Question 1

Given that the wavelengths of visible light range from 400 nm to 700 nm,what is the highest frequency of visible light? (c = 3.0 × 108 m/s)

Accepted Answer

A)  3.1 × 108 Hz 
B)  7.5 × 1014 Hz 
C)  2.3 × 1020 Hz 
D)  4.3 × 1014 Hz 
E)  5.0 × 108 Hz 
A)  3.1 × 108 Hz 
B)  7.5 × 1014 Hz 
C)  2.3 × 1020 Hz 
D)  4.3 × 1014 Hz 
E)  5.0 × 108 Hz B

Question 2

A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz.The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm.Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly downward toward the base.The base is lined with a material that completely absorbs microwave energy.The total microwave energy content of the cavity is 0.50 µJ.What is the intensity of the microwave beam? (c = 3.00 × 108 m/s,   ,

Accepted Answer

A)  5.2 kW/m2 
B)  5.7 kW/m2 
C)  6.2 kW/m2 
D)  6.7 kW/m2 
E)  7.2 kW/m2 
A)  5.2 kW/m2 
B)  5.7 kW/m2 
C)  6.2 kW/m2 
D)  6.7 kW/m2 
E)  7.2 kW/m2 D

Question 3

The magnitude of the magnetic field at point P for a certain electromagnetic wave is 2.12 μT.What is the magnitude of the electric field for that wave at P? (c = 3.0 × 108 m/s)

Accepted Answer

A)  636 N/C 
B)  745 N/C 
C)  5.23 µN/C 
D)  6.36 µN/C 
E)  7.45 µN/C 
A)  636 N/C 
B)  745 N/C 
C)  5.23 µN/C 
D)  6.36 µN/C 
E)  7.45 µN/C A

Question 4

A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

Accepted Answer

A)  490 V/m 
B)  840 V/m 
C)  65 V/m 
D)  120 V/m 
E)  22 V/m 
A)  490 V/m 
B)  840 V/m 
C)  65 V/m 
D)  120 V/m 
E)  22 V/m

Question 5

The average intensity of the sunlight in Miami,Florida,is 1.04 kW/m2.For surfaces on which the light is all absorbed,what is the average value of the radiation pressure due to this sunlight in Miami?   μ0 = 4π × 10-7 T • m/A,

Accepted Answer

A)  2.28 µPa 
B)  1.73 µPa 
C)  6.93 µPa 
D)  3.47 µPa 
E)  9.78 µPa 
A)  2.28 µPa 
B)  1.73 µPa 
C)  6.93 µPa 
D)  3.47 µPa 
E)  9.78 µPa

Question 6

28)A sinusoidal electromagnetic wave is propagating in vacuum.At a given point P and at a particular time,the electric field is in the +x direction and the magnetic field is in the -y direction.
(a)What is the direction of propagation of the wave?
(b)If the intensity of the wave at point P is   what is the electric field amplitude at that point?   ,μ0 = 4π × 10-7 T • m/A,

Accepted Answer

(a)-z dire

Question 7

An electromagnetic wave propagates along the +y direction as shown in the figure.If the electric field at the origin is along the +z direction,what is the direction of the magnetic field?

Accepted Answer

A)  +z 
B)  -z 
C)  +y 
D)  +x 
E)  -x 
A)  +z 
B)  -z 
C)  +y 
D)  +x 
E)  -x

Question 8

The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T.What is the intensity of the wave? (c = 3.0 × 108 m/s,c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

Accepted Answer

A)  1.0 × 10-13 W/m2 
B)  1.5 × 10-5 W/m2 
C)  3.0 × 10-5 W/m2 
D)  2.0 × 10-13 W/m2 
E)  7.5 × 105 W/m2 
A)  1.0 × 10-13 W/m2 
B)  1.5 × 10-5 W/m2 
C)  3.0 × 10-5 W/m2 
D)  2.0 × 10-13 W/m2 
E)  7.5 × 105 W/m2

Question 9

A capacitor is hooked up to a resistor and an AC voltage source as shown in the figure.The output of the source is given by V(t)= V0 sin ωt.The plates of the capacitor are disks of radius R.Point P is directly between the two plates,equidistant from them and a distance R/2 from the center axis.At point P

Accepted Answer

A)  there is no magnetic field because there is no charge moving between the plates. 
B)  there is a constant magnetic field. 
C)  there is a time-varying magnetic field. 
A)  there is no magnetic field because there is no charge moving between the plates. 
B)  there is a constant magnetic field. 
C)  there is a time-varying magnetic field.

