Question 1

Which of the following statements best describes the difference between conductors and insulators in terms of electric charge?

Accepted Answer

Conductors allow electric charges to move freely, while insulators restrict the movement of charges.

Question 2

A proton and an electron are separated by a distance of $$1.0 	imes 10$$^{-10}$$ m. What is the magnitude of the electric force between them? (Use k = 8.99$$ 	imes $$10^9 N$$·m$$^2/C$^2$$, $$e = 1.60 	imes 10$$^{-19}$$ C)

Accepted Answer

$$2.3 	imes 10$$^{-8}$$ N

Question 3

Which equation correctly expresses Coulomb’s law for the force between two point charges $$q_1$$ and $$q_2$$ separated by a distance $$r$$?

Accepted Answer

$$F = k \frac{|q_1$ q_2$|}{r^2$}$$

Question 4

A parallel plate capacitor is charged and then disconnected from the battery. If a dielectric is inserted between the plates, what happens to the capacitance and the voltage across the plates?

Accepted Answer

Capacitance increases, voltage increases.

Question 5

Which of the following best describes the relationship between electric potential ($$V) $$and electric field ($$E$$)?

Accepted Answer

$$E = -
abla V$$

Question 6

A 12 V battery is connected to a resistor of $$4 \Omega. $$What is the current through the resistor?

Accepted Answer

$$3 A$$

Question 7

Which equation represents Ohm’s law?

Accepted Answer

$$V = IR$$

Question 8

Two resistors, $$R_1 = 2$$ \Omega$$ and R_2$ = 6 \Omega$$, are connected in parallel. What is their equivalent resistance?

Accepted Answer

$$1.5 \Omega$$

Question 9

A charged particle moves perpendicular to a uniform magnetic field. Which force acts on the particle, and what is its direction?

Accepted Answer

A magnetic force acts perpendicular to both the velocity and the magnetic field.

Question 10

A wire carries a current of $$I = 5 A $$and is placed in a magnetic field of $$B = 0.2 T $$perpendicular to the wire. If the length of the wire in the field is $$0.4 m$$, what is the magnitude of the force on the wire?

Accepted Answer

$$0.4 N$$

Question 11

Which law states that the induced emf in a circuit is proportional to the rate of change of magnetic flux through the circuit?

Accepted Answer

Faraday’s law

Question 12

A transformer has a primary coil with 100 turns and a secondary coil with 500 turns. If the input voltage is 120 V, what is the output voltage?

Accepted Answer

$$600 V$$

Question 13

A sound wave travels through air at a speed of $$340 m/s. If $$its frequency is $$680 Hz$$, what is its wavelength?

Accepted Answer

$$0.5 m$$

Question 14

Which equation describes the relationship between the speed ($$v$$), frequency ($$f$$), and wavelength ($$\lambda) of a $$wave?

Accepted Answer

$$v = f \lambda$$

Question 15

A light ray passes from air ($$n = 1.0) $$into glass ($$n = 1.5) at an $$angle of $$30^\circ to $$the normal. What is the angle of refraction in the glass?

Accepted Answer

$$19.5^\circ$$

Question 16

Which equation represents Snell’s law for refraction?

Accepted Answer

$$n_1$$ \sin \$$theta_1$$ = $$n_2$$ \sin \$$theta_2$$

Question 17

Which phenomenon explains the formation of bright and dark fringes in the double-slit experiment?

Accepted Answer

Interference

Question 18

According to the photon model of light, which equation relates the energy of a photon to its frequency?

Accepted Answer

$$E = h f$$

Question 19

Which principle states that it is impossible to simultaneously know both the exact position and momentum of a particle?

Accepted Answer

Heisenberg uncertainty principle

Physics II with Calculus: Syllabus and Weekly Topic Guide

Guida di studio - Domande di pratica

Study guide - Flashcard