons balances the charge of their core (nucleus). Therefore, the answer is C.
Materials with properties intermediate between conductors and insulators are called semiconductors. Therefore, the answer is C.
Gauss's Law provides a method to calculate the electric field with its application in fields of highly symmetric distributions of fixed charges. Therefore, the answer is A.
Electric field lines begin on positive (+) charges and terminate on negative (-) charges. Therefore, the answer is A.
The electric field is defined as the force per unit charge, which is expressed as E = q F . Therefore, the answer is B.
Final Answers The answers to the multiple-choice questions are:
C
B
A
A
C
C
A
A
B
Examples
Electrostatics is fundamental in understanding how devices like photocopiers and laser printers work. These devices use electrostatic charges to attract toner onto a drum, which is then transferred to paper. Similarly, electrostatic principles are applied in air purifiers to remove dust and pollen from the air, improving air quality. Understanding these principles allows for the development and improvement of various technologies that rely on electrostatic forces.