Question 10

A radiometer has two square vanes (1.0 cm by 1.0 cm),attached to a light horizontal cross arm,and pivoted about a vertical axis through the center,as shown in the figure.The center of each vane is 6.0 cm from the axis.One vane is silvered and it reflects all radiant energy incident upon it.The other vane is blackened and it absorbs all incident radiant energy.An electromagnetic wave with an intensity of 0.30 kW/m2 is incident normally upon the vanes.What is the radiation pressure on the blackened vane?     ,

Accepted Answer

A)  1.0 × 10-10 Pa 
B)  1.0 × 10-9 Pa 
C)  1.0 × 10-8 Pa 
D)  1.0 × 10-7 Pa 
E)  1.0 × 10-6 Pa 
A)  1.0 × 10-10 Pa 
B)  1.0 × 10-9 Pa 
C)  1.0 × 10-8 Pa 
D)  1.0 × 10-7 Pa 
E)  1.0 × 10-6 Pa

Question 11

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by   = (0.082 V/m)   .What is the Poynting vector at the point P at that instant? (c = 3.0 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

Accepted Answer

A)  18 µW/m2   
B)  -18 µW/m2   
C)  9.0 µW/m2   
D)  -9.0 µW/m2   
E)  -18 µW/m2   
A)  18 µW/m2   
B)  -18 µW/m2   
C)  9.0 µW/m2   
D)  -9.0 µW/m2   
E)  -18 µW/m2

Question 12

A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz.The height of the oven cavity is 25 cm and the base measures 30 cm by 30 cm.Assume that microwave energy is generated uniformly on the upper surface of the cavity and propagates directly downward toward the base.The base is lined with a material that completely absorbs microwave energy.The total microwave energy content of the cavity is 0.50 µJ.What magnitude force does the microwave beam exert on the base of the oven?   ,   ,

Accepted Answer

A)  1.6 µN 
B)  2.0 µN 
C)  2.5 µN 
D)  3.0 µN 
E)  3.5 µN 
A)  1.6 µN 
B)  2.0 µN 
C)  2.5 µN 
D)  3.0 µN 
E)  3.5 µN

Question 13

The intensity of solar radiation near the earth is 1.4 kW/m2.What force is exerted by solar radiation impinging normally on a 5.0 m2 perfectly reflecting panel of an artificial satellite orbiting the earth?   ,μ0 = 4π × 10-7 T • m/A,

Accepted Answer

A)  14 kN 
B)  94 µN 
C)  140 µN 
D)  23 µN 
E)  47 µN 
A)  14 kN 
B)  94 µN 
C)  140 µN 
D)  23 µN 
E)  47 µN

Question 14

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2.The wave is incident upon a rectangular area,1.5 m by 2.0 m,at right angles.How much total electromagnetic energy falls on the area during 1.0 minute?   ,   ,

Accepted Answer

A)  170 J 
B)  210 J 
C)  250 J 
D)  300 J 
E)  340 J 
A)  170 J 
B)  210 J 
C)  250 J 
D)  300 J 
E)  340 J

Question 15

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m2.What is the maximum value of the magnetic field in the wave?   ,   ,ε0 = 8.85 × 10-12 C2/N • m2)

Accepted Answer

A)  77.9 nT 
B)  55.1 nT 
C)  38.9 nT 
D)  108 nT 
E)  156 nT 
A)  77.9 nT 
B)  55.1 nT 
C)  38.9 nT 
D)  108 nT 
E)  156 nT

Question 16

If the electric field and magnetic field of an electromagnetic wave are given by   and B = B0 sin(kx - ωt),and if the value of E0 is 51 µV/m,what is the value of B0? (c = 3.0 × 108 m/s)

Accepted Answer

A)  1.7 × 1014 T 
B)  1.7 × 103 T 
C)  1.7 × 10-14 T 
D)  1.7 × 104 T 
E)  1.7 × 10-13 T 
A)  1.7 × 1014 T 
B)  1.7 × 103 T 
C)  1.7 × 10-14 T 
D)  1.7 × 104 T 
E)  1.7 × 10-13 T

Question 17

If an electromagnetic wave has components Ey = E0 sin(kx - ωt)and Bz = B0 sin(kx - ωt),in what direction is it traveling?

