Q: Which of the following best describes the energy levels of electrons in a hydrogen atom according to the Bohr model?

They are quantized and given by $$E_n = -13.6 \ \text{eV}/n^2$

Q: A patient receives an X-ray with a wavelength of $$0.1\ \text{nm}. $$What is the energy of a single photon of this X-ray? ($$h = 6.63 \times 10$$^{-34}$$\ \text{J} \cdot \text{s}$$, $$c = 3.00 \times 10^8$\ \text{m/s})$$

$$1.99 \times 10$$^{-15}$$\ \text{J}$$

Q: A hospital MRI machine uses a magnetic field of $$1.5\ \text{T}. If a $$proton ($$q = 1.6 \times 10$$^{-19}$$\ \text{C}) $$moves perpendicular to this field at $$2.0 \times 10^5$\ \text{m/s}$$, what is the magnitude of the magnetic force on the proton?

$$4.8 \times 10$$^{-14}$$\ \text{N}$$

Question 1

A charged particle is placed in a uniform electric field. If the electric field is directed to the right and the particle is negatively charged, in which direction will the force on the particle act?

Accepted Answer

To the left

Question 2

Which of the following best describes the relationship between electric potential difference ($$\Delta V) $$and electric field ($$E) in a $$uniform field over a distance $$d$$?

Accepted Answer

$$\Delta V = -Ed$$

Question 3

A parallel-plate capacitor is connected to a battery and then disconnected. If the plates are pulled apart, what happens to the voltage across the plates?

Accepted Answer

The voltage increases

Question 4

A circuit contains a resistor ($$R) $$and a capacitor ($$C) in $$series with a battery of voltage $$V_0. $$What is the time constant $$	au$$ for the charging of the capacitor?

Accepted Answer

$$	au = RC$$

Question 5

A wire carries a current $$I to $$the right. According to the right-hand rule, what is the direction of the magnetic field directly above the wire?

Accepted Answer

Out of the page

Question 6

A solenoid with $$N$$ turns, length $$L$$, and current $$I$$ produces a magnetic field inside given by which formula?

Accepted Answer

$$B = \mu_0$ \frac{N}{L} I$$

Question 7

A bar magnet is moved toward a coil of wire. According to Faraday's Law, what is induced in the coil?

Accepted Answer

An electromotive force (emf)

Question 8

A light ray passes from air ($$n=1.00) $$into water ($$n=1.33) at an $$angle of $$30^\circ to $$the normal. What is the angle of refraction in the water?

Accepted Answer

$$22.1^\circ$$

Question 9

Which equation describes the condition for constructive interference in a double-slit experiment?

Accepted Answer

$$d \sin 	heta = m \lambda$$

Question 10

A converging lens forms a real image of an object placed outside its focal length. If the object is moved closer to the lens but still outside the focal length, what happens to the image?

Accepted Answer

The image moves farther from the lens and becomes larger

Question 11

A diffraction grating is used to separate light of different wavelengths. If the number of lines per meter on the grating is increased, what happens to the angular separation between the first-order maxima for two wavelengths?

Accepted Answer

The angular separation increases

Question 12

Which of the following best describes the energy levels of electrons in a hydrogen atom according to the Bohr model?

Accepted Answer

They are quantized and given by $$E_n = -13.6 \ 	ext{eV}/n^2$

Question 13

A Carnot engine operates between a hot reservoir at $$T_H = 500 \ 	ext{K}$$ and a cold reservoir at $$T_C = 300 \ 	ext{K}. $$What is its maximum possible efficiency?

Accepted Answer

$$0.40$$

Question 14

A resistor of $$10\ \Omega$$ and a $$2\ \mu	ext{F}$$ capacitor are connected in series to a $$12\ 	ext{V}$$ battery. What is the charge on the capacitor after a long time?

Accepted Answer

$$24 \ \mu	ext{C}$$

Question 15

A ray of light strikes a mirror at an angle of $$40^\circ to $$the normal. What is the angle between the incident and reflected rays?

Accepted Answer

$$80^\circ$$

Question 16

A transformer has 100 turns on the primary coil and 500 turns on the secondary coil. If the input voltage is $$120\ 	ext{V}$$, what is the output voltage (assuming 100% efficiency)?

Accepted Answer

$$600\ 	ext{V}$$

Question 17

A patient receives an X-ray with a wavelength of $$0.1\ 	ext{nm}. $$What is the energy of a single photon of this X-ray? ($$h = 6.63 	imes 10$$^{-34}$$\ 	ext{J} \cdot 	ext{s}$$, $$c = 3.00 	imes 10^8$\ 	ext{m/s})$$

Accepted Answer

$$1.99 	imes 10$$^{-15}$$\ 	ext{J}$$

Question 18

A hospital MRI machine uses a magnetic field of $$1.5\ 	ext{T}. If a $$proton ($$q = 1.6 	imes 10$$^{-19}$$\ 	ext{C}) $$moves perpendicular to this field at $$2.0 	imes 10^5$\ 	ext{m/s}$$, what is the magnitude of the magnetic force on the proton?

Accepted Answer

$$4.8 	imes 10$$^{-14}$$\ 	ext{N}$$

Question 19

A laser beam passes through a slit of width $$a$$ and produces a central diffraction maximum on a screen. If the wavelength of the laser is doubled, what happens to the width of the central maximum?

Accepted Answer

It doubles

Question 20

A refrigerator removes $$500\ 	ext{J} of $$heat from its interior and expels $$700\ 	ext{J} to $$the room. What is the work input required?

Accepted Answer

$$200\ 	ext{J}$$

PHYS202: General Physics II – Fall 2026 Course Schedule and Topic Overview

Study Guide - Practice Questions

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