Physics 2 Final MCQ

A resistor, capacitor, and inductor are connected in series across an AC generator. Which one of the following statements is true?

All the power is lost in the resistor

A light ray containing both blue and red wavelengths is incident at an angle on a slab of glass. Which of the sketches in the figure below represents the most likely outcome?

C

Light can travel from air into water. Some possible paths for the light ray in the water are shown in the figure below. Which path will the light most likely follow?

C

What is the impedance of a series RLC circuit at resonance?

R

The switch in the circuit shown in the figure below is closed, and the lightbulb glows steadily. The inductor is a simple air-core solenoid. An iron rod is inserted into the interior of the solenoid, increasing the magnitude of the magnetic field in the solenoid. As the rod is inserted, the brightness of the lightbulb:

decreases

As light travels from a vacuum (n = 1) to a medium such as glass (n > 1), which of the following properties remains the same?

frequency

In which one of the following lists are different types of electromagnetic waves ranked in order of increasing wavelength?

gamma rays, x-rays, visible light, radio waves

If the glass is replaced by a transparent material with smaller index of refraction than that of glass, the refraction angle θ2 will be:

larger

The figure below shows light from material A with index of refraction nA entering materials B and C with indices of refraction nB and nC. Rank the three indices of refraction from largest to smallest.

nB > nA > nC OR nA > nB > nC

A light ray travels through three parallel slabs having different indices of refraction as in the following figure. The rays shown are only the refracted rays. Rank the materials according to the size of their indices of refraction, from largest to smallest.

na > nc > nb

In an RLC circuit, the magnitude of the instantaneous current is:

sometimes larger than the rms current and sometimes smaller

A horizontal metal bar oriented east-west drops straight down in a location where the Earth's magnetic field is due north. As a result, an emf develops between the ends. Which end is positively charged?

the east end

For the circuit of the figure below, what is the instantaneous voltage equal to?

the sum of the instantaneous voltages across the element

If light with wavelength λ in glass passes into water with index nw, the new wavelength of the light is:

λng/nw

If the voltage is stepped up to double the amount in this problem, by what factor is the percentage power loss changed?

1/4

If the frequency is doubled, the maximum induced emf is multiplied by:

2

Which of the following changes in a purely capacitive AC circuit would increase its capacitive reactance?

-A decrease in frequency -A decrease in Capacitance

Which of the following statements are true regarding electromagnetic waves traveling through a vacuum?

-All waves travel at 3.00 108 m/s. -The electric and magnetic fields associated with the waves are perpendicular to each other and to the direction of wave propagation

Which of the following statements are true about light waves?

-The shorter the wavelength, the higher the frequency. -The lower the frequency, the longer the wavelength

Which of the following changes in a purely inductive AC circuit would increase its inductive reactance?

-an increase in frequency -an increase in inductance

The rms current in an AC circuit

-measures the magnitude of the current, as a special kind of average. -is the direct current that dissipates energy at the same rate as the AC current.