Multiwall Carbon Nanotubes (MWCN)can be synthesized by heating an SiC wafer by a high power laser such as a CO2 laser.If the diameter of a laser beam of 3-kW power and 10-µm wavelength is 3 mm,what force does the laser beam exert on the SiC wafer?

A) 9.8 * 10-4 N B) 3.12 * 10-5 N C) 1.00 * 10-5 N. D) 7.50 * 10-6 N A) 9.8 * 10-4 N B) 3.12 * 10-5 N C) 1.00 * 10-5 N. D) 7.50 * 10-6 N

The unit of the quantity $\varepsilon$0(d$\varPhi$E/dt)is

A) amperes. B) volts. C) ampere.meters. D) volt.meters. A) amperes. B) volts. C) ampere.meters. D) volt.meters.

A laser beam is reflected back from a totally reflecting sail on a spacecraft that is 4.5 * 107 m from the source of the beam.How long after the beam is sent does it return to the source?

A) 100 ms B) 200 ms C) 150 ms D) 300 ms A) 100 ms B) 200 ms C) 150 ms D) 300 ms

Exam 31: Electromagnetic Waves

Explore all topics

A laser having with a spot 1.00 mm in diameter is shone perpendicularly on the center of a thin,perfectly reflecting circular (2.00 mm in diameter)aluminum plate mounted vertically on a flat piece of cork that floats on the surface of the water in a large beaker.The mass of this "sailboat" is 0.0550 g and it travels 3.00 mm in 50.0 s.Assuming that the laser power is constant in the region where the sailboat is located during the experiment,what is the power of the laser used in this demonstration? (Neglect air resistance and the viscosity of the water.)

(Multiple Choice)

4.9/5

(78)

Question 61

Multiwall Carbon Nanotubes (MWCN)can be synthesized by heating an SiC wafer by a high power laser such as a CO₂ laser.If the diameter of a laser beam of 3-kW power and 10-µm wavelength is 3 mm,what force does the laser beam exert on the SiC wafer?

(Multiple Choice)

5.0/5

(74)

Question 62

The power of a light bulb is 100 W on a circular disk of radius 2 mm at a distance of 1m.What is the power on a 4-mm disk at a distance of 2 m from the same bulb?

(Multiple Choice)

4.8/5

(82)

Question 63

A parallel plate capacitor with radius 21 cm is connected in series 15-V battery.A switch is thrown which causes the capacitor to discharge through a 150- $\varOmega$ resistor.What is the magnetic field 1.0 cm from the axis defined by the centers of the plates at this time?

(Multiple Choice)

4.8/5

(74)

Question 64

The current flowing in a 20-cm long and 2-cm radius solenoid having 500 turns decreases from 3 A to 1 A in 0.1 seconds.Determine the magnitude of the induced electric field inside the solenoid 1-cm from its center.

(Multiple Choice)

4.9/5

(90)

Question 65

A cell phone transmits 2.0 W of power at 380 MHz in a spherical pattern.What is the rms value of the electric field on the electron in the receiving antenna,located 3.0 km away?

(Multiple Choice)

4.7/5

(78)

Question 66

The potential across a 10 mF capacitor is increasing at a constant rate.If the displacement current through the capacitor is 10.0 A,what is the rate at which the potential difference is increasing across the capacitor's plates.

(Multiple Choice)

4.7/5

(80)

Question 67

Laser light with an intensity of 40,000 W/m² perpendicularly hits a black perfect absorber rectangular area of width W = 27 mm and height H = 35 mm.What is the force this laser exerts on the area?

(Multiple Choice)

5.0/5

(85)

Question 68

The unit of the quantity $\varepsilon$ ₀(d $\varPhi$ _E/dt)is

(Multiple Choice)

4.9/5

(87)

Question 69

What creates magnetic fields?

(Multiple Choice)

4.7/5

(70)

Question 70

What is the direction of the net force on the moving charge in figure shown?

(Multiple Choice)

4.7/5

(76)

Question 71

A laser beam is reflected back from a totally reflecting sail on a spacecraft that is 4.5 * 10⁷ m from the source of the beam.How long after the beam is sent does it return to the source?

(Multiple Choice)

4.7/5

(73)

Question 72

In outer space,there are two astronauts at rest,one 20.0 m from the space shuttle and the other 40.0 m away from the shuttle.By using a 20 W laser,the astronaut located 40.0 m away from the shuttle decides to propel the other astronaut towards the space shuttle.He focuses the laser on a piece of totally reflecting fabric on her space suit.What is her total mass with equipment if her resulting acceleration is 1.6 * 10^-9 m/s² towards the shuttle?

