Question 1

The three effects of an electric current are the&#10;A) chemical, heating, and lighting effects.&#10;B) heating, lighting, and sound effects.&#10;C) lighting, magnetic, and sound effects.&#10;D) magnetic, chemical, and heating effects.

Accepted Answer

The three effects of an electric current are magnetic, chemical, and heating effects. Magnetic effects are observed when electric current creates a magnetic field around a conductor. Chemical effects occur in processes like electrolysis, where electric current causes a chemical reaction. Heating effects are seen when electric current passing through a conductor generates heat due to resistance.

Question 2

The SI definition of an ampere is based on the current's&#10;A) chemical effect.&#10;B) heating effect.&#10;C) magnetic effect.&#10;D) lighting effect.

Accepted Answer

The SI definition of an ampere is based on the magnetic effect. It is defined as the constant current that, if maintained in two straight parallel conductors of infinite length and negligible cross-sectional area, placed one meter apart in a vacuum, would produce between these conductors a force equal to 2 x 10^-7 newtons per meter of length.

Question 3

The SI symbol for the ampere is:&#10;A) amp&#10;B) A&#10;C) a&#10;D) I

Accepted Answer

The SI symbol for the ampere is "A".

Question 4

A coulomb is used to measure the&#10;A) rate of flow of current.&#10;B) rate of flow of charge.&#10;C) quantity of charge.&#10;D) quantity of electrons.

Accepted Answer

Coulomb is a unit of electric charge, representing the quantity of charge transported by a constant current of one ampere in one second. It is not used to measure the rate of flow of current or quantity of electrons, but rather the total quantity of charge.

Question 5

A coulomb is equivalent to&#10;A) an ampere per second.&#10;B) an ampere second.&#10;C) 6.24 x 10-18 electrons.&#10;D) the charge on 6.24 x 10-18 electrons.

Accepted Answer

A coulomb is defined as the amount of electric charge carried by a current of one ampere flowing for one second, which is equivalent to an ampere second. Therefore, choice B is the correct answer. Choice A is not correct as it describes the rate of flow of electric charge, not the amount. Choice C is not correct as it describes the number of electrons, not the amount of charge. Choice D is also not correct as it only describes the charge on a specific number of electrons, not the amount of charge in one coulomb.

Question 6

The amount of charge transported by a current of 12 mA during a period of 3 s is:&#10;A) 36 mC&#10;B) 250 mC&#10;C) 4 C&#10;D) 36 C

Accepted Answer

The amount of charge transported is given by the formula Q=I*t, where Q is the charge in Coulombs, I is the current in Amperes, and t is the time in seconds. 
Substituting I=12 mA=0.012 A and t=3 s, we get 
Q=0.012 A * 3 s = 0.036 C = 36 mC. 
Therefore, the correct choice is A.

Question 7

15 mC of charge is transported past a point in a circuit for 5 min. The current flowing during that period is&#10;A) 50 microamperes&#10;B) 3 milliamperes&#10;C) 50 milliamperes&#10;D) 3 amperes

Accepted Answer

The answer of 15 mC of charge is transported past...

Deck 2: Electric Current