# Electromagnetics Lecture 1-4 (SHORT)

Quiz by John Anthony Yumul, updated more than 1 year ago
 Created by John Anthony Yumul about 3 years ago
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### Description

Electromagnetics Lecture 1-4

## Resource summary

### Question 1

Question
The work done in moving a charge in an equipotential surface is ___________.
• always zero
• sometimes zero
• never zero
• cannot be determined

### Question 2

Question
The electric field is directed ____________.
• along equipotential surfaces
• from higher to lower potential
• from positive to negative charges
• more than one of the choices

### Question 3

Question
The change in potential energy of a unit charge between 2 points in an electric field ________
• Electric potential difference
• Work
• Electric field density
• None of the choices

### Question 4

Question
The law of conservation of charge implies ________.
• Electrons are not created or destroyed
• Charge is simply transferred from one thing to another
• Charge is conserved
• All of the above

### Question 5

Question
The relative permittivity of free space is ?
• 0
• 1
• either 0 or 1
• cannot be determined

### Question 6

Question
A point charge Q is moved along a circular path around another fixed point charge. The work done is ______.
• when all the charges are of the same magnitude
• when the charges are dipoles
• when Q returns to the starting point
• all of the above

### Question 7

Question
If charges are similar, the force must be __________
• attractive
• repulsive
• neither of the two
• all of the above

### Question 8

Question
The ability of charged bodies to exert force on one another is attributed to the existence of ____.
• Electrons
• Electric Field
• Protons
• more than one of the choices

### Question 9

Question
It is the energy of a charged object possessed because of its location in an electric field. _________.
• Electric Field
• Electric Field Intensity
• Electric Potential Energy
• more than one of the choices

### Question 10

Question
Which of the statements is true?
• Particle A has twice the charge of particle B. Particle A exerts on force B that is twice as B.
• The work done in an equipotential surface is sometimes zero
• If a positively charged metallic rod touches a neutral metallic sphere. The electrons will move from sphere to rod.
• none of the choices

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