(Multiple Choice)

4.8/5

(71)

Question 73

A 5-mW laser pointer has a beam diameter of 3 mm.What is the total electromagnetic energy in a 2.0 m length of this laser beam?

(Multiple Choice)

4.9/5

(90)

Question 74

Showing 61 - 74 of 74

Exam 31: Electromagnetic Waves

Multiwall Carbon Nanotubes (MWCN)can be synthesized by heating an SiC wafer by a high power laser such as a CO2 laser.If the diameter of a laser beam of 3-kW power and 10-µm wavelength is 3 mm,what force does the laser beam exert on the SiC wafer?

The power of a light bulb is 100 W on a circular disk of radius 2 mm at a distance of 1m.What is the power on a 4-mm disk at a distance of 2 m from the same bulb?

A parallel plate capacitor with radius 21 cm is connected in series 15-V battery.A switch is thrown which causes the capacitor to discharge through a 150- Ω\varOmegaΩ resistor.What is the magnetic field 1.0 cm from the axis defined by the centers of the plates at this time?

The current flowing in a 20-cm long and 2-cm radius solenoid having 500 turns decreases from 3 A to 1 A in 0.1 seconds.Determine the magnitude of the induced electric field inside the solenoid 1-cm from its center.

A cell phone transmits 2.0 W of power at 380 MHz in a spherical pattern.What is the rms value of the electric field on the electron in the receiving antenna,located 3.0 km away?

The potential across a 10 mF capacitor is increasing at a constant rate.If the displacement current through the capacitor is 10.0 A,what is the rate at which the potential difference is increasing across the capacitor's plates.

Laser light with an intensity of 40,000 W/m2 perpendicularly hits a black perfect absorber rectangular area of width W = 27 mm and height H = 35 mm.What is the force this laser exerts on the area?

The unit of the quantity ε\varepsilonε 0(d Φ\varPhiΦ E/dt)is

What creates magnetic fields?

What is the direction of the net force on the moving charge in figure shown?

A laser beam is reflected back from a totally reflecting sail on a spacecraft that is 4.5 * 107 m from the source of the beam.How long after the beam is sent does it return to the source?

A 5-mW laser pointer has a beam diameter of 3 mm.What is the total electromagnetic energy in a 2.0 m length of this laser beam?

Overview

Motion in a Straight Line

Motion in Two and Three Dimensions

Force

Kinetic Energy, work, and Power

Potential Energy and Energy Conservation

Momentum and Collisions

Systems of Particles and Extended Objects

Circular Motion

Rotation

Static Equilibrium

Gravitation

Solids and Fluids

Oscillations

Waves

Sound

Temperature

Heat and the First Law of Thermodynamics

Ideal Gases

The Second Law of Thermodynamics

Electrostatics

Electric Fields and Gausss Law

Electric Potential

Capacitors

Current and Resistance

Direct Current Circuits

Magnetism

Magnetic Fields of Moving Charges

Electromagnetic Induction

Alternating Current Circuits

Geometric Optics

Lenses and Optical Instruments

Wave Optics

Relativity

Quantum Physics

Quantum Mechanics

Atomic Physics

Elementary Particle Physics

Nuclear Physics

Filters

Multiwall Carbon Nanotubes (MWCN)can be synthesized by heating an SiC wafer by a high power laser such as a CO₂ laser.If the diameter of a laser beam of 3-kW power and 10-µm wavelength is 3 mm,what force does the laser beam exert on the SiC wafer?

A parallel plate capacitor with radius 21 cm is connected in series 15-V battery.A switch is thrown which causes the capacitor to discharge through a 150- $\varOmega$ resistor.What is the magnetic field 1.0 cm from the axis defined by the centers of the plates at this time?

Laser light with an intensity of 40,000 W/m² perpendicularly hits a black perfect absorber rectangular area of width W = 27 mm and height H = 35 mm.What is the force this laser exerts on the area?

The unit of the quantity $\varepsilon$ ₀(d $\varPhi$ _E/dt)is

A laser beam is reflected back from a totally reflecting sail on a spacecraft that is 4.5 * 10⁷ m from the source of the beam.How long after the beam is sent does it return to the source?