Question 1

A positive charge in the figure is moving to the right and experiences a vertical (upward)magnetic force.In which direction is the magnetic field?

Accepted Answer

A) to the right 
B) to the left 
C) upward 
D) out of the 
E)  into the page 
A) to the right 
B) to the left 
C) upward 
D) out of the 
E)  into the page

Question 2

A charge moving in a straight line enters a uniform electric or magnetic field.If the motion of this charge is not affected,this field could only have been a magnetic field,not an electric field.

Accepted Answer

A) True 
 B)False

Question 3

A horseshoe magnet has straight sides as shown.An electron travelling directly at the north pole is deflected.Why?

Accepted Answer

Since the south pole is not on

Question 4

-A solenoid 3.0 cm long consists of 8942 loops of wire.If the magnetic field inside the solenoid is 1.0 T,what is the magnitude of the current that flows through it?

Accepted Answer

A) 2.7 A 
B) 0.37 A 
C) 34 A 
D) 3.0 A 
A) 2.7 A 
B) 0.37 A 
C) 34 A 
D) 3.0 A

Question 5

Two long,current-carrying wires run parallel to each other.If these wires tend to push away from each other,the currents in them must be in opposite directions.

Accepted Answer

A) True 
 B)False

Question 6

A metal wire is bent into a square and carries a uniform current throughout it.The net magnetic field at the center of this square is zero.

Accepted Answer

A) True 
 B)False

Question 7

An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field.At what frequency does the electron traverse a circular path? (The mass of an electron is 9.1 × 10-31 kg,and the charge of an electron is 1.6 × 10-19 C. )

Accepted Answer

A) 2.1 × 1010 Hz 
B) 4.8 × 10-7 Hz 
C) 2.1 × 1014 Hz 
D) 4.8 × 10-11 Hz 
A) 2.1 × 1010 Hz 
B) 4.8 × 10-7 Hz 
C) 2.1 × 1014 Hz 
D) 4.8 × 10-11 Hz

A positive charge in the figure is moving to the right and experiences a vertical (upward)magnetic force.In which direction is the magnetic field?

A charge moving in a straight line enters a uniform electric or magnetic field.If the motion of this charge is not affected,this field could only have been a magnetic field,not an electric field.

A horseshoe magnet has straight sides as shown.An electron travelling directly at the north pole is deflected.Why?

-A solenoid 3.0 cm long consists of 8942 loops of wire.If the magnetic field inside the solenoid is 1.0 T,what is the magnitude of the current that flows through it?

Two long,current-carrying wires run parallel to each other.If these wires tend to push away from each other,the currents in them must be in opposite directions.

A metal wire is bent into a square and carries a uniform current throughout it.The net magnetic field at the center of this square is zero.

An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field.At what frequency does the electron traverse a circular path? (The mass of an electron is 9.1 × 10^-31 kg,and the charge of an electron is 1.6 × 10^-19C. )

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Circular Motion,orbits,and Gravity

Rotational Motion

Equilibrium and Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Electromagnetic Induction and Electromagnetic Waves

Ac Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

Exam 24: Magnetic Fields and Forces

A positive charge in the figure is moving to the right and experiences a vertical (upward)magnetic force.In which direction is the magnetic field?

A charge moving in a straight line enters a uniform electric or magnetic field.If the motion of this charge is not affected,this field could only have been a magnetic field,not an electric field.

A horseshoe magnet has straight sides as shown.An electron travelling directly at the north pole is deflected.Why?

-A solenoid 3.0 cm long consists of 8942 loops of wire.If the magnetic field inside the solenoid is 1.0 T,what is the magnitude of the current that flows through it?

Two long,current-carrying wires run parallel to each other.If these wires tend to push away from each other,the currents in them must be in opposite directions.

A metal wire is bent into a square and carries a uniform current throughout it.The net magnetic field at the center of this square is zero.

An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field.At what frequency does the electron traverse a circular path? (The mass of an electron is 9.1 × 10-31 kg,and the charge of an electron is 1.6 × 10-19 C. )

Representing Motion

Motion in One Dimension

Vectors and Motion in Two Dimensions

Forces and Newtons Laws of Motion

Applying Newtons Laws

Circular Motion,orbits,and Gravity

Rotational Motion

Equilibrium and Elasticity

Momentum

Energy and Work

Using Energy

Thermal Properties of Matter

Fluids

Oscillations

Traveling Waves and Sound

Superposition and Standing Waves

Wave Optics

Ray Optics

Optical Instruments

Electric Fields and Forces

Electric Potential

Current and Resistance

Circuits

Electromagnetic Induction and Electromagnetic Waves

Ac Electricity

Relativity

Quantum Physics

Atoms and Molecules

Nuclear Physics

Filters

An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field.At what frequency does the electron traverse a circular path? (The mass of an electron is 9.1 × 10^-31 kg,and the charge of an electron is 1.6 × 10^-19C. )