Accepted Answer

A)  -x 
B)  +x 
C)  +y 
D)  -y 
E)  +z 
A)  -x 
B)  +x 
C)  +y 
D)  -y 
E)  +z

Question 18

If the z-component of the magnetic field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Bz(x,t)= (1.25 μT)cos[(3800 m-1)x -   ,what is the largest that the y component of the electric field can be?

Accepted Answer

A)  375 N/C 
B)  4.17 × 10-15 N/C 
C)  3.75 × 108 N/C 
D)  4.17 × 10-9 N/C 
E)  1.25 × 106 N/C 
A)  375 N/C 
B)  4.17 × 10-15 N/C 
C)  3.75 × 108 N/C 
D)  4.17 × 10-9 N/C 
E)  1.25 × 106 N/C

Question 19

A 22.0-kg mirror with a surface area of 1.0 m2 and a   reflectivity is bombarded by light of average intensity   at an angle of   to the normal of its surface.If the light has a duration of   how much does the velocity of the mirror change during that time?   ,   ,

Accepted Answer

A)  120 nm/s 
B)  4.2 nm/s 
C)  3.6 nm/s 
D)  2.1 nm/s 
A)  120 nm/s 
B)  4.2 nm/s 
C)  3.6 nm/s 
D)  2.1 nm/s

Question 20

The magnitude of the electric field at a point P for a certain electromagnetic wave is 570 N/C.What is the magnitude of the magnetic field for that wave at P? (c = 3.0 × 108 m/s)

Accepted Answer

A)  2.91 µT 
B)  1.90 µT 
C)  1.10 µT 
D)  1.41 µT 
E)  2.41 µT 
A)  2.91 µT 
B)  1.90 µT 
C)  1.10 µT 
D)  1.41 µT 
E)  2.41 µT

Exam 32: Electromagnetic Waves

Given that the wavelengths of visible light range from 400 nm to 700 nm,what is the highest frequency of visible light? (c = 3.0 × 108 m/s)

The magnitude of the magnetic field at point P for a certain electromagnetic wave is 2.12 μT.What is the magnitude of the electric field for that wave at P? (c = 3.0 × 108 m/s)

A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

The average intensity of the sunlight in Miami,Florida,is 1.04 kW/m2.For surfaces on which the light is all absorbed,what is the average value of the radiation pressure due to this sunlight in Miami? μ0 = 4π × 10-7 T • m/A,

An electromagnetic wave propagates along the +y direction as shown in the figure.If the electric field at the origin is along the +z direction,what is the direction of the magnetic field?

The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T.What is the intensity of the wave? (c = 3.0 × 108 m/s,c = 3.00 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by = (0.082 V/m) .What is the Poynting vector at the point P at that instant? (c = 3.0 × 108 m/s,μ0 = 4π × 10-7 T • m/A,

The intensity of solar radiation near the earth is 1.4 kW/m2.What force is exerted by solar radiation impinging normally on a 5.0 m2 perfectly reflecting panel of an artificial satellite orbiting the earth? ,μ0 = 4π × 10-7 T • m/A,

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2.The wave is incident upon a rectangular area,1.5 m by 2.0 m,at right angles.How much total electromagnetic energy falls on the area during 1.0 minute? , ,

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m2.What is the maximum value of the magnetic field in the wave? , ,ε0 = 8.85 × 10-12 C2/N • m2)

If the electric field and magnetic field of an electromagnetic wave are given by and B = B0 sin(kx - ωt),and if the value of E0 is 51 µV/m,what is the value of B0? (c = 3.0 × 108 m/s)

If an electromagnetic wave has components Ey = E0 sin(kx - ωt)and Bz = B0 sin(kx - ωt),in what direction is it traveling?

