# Physics B Final exam

### 40 terms by SIUCJoeMed

#### Study  only

Flashcards Flashcards

Scatter Scatter

Scatter Scatter

## Create a new folder

### A -4.0-C charge is located 0.45 m to the left of a +6.0-C charge. What is the magnitude and direction of the electrostatic force on the positive charge?

1.1 N to the left

### Complete the following statement: The magnitude of the electric field at a point in space does not depend upon

the sign of the charge causing the field

### Which one of the following figures shows a qualitatively accurate sketch of the electric field lines in and around this system?

wide arrows going out

-2.1 x 10^-14 J

### Which one of the following changes will necessarily increase the capacitance of a capacitor?

placing a dielectric between the plates

7.5 x 10^8 m

### Which one of the following statements concerning resistors in series is true?

The current through each resistor is the same

5.7V

### Which one of the following statements concerning capacitors of unequal capacitance connected in series is true?

The total voltage supplied by the battery is the sum of the voltages across each capacitor

2 ohms

### A charged particle is moving in a uniform, constant magnetic field. Which one of thefollowing statements concerning the magnetic force exerted on the particle is false?

The magnetic force increases the speed of the particle

### An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper as shown. Which one of the following phrases most accurately describes the motion of the electron once it has entered the field?

Downward and circular

5.3 A

### A long, straight wire is in the same plane as a rectangular, conducting loop. The wire carriesa constant current I as shown in the figure. Which one of the following statements is true if the wire is suddenly moved toward the loop?

There will be an induced current that is counterclockwise around the loop

80

### Which one of the following statements concerning electromagnetic waves is false?

X-rays have longer wavelengths than radio waves

.359 m

So/8

83 W/m²

### Which one of the following statements is not a characteristic of a plane mirror?

The image is real

30.0cm

### An object is placed 20 cm in front of a concave spherical mirror that has a radius of curvature 60 cm. Which one of the following phrases best describes the image?

virtual and located 60cm from the mirror

C ethyl alcohol

53.3cm

1.0 m

### Two identical light waves, A and B, are emitted from different sources and meet at a point P. The distance from the source of A to the point P is LA; and the source of B is a distance LB from P. Which one of the following statements is necessarily true concerning the interference of the two waves?

A and B will interfere constructly if LA=LB

204 nm

2.95 x 10^-4 m

### Visible light of wavelength 589 nm is incident on a diffraction grating that has 3500 lines/cm. At what angle with respect to the central maximum is the fifth order maximum observed?

A fifth order maximum cannot be observed

### Complete the following statement: The Michelson-Morley experiment

indicated that the speed of light is the same in all inertial reference frames

### A digital wireless telephone communicates to a base via microwaves with a frequency of 1930 MHz. What are the momentum and energy for the microwave photons emitted by the telephone? momentum photon energy

4.27x10^-33 kg m/s 1.28x10^-24J

1.7x10^-17J

Wolfgang Pauli

3

### An electron makes a transition from a higher energy state to a lower one without any external provocation. As a result of the transition, a photon is emitted and moves in a random direction. What is the name of this emission process?

spontaneous emission

.968c

### Complete the following statement: The results of special relativity indicate that

Newtonian mechanics is a valid approx at low speeds (v<<c)

frequency

### Complete the following statement: An individual copper atom emits electromagnetic radiation with wavelengths that are

unique to all copper atoms

Example:

## Press Ctrl-0 to reset your zoom

### Please upgrade Flash or install Chrometo use Voice Recording.

For more help, see our troubleshooting page.

Create Set