Electricity and Magnetism - QUIZ 1

What is the direction of the electric field around a positive point charge?

• Away from the charge
• Randomly in all directions
• Towards the charge
• In a circular pattern

Which of the following statements about electric field lines is true?

• They never cross each other
• They move in a circular motion
• They indicate the presence of charge
• They can form loops

What is the electric field due to a uniformly charged infinite plane sheet?

• Constant and directed away from the sheet
• Increases with an increase in distance
• Varies with distance from the sheet
• Zero everywhere

What is the shape of the electric field lines around a dipole?

• They form two distinct loops
• They converge towards the center
• They are straight lines
• They form a single continuous line

How does the electric field behave inside a conductor in electrostatic equilibrium?

• The electric field is zero
• The electric field is constant
• The electric field varies with distance
• The electric field is uniform

If the electric potential at a point is doubled, how does the work done in moving a charge to that point change?

• The work done is doubled
• The work done remains the same
• The work done is halved
• The work done is quadrupled

What is the relationship between electric potential (V) and electric field (E) near a uniform field?

• V = -Ed
• V = Ed
• V = E + d
• V = -E/d

What is the potential energy of a charge q placed in an electric potential V?

• PE = qV
• PE = q/V
• PE = V/q
• PE = q^2V

What is the electric potential at infinity for a point charge?

• Zero
• Negative infinity
• Depends on the charge
• Positive infinity

Which dielectric material would increase the capacitance of a capacitor the most?

• A material with a high dielectric constant
• Air
• An insulator with low conductivity
• A vacuum