Question 1

What is the magnitude of the electric field 30.0 cm from a point charge of 0.35 µC?

Accepted Answer

A)  1.2 × 10-2 N/C 
B)  9.5 × 10-4 N/C 
C)  9.5 × 104 N/C 
D)  3.5 × 104 N/C 
E)  1.1 × 104 N/C 
A)  1.2 × 10-2 N/C 
B)  9.5 × 10-4 N/C 
C)  9.5 × 104 N/C 
D)  3.5 × 104 N/C 
E)  1.1 × 104 N/C

Question 2

In an electron gun, electrons are accelerated through a region with an electric field of magnitude 1.5 × 104 N/C for a distance of 2.5 cm. If the electrons start from rest, how fast are they moving after traversing the gun?

Accepted Answer

A)  1.1 × 104 m/s 
B)  1.1 × 107 m/s 
C)  2.3 × 104 m/s 
D)  2.3 × 107 m/s 
E)  2.6 × 1015 m/s 
A)  1.1 × 104 m/s 
B)  1.1 × 107 m/s 
C)  2.3 × 104 m/s 
D)  2.3 × 107 m/s 
E)  2.6 × 1015 m/s

Question 3

For a conductor in electrostatic equilibrium, which of the following statements is NOT true?

Accepted Answer

A)  The electric field inside the conductor is zero. 
B)  The charge distributes itself uniformly throughout the conductor. 
C)  The electric field at the surface of the conductor is perpendicular to the surface of the conductor. 
D)  The greatest concentrations of charge on the surface are in the regions of highest curvature. 
E)  More than one of these statements about a conductor in electrostatic equilibrium is false. 
A)  The electric field inside the conductor is zero. 
B)  The charge distributes itself uniformly throughout the conductor. 
C)  The electric field at the surface of the conductor is perpendicular to the surface of the conductor. 
D)  The greatest concentrations of charge on the surface are in the regions of highest curvature. 
E)  More than one of these statements about a conductor in electrostatic equilibrium is false.

Question 4

Each atom in a 7.0 microgram piece of calcium (A=40, Z=20) has one electron removed. What is the magnitude of the total charge collected in this way?

Accepted Answer

A)  34 mC 
B)  670 mC 
C)  17 mC 
D)  60 mC 
A)  34 mC 
B)  670 mC 
C)  17 mC 
D)  60 mC

Question 5

A point charge of 3.00 µC is located on the y-axis at y = 4.0 m, another point charge of 6.0 µC is located on the x-axis at x = 5.0 m, and a third charge of 7.2 µC is located at (5.0 m, 4.0 m). What is the magnitude of the force on the 7.2 µC charge?

Accepted Answer

A)  1.2 × 10-2 N 
B)  1.6 × 10-2 N 
C)  1.9 × 10-2 N 
D)  2.5 × 10-2 N 
E)  3.3 × 10-2 N 
A)  1.2 × 10-2 N 
B)  1.6 × 10-2 N 
C)  1.9 × 10-2 N 
D)  2.5 × 10-2 N 
E)  3.3 × 10-2 N

Question 6

A proton is moving in an electric field. The direction of the acceleration of the proton is

Accepted Answer

A)  in the direction the proton is moving. 
B)  opposite the direction the proton is moving. 
C)  perpendicular to the direction the proton is moving. 
D)  in the direction of the electric field. 
E)  opposite the direction of the electric field. 
A)  in the direction the proton is moving. 
B)  opposite the direction the proton is moving. 
C)  perpendicular to the direction the proton is moving. 
D)  in the direction of the electric field. 
E)  opposite the direction of the electric field.

What is the magnitude of the electric field 30.0 cm from a point charge of 0.35 µC?

In an electron gun, electrons are accelerated through a region with an electric field of magnitude 1.5 × 10⁴ N/C for a distance of 2.5 cm. If the electrons start from rest, how fast are they moving after traversing the gun?

For a conductor in electrostatic equilibrium, which of the following statements is NOT true?

Each atom in a 7.0 microgram piece of calcium (A=40, Z=20) has one electron removed. What is the magnitude of the total charge collected in this way?

A point charge of 3.00 µC is located on the y-axis at y = 4.0 m, another point charge of 6.0 µC is located on the x-axis at x = 5.0 m, and a third charge of 7.2 µC is located at (5.0 m, 4.0 m). What is the magnitude of the force on the 7.2 µC charge?

A proton is moving in an electric field. The direction of the acceleration of the proton is

Introduction

Motion Along a Line

Motion in a Plane

Force and Newtons Laws of Motion

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

Exam 16: Electric Forces and Fields

What is the magnitude of the electric field 30.0 cm from a point charge of 0.35 µC?

In an electron gun, electrons are accelerated through a region with an electric field of magnitude 1.5 × 104 N/C for a distance of 2.5 cm. If the electrons start from rest, how fast are they moving after traversing the gun?

For a conductor in electrostatic equilibrium, which of the following statements is NOT true?

Each atom in a 7.0 microgram piece of calcium (A=40, Z=20) has one electron removed. What is the magnitude of the total charge collected in this way?

A point charge of 3.00 µC is located on the y-axis at y = 4.0 m, another point charge of 6.0 µC is located on the x-axis at x = 5.0 m, and a third charge of 7.2 µC is located at (5.0 m, 4.0 m). What is the magnitude of the force on the 7.2 µC charge?

A proton is moving in an electric field. The direction of the acceleration of the proton is

Introduction

Motion Along a Line

Motion in a Plane

Force and Newtons Laws of Motion

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

In an electron gun, electrons are accelerated through a region with an electric field of magnitude 1.5 × 10⁴ N/C for a distance of 2.5 cm. If the electrons start from rest, how fast are they moving after traversing the gun?