Question 1

When a voltage of 15 V is applied to a resistance of 3 ohms, the resulting current is

Accepted Answer

A)  0.333 A 
B)  5 A 
C)  45 A 
A)  0.333 A 
B)  5 A 
C)  45 A B

Question 2

For those materials or devices that obey Ohm's Law, a graph of their voltage against current results in a

Accepted Answer

A)  straight-line graph 
B)  non-linear graph 
A)  straight-line graph 
B)  non-linear graph A

Question 3

When a voltage of 12 V is applied across a resistance of 10 ohms, a current of 1.2 A results. Does this resistance obey Ohm's Law?

Accepted Answer

A)  yes 
B)  no 
C)  there is not enough information to tell 
A)  yes 
B)  no 
C)  there is not enough information to tell C

Question 4

Not all materials or devices obey Ohm's Law. Those that do, are termed

Accepted Answer

A)  linear or ohmic 
B)  non-linear or non-ohmic 
C)  insulators 
D)  electrolytes 
A)  linear or ohmic 
B)  non-linear or non-ohmic 
C)  insulators 
D)  electrolytes

Question 5

Does a tungsten lamp filament obey Ohm's Law?

Accepted Answer

A)  Yes, because it is a pure metal conductor 
B)  No, because its resistance increases significantly as the voltage applied across it increases 
A)  Yes, because it is a pure metal conductor 
B)  No, because its resistance increases significantly as the voltage applied across it increases

Question 6

The ratio of voltage to current represents the __________ of a material or device, regardless of whether or not it obeys Ohm's Law

Accepted Answer

A)  conductance 
B)  resistance 
C)  resistivity 
A)  conductance 
B)  resistance 
C)  resistivity

Question 7

When a current of 3 A passes through a resistance of 75 ohms, the voltage across that resistance must be

Accepted Answer

A)  0.04 V 
B)  25 ohms 
C)  225 ohms 
A)  0.04 V 
B)  25 ohms 
C)  225 ohms

Question 8

When a voltage of 200 V is applied across a circuit, the resulting current is 5 A. When the voltage is increased to 300 V, the resulting current is 7.5A. Does the circuit probably obey Ohm's Law?

Accepted Answer

A)  Yes, because the ratio of voltage to current remains constant for a change in voltage 
B)  No, because a change in voltage results in a different value of current 
A)  Yes, because the ratio of voltage to current remains constant for a change in voltage 
B)  No, because a change in voltage results in a different value of current

Question 9

When a voltage of 200 V results in a current of 2.5 A, the resistance of circuit is

Accepted Answer

A)  500 ohms 
B)  80 ohms 
C)  12.5 milliohms 
A)  500 ohms 
B)  80 ohms 
C)  12.5 milliohms

Question 10

Which of the following statement most accurately describes Ohm's Law?

Accepted Answer

A)  The current flowing through a conductor is proportional to the voltage across that conductor 
B)  The current flowing through a conductor is equal to the voltage across that conductor, divided by its resistance 
C)  The ratio of voltage to current is constant for variations in voltage 
A)  The current flowing through a conductor is proportional to the voltage across that conductor 
B)  The current flowing through a conductor is equal to the voltage across that conductor, divided by its resistance 
C)  The ratio of voltage to current is constant for variations in voltage

When a voltage of 15 V is applied to a resistance of 3 ohms, the resulting current is

For those materials or devices that obey Ohm's Law, a graph of their voltage against current results in a

When a voltage of 12 V is applied across a resistance of 10 ohms, a current of 1.2 A results. Does this resistance obey Ohm's Law?

Not all materials or devices obey Ohm's Law. Those that do, are termed

Does a tungsten lamp filament obey Ohm's Law?

The ratio of voltage to current represents the __________ of a material or device, regardless of whether or not it obeys Ohm's Law

When a current of 3 A passes through a resistance of 75 ohms, the voltage across that resistance must be

When a voltage of 200 V is applied across a circuit, the resulting current is 5 A. When the voltage is increased to 300 V, the resulting current is 7.5A. Does the circuit probably obey Ohm's Law?

When a voltage of 200 V results in a current of 2.5 A, the resistance of circuit is

Which of the following statement most accurately describes Ohm's Law?

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Practical Conductors and Insulators

Effect of Temperature Change Upon Resistance

Series, Parallel and Series-Parallel Circuits

Cells and Batteries

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters

Exam 7: Ohms Law of Constant Proportionality

When a voltage of 15 V is applied to a resistance of 3 ohms, the resulting current is

For those materials or devices that obey Ohm's Law, a graph of their voltage against current results in a

When a voltage of 12 V is applied across a resistance of 10 ohms, a current of 1.2 A results. Does this resistance obey Ohm's Law?

Not all materials or devices obey Ohm's Law. Those that do, are termed

Does a tungsten lamp filament obey Ohm's Law?

The ratio of voltage to current represents the __________ of a material or device, regardless of whether or not it obeys Ohm's Law

When a current of 3 A passes through a resistance of 75 ohms, the voltage across that resistance must be

When a voltage of 200 V is applied across a circuit, the resulting current is 5 A. When the voltage is increased to 300 V, the resulting current is 7.5A. Does the circuit probably obey Ohm's Law?

When a voltage of 200 V results in a current of 2.5 A, the resistance of circuit is

Which of the following statement most accurately describes Ohm's Law?

The Electron Theory of Electricity

Electric Current

Potential and Potential Difference

Resistance

Practical Conductors and Insulators

Effect of Temperature Change Upon Resistance

Series, Parallel and Series-Parallel Circuits

Cells and Batteries

Internal Resistance of Voltage Sources

Energy, Work, Heat and Power

Magnetism

Electromagnetism

Magnetic Circuits

Electromagnetic Induction

Capacitors and Capacitance

Introduction to Alternating Current

Series Alternating-Current Circuits

Power in Alternating-Current Circuits

Parallel Alternating-Current Circuits

Power Factor Improvement

Balanced Three-Phase Ac Systems

Filters