Question 1

A sound wave travels through air at a speed of $$340\ \mathrm{m/s}. If $$the frequency of the wave is $$1700\ \mathrm{Hz}$$, what is the wavelength of the sound wave?

Accepted Answer

$$0.2\ \mathrm{m}$$

Question 2

Which of the following best describes the difference between longitudinal and transverse waves?

Accepted Answer

In longitudinal waves, particle displacement is parallel to wave propagation; in transverse waves, it is perpendicular.

Question 3

A string fixed at both ends vibrates in its third harmonic. If the length of the string is $$1.2\ \mathrm{m}$$ and the wave speed is $$240\ \mathrm{m/s}$$, what is the frequency of the third harmonic?

Accepted Answer

$$300\ \mathrm{Hz}$$

Question 4

Which law states that the pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid and the walls of its container?

Accepted Answer

Pascal's Law

Question 5

A hydraulic lift has a small piston of area $$0.01\ \mathrm{m}^2$$ and a large piston of area $$0.5\ \mathrm{m}^2. If a $$force of $$200\ \mathrm{N} is $$applied to the small piston, what is the maximum weight that can be lifted by the large piston (neglecting friction)?

Accepted Answer

$$10,000\ \mathrm{N}$$

Question 6

Which of the following statements about the first law of thermodynamics is correct?

Accepted Answer

The change in internal energy of a system equals the heat added to the system minus the work done by the system.

Question 7

A gas absorbs $$500\ \mathrm{J} of $$heat and does $$200\ \mathrm{J} of $$work. What is the change in internal energy of the gas?

Accepted Answer

$$300\ \mathrm{J}$$

Question 8

Which of the following is a correct statement of Coulomb's Law?

Accepted Answer

The force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 9

A $$2\ \mathrm{\mu C}$$ charge is placed $$0.5\ \mathrm{m}$$ from a $$6\ \mathrm{\mu C}$$ charge in vacuum. What is the magnitude of the electrostatic force between them? ($$k = 9 	imes 10^9$\ \mathrm{N\cdot m^2$/C^2$$}$)

Accepted Answer

$$0.216\ \mathrm{N}$$

Question 10

Which of the following best describes the direction of the electric field created by a positive point charge?

Accepted Answer

Radially outward from the charge

Question 11

A parallel-plate capacitor is charged and then disconnected from the battery. If the plates are pulled apart so that the separation doubles, what happens to the voltage across the plates?

Accepted Answer

It doubles

Question 12

Which of the following is a correct expression for the energy stored in a capacitor with capacitance $$C$$ and voltage $$V$$?

Accepted Answer

$$\frac{1}{2}CV^2$

Question 13

A $$10\ \mathrm{\mu F}$$ capacitor is charged to $$100\ \mathrm{V}. $$How much energy is stored in the capacitor?

Accepted Answer

$$0.05\ \mathrm{J}$$

Question 14

Which of the following is true about the direction of current in a simple DC circuit?

Accepted Answer

It flows from the positive terminal to the negative terminal of the battery.

Question 15

A resistor of $$10\ \Omega is $$connected to a $$20\ \mathrm{V}$$ battery. What is the current through the resistor?

Accepted Answer

$$2\ \mathrm{A}$$

Question 16

Which of the following is a correct statement of Ohm's Law?

Accepted Answer

$$V = IR$$

Question 17

A $$60\ \mathrm{W}$$ light bulb operates on $$120\ \mathrm{V}. $$What is the current through the bulb?

Accepted Answer

$$0.5\ \mathrm{A}$$

Question 18

Which of the following best describes the function of a dielectric in a capacitor?

Accepted Answer

It increases the capacitance by reducing the electric field between the plates.

Question 19

A $$5\ \mathrm{\mu F}$$ capacitor and a $$10\ \mathrm{\mu F}$$ capacitor are connected in series. What is their equivalent capacitance?

Accepted Answer

$$3.33\ \mathrm{\mu F}$$

General Physics II (PHYS102) - Syllabus and Study Guide

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