Q: A proton moves perpendicular to a uniform magnetic field of $$0.2\ \text{T}$$ with a speed of $$1 \times 10^6$\ \text{m/s}. $$What is the magnitude of the magnetic force on the proton? (Charge of proton $$q = 1.6 \times 10$$^{-19}$$\ \text{C})$$

$$F = 3.2 \times 10$$^{-14}$$\ \text{N}$$

Q: A solenoid has 500 turns, a length of $$0.5\ \text{m}$$, and carries a current of $$2\ \text{A}. $$What is the magnitude of the magnetic field inside the solenoid? (Use $$\mu_0$ = 4\pi \times 10$$^{-7}$$\ \text{T} \cdot \text{m/A})$$

$$B = 2.51 \times 10$$^{-3}$$\ \text{T}$$

Question 1

Which of the following statements best describes the law of conservation of electric charge?

Accepted Answer

The total electric charge in an isolated system remains constant over time.

Question 2

A point charge $$q_1 = 2$$ \ \mu	ext{C}$$ is placed 0.5 m away from a point charge q_2$ = -3 \ \mu	ext{C}. $$What is the magnitude of the electrostatic force between them? (Use $$k = 8.99 	imes 10^9$ \ 	ext{N} \cdot 	ext{m}^2/	ext{C}^2)$$

Accepted Answer

$$F = 0.216 \ 	ext{N}$$

Question 3

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

Metals have free electrons that can move easily throughout the material.

Question 4

A resistor of $$10\ \Omega is $$connected in series with a $$20\ \Omega$$ resistor and a $$12\ 	ext{V}$$ battery. What is the current in the circuit?

Accepted Answer

$$I = 0.4\ 	ext{A}$$

Question 5

Which equation correctly expresses Ohm’s Law?

Accepted Answer

$$V = IR$$

Question 6

A $$5\ \Omega$$ resistor and a $$15\ \Omega$$ resistor are connected in parallel. What is the equivalent resistance?

Accepted Answer

$$R_{eq} = 3.75\ \Omega$$

Question 7

Which of the following best describes the direction of the magnetic field around a straight current-carrying wire?

Accepted Answer

The magnetic field forms concentric circles around the wire.

Question 8

A proton moves perpendicular to a uniform magnetic field of $$0.2\ 	ext{T}$$ with a speed of $$1 	imes 10^6$\ 	ext{m/s}. $$What is the magnitude of the magnetic force on the proton? (Charge of proton $$q = 1.6 	imes 10$$^{-19}$$\ 	ext{C})$$

Accepted Answer

$$F = 3.2 	imes 10$$^{-14}$$\ 	ext{N}$$

Question 9

Which of the following is a correct statement about standing waves?

Accepted Answer

Standing waves have nodes where the displacement is always zero.

Question 10

A sound wave travels at $$340\ 	ext{m/s}$$ and has a frequency of $$1700\ 	ext{Hz}. $$What is its wavelength?

Accepted Answer

$$\lambda = 0.2\ 	ext{m}$$

Question 11

Which of the following best describes the Doppler effect for sound?

Accepted Answer

The frequency of sound increases as the source and observer move closer together.

Question 12

A double-slit experiment uses light of wavelength $$600\ 	ext{nm}$$ and the slits are $$0.2\ 	ext{mm}$$ apart. What is the angular position $$	heta of $$the first-order maximum?

Accepted Answer

$$\sin	heta = 0.003$$

Question 13

Which of the following statements about refraction is correct?

Accepted Answer

Refraction is the bending of light as it passes from one medium to another with a different refractive index.

Question 14

A ray of light 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 water?

Accepted Answer

$$22.1^\circ$$

Question 15

Which of the following best describes the strong nuclear force?

Accepted Answer

It is responsible for holding the nucleus together.

Question 16

Which type of nuclear decay results in the emission of a helium nucleus?

Accepted Answer

Alpha decay

Question 17

A radioactive isotope has a half-life of 3 hours. If you start with 80 g, how much remains after 9 hours?

Accepted Answer

10 g

Question 18

Which of the following is a real-world application of nuclear physics in medicine?

Accepted Answer

Positron emission tomography (PET) scans

Question 19

A solenoid has 500 turns, a length of $$0.5\ 	ext{m}$$, and carries a current of $$2\ 	ext{A}. $$What is the magnitude of the magnetic field inside the solenoid? (Use $$\mu_0$ = 4\pi 	imes 10$$^{-7}$$\ 	ext{T} \cdot 	ext{m/A})$$

Accepted Answer

$$B = 2.51 	imes 10$$^{-3}$$\ 	ext{T}$$

PCS 130 – Physics II: Course Outline and Syllabus Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드