Question

1 of 20

Which of the following is the most accurate statement concerning charge?

a	Charge is one of the seven fundamental dimensions found in nature.
b	Charge is a derived dimension (current • time), with SI units of Coulombs.
c	Charge is a derived dimension (current • time), with SI units of amperes.
d	Charge is a fundamental quantity found in all elementary particles such as protons, electrons, and neutrons.
e	The electrical force between two charges is directly proportional to the distance between the two charges.

Question

2 of 20

Which of the following is the most accurate statement concerning electrical force?

a	Electrical force is a derived dimension, with SI units of Newton/meter.
b	In most cases, the electrical force between two particles is roughly equivalent to the gravitational force between the particles, but opposite in direction.
c	Electrical force is one of the seven fundamental dimensions, with SI units of Newton.
d	Electrical force obeys the inverse square law.
e	Like the gravitational force, the electrical force is always attractive, never repulsive.

Question

3 of 20

Which of the following is the most accurate statement concerning the first law of thermodynamics?

a	The first law of thermodynamics describes the relationship between systems in thermal equilibrium.
b	The first law of thermodynamics describes the relationship between heat, work, and internal energy in a thermodynamic system.
c	The first law of thermodynamics describes the conservation of energy in an open thermodynamic system.
d	The first law of thermodynamics describes the conservation of energy in a closed thermodynamic system.
e	More than one of given statements are accurate.

Question

4 of 20

What is the most accurate statement concerning the second law of thermodynamics?

a	The Carnot cycle involves an isothermal expansion followed by an isobaric compression. The efficiency of this partial cycle is normally about 96%.
b	The second law of thermodynamics requires heat to flow spontaneously from a cooler object to a warmer object. This is the basis for a refrigerator.
c	A closed thermodynamic system absorbs heat at a high temperature and then converts the heat absorbed into useful work at a lower temperature.
d	An isothermal process requires the temperature and pressure in a closed thermodynamic system to remain constant.
e	No cyclic thermodynamic process can convert heat completely into mechanical work.

Question

5 of 20

What is the most accurate statement concerning the relationship between entropy and the second law of thermodynamics?

a	Entropy provides a quantitative measure of the disorder of a system.
b	Entropy is equal to the ratio of the heat added to a system and the absolute temperature of the system.
c	Like energy, entropy is required to be conserved in both reversible and irreversible thermodynamic processes.
d	More than one of these statements (a, b or c) are accurate.
e	None of the statements (a, b or c) is accurate.

Question

6 of 20

If you run a Carnot heat engine in reverse, which of the following statements must be true?

a	Heat enters the gas at the cold reservoir and goes out of the gas at the hot reservoir.
b	The amount of heat transferred at the hot reservoir is equal to the amount of heat transferred at the cold reservoir.
c	The engine is able to perform a net amount of useful work, such as pumping water from a well, during each cycle.
d	The engine can transfer heat from a cold object to a hot object.
e	More than one of the above statements are true.

Question

7 of 20

What is the most accurate statement concerning Gauss's law?

a	Gauss's law provides a quantitative relationship between the electric field established and the quantity of charge present when two point charges form a dipole.
b	Gauss's law provides a quantitative relationship between the scalar nature of electric force and the vector nature of electric flux.
c	Gauss's law provides a quantitative relationship between electric charge and the electric field associated with the electric charges enclosed on the surface of a three-dimensional object like a sphere.
d	Gauss's law uses superposition to estimate the scalar difference between lines of electric flux entering or leaving a closed two-dimensional surface.
e	More than one of the statements (a, b, c or d) are accurate.

Question

8 of 20

If the electric field is "E" at a distance "d" from a point charge, its magnitude will be 2E at a distance______

a	d/4.
b	d/2.
c	d/?2.
d	d ? 2.
e	2d.

Question

9 of 20

Two protons close to each other are released from rest and are completely free to move. After being released, which statement(s) is/are accurate?

a	Their speeds gradually decrease to zero as they move apart.
b	Their speeds gradually increase as they move apart.
c	Their accelerations gradually increase as they move apart.
d	Their accelerations gradually decrease to zero as they move apart.
e	More than one of the statements (a, b, c or d) are accurate.

Answer 1

PART (1):

Correct option is (b) Charge is a derived dimension (current x time), with SI units of Coulombs.

PART (2):

Correct option is (d) Electrical force obeys the inverse square law.

PART (3):

The correct statements are:

• The first law of thermodynamics describes the relationship between heat, work, and internal energy in a thermodynamic system.
• The first law of thermodynamics describes the conservation of energy in an open thermodynamic system.

Correct option is (e) More than one of given statements are accurate.

PART (4):

Correct option is (e) No cyclic thermodynamic process can convert heat completely into mechanical work.

PART (5):

The correct statements are:

• Entropy provides a quantitative measure of the disorder of a system.
• Entropy is equal to the ratio of the heat added to a system and the absolute temperature of the system.

Correct option is (d) More than one of these statements (a, b or c) are accurate.

PART (6):

The correct statements are:

• Heat enters the gas at the cold reservoir and goes out of the gas at the hot reservoir.
• The engine can transfer heat from a cold object to a hot object.

Correct option is (e) More than one of the above statements are true.

PART (7):

Correct option is (c) Gauss's law provides a quantitative relationship between electric charge and the electric field associated with the electric charges enclosed on the surface of a three-dimensional object like a sphere.

PART (8):

Correct option is (c) d/√2

PART (9):

The correct statements are:

• Their speeds gradually increase as they move apart.
• Their accelerations gradually decrease to zero as they move apart.

Correct option is (e) More than one of the statements (a, b, c or d) are accurate.

(In case you need more explanations, please let me know via comments. Please remember to specify the question number)