If the z-component of the magnetic field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Bz(x,t)= (1.25 μT)cos[(3800 m-1)x - ,what is the largest that the y component of the electric field can be?

A 22.0-kg mirror with a surface area of 1.0 m2 and a reflectivity is bombarded by light of average intensity at an angle of to the normal of its surface.If the light has a duration of how much does the velocity of the mirror change during that time? , ,

The magnitude of the electric field at a point P for a certain electromagnetic wave is 570 N/C.What is the magnitude of the magnetic field for that wave at P? (c = 3.0 × 108 m/s)

Units,physical Quantities,and Vectors

Motion Along a Straight Line

Motion in Two or Three Dimensions

Newtons Laws of Motion

Applying Newtons Laws

Work and Kinetic Energy

Potential Energy and Energy Conservation

Momentum,impulse,and Collisions

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

Fluid Mechanics

Gravitation

Periodic Motion

Mechanical Waves

Sound and Hearing

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current,resistance,and Electromotive Force

Direct-Current Circuits

Magnetic Field and Magnetic Forces

Sources of Magnetic Field

Electromagnetic Induction

Inductance

Alternating Current

The Nature and Propagation of Light

Geometric Optics

Interference

Diffraction

Relativity

Photons: Light Waves Behaving As Particles

Particles Behaving As Waves

Quantum Mechanics

Atomic Structure

Molecules and Condensed Matter

Nuclear Physics

Particle Physics and Cosmology

Filters

Given that the wavelengths of visible light range from 400 nm to 700 nm,what is the highest frequency of visible light? (c = 3.0 × 10⁸ m/s)

The magnitude of the magnetic field at point P for a certain electromagnetic wave is 2.12 μT.What is the magnitude of the electric field for that wave at P? (c = 3.0 × 10⁸ m/s)

A laser with a power of 1.0 mW has a beam radius of 1.0 mm.What is the peak value of the electric field in that beam? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T • m/A,

The average intensity of the sunlight in Miami,Florida,is 1.04 kW/m².For surfaces on which the light is all absorbed,what is the average value of the radiation pressure due to this sunlight in Miami? μ₀ = 4π × 10^-7 T • m/A,

The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10^-10 T.What is the intensity of the wave? (c = 3.0 × 10⁸ m/s,c = 3.00 × 10⁸ m/s,μ₀ = 4π × 10^-7 T • m/A,

A planar electromagnetic wave is propagating in the +x direction.At a certain point P and at a given instant,the electric field of the wave is given by = (0.082 V/m) .What is the Poynting vector at the point P at that instant? (c = 3.0 × 10⁸ m/s,μ₀ = 4π × 10^-7 T • m/A,

The intensity of solar radiation near the earth is 1.4 kW/m².What force is exerted by solar radiation impinging normally on a 5.0 m² perfectly reflecting panel of an artificial satellite orbiting the earth? ,μ₀ = 4π × 10^-7 T • m/A,

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m².The wave is incident upon a rectangular area,1.5 m by 2.0 m,at right angles.How much total electromagnetic energy falls on the area during 1.0 minute? , ,

The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.724 W/m².What is the maximum value of the magnetic field in the wave? , ,ε₀ = 8.85 × 10^-12 C²/N • m²)

If the electric field and magnetic field of an electromagnetic wave are given by and B = B₀ sin(kx - ωt),and if the value of E₀ is 51 µV/m,what is the value of B₀? (c = 3.0 × 10⁸ m/s)

If an electromagnetic wave has components E_y = E₀ sin(kx - ωt)and B_z = B₀ sin(kx - ωt),in what direction is it traveling?

If the z-component of the magnetic field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation B_z(x,t)= (1.25 μT)cos[(3800 m^-1)x - ,what is the largest that the y component of the electric field can be?

A 22.0-kg mirror with a surface area of 1.0 m² and a reflectivity is bombarded by light of average intensity at an angle of to the normal of its surface.If the light has a duration of how much does the velocity of the mirror change during that time? , ,

The magnitude of the electric field at a point P for a certain electromagnetic wave is 570 N/C.What is the magnitude of the magnetic field for that wave at P? (c = 3.0 × 10⁸ m/s)