Elex - Evaluation Exam 1 questions and
answers with solutions
a. Cork's crew rule - ANSWER The direction of magnetic lines of force around a straight current
carrying conductor may be determined by:
a. Cork's crew rule
b. Faraday's law
c. Fleming's left hand rule
d. Lenz's law
c. Static-induced emf - ANSWER If the conductor is stationary and the field is changing (varying),
then emf is induced in it. Such an emf in known as:
a. Back emf
b. Self-induced emf
c. Static-induced emf
d. Dynamically-induced emf
d. Faraday's first law of electromagnetic induction - ANSWER Which of the following law states
that "whenever the magnetic flux linked with a conductor or coil changes, an emf is induced in
it"?
a. Faraday's second law of electromagnetic induction
b. Lenz's Law
c. Fleming's right hand rule
d. Faraday's first law of electromagnetic induction
,c. Maxwell's fourth equation - ANSWER Which of the following is based on Ampere's circuit
law?
a. Maxwell's third equation
b. Maxwell's first equation
c. Maxwell's fourth equation
d. Maxwell's second equation
a. current and no voltage - ANSWER 1. Which one of the following is generally not a possible
condition in an electric circuit?
a. current and no voltage
b. voltage and current
c. voltage and no current
d. no voltage and no current
b. 20 A - ANSWER The current in a given circuit is not to exceed 22 A. Which value of fuse is
best?
a. a fuse is not necessary
b. 20 A
c. 25 A
d. 10 A
b. at any point in the circuit - ANSWER To measure the current out of the third resistor in a
circuit consisting of four series resistors, an ammeter can be placed
, a. at the positive terminal of the source
b. at any point in the circuit
c. between the second and third resistors
d. between the third and fourth resistors
b. dimmer than normal - ANSWER While putting four 1.5 V batteries in a flashlight, you
accidentally put one of them in backward. The light will be
a. brighter than normal
b. dimmer than normal
c. the same
d. off
a. 10 mA - ANSWER In a four-branch parallel circuit, there are 10 mA of current in each branch.
If one of the branches opens, the current in each of the other three branches is
a. 10 mA
b. 0 A
c. 13.33 mA
d. 30 mA
b. the fuse in the power supply will blow - ANSWER A complete short develops across one of
five parallel resistors on a PC board. The most likely result is
a. the smallest-value resistor will burn out
b. the fuse in the power supply will blow
c. one or more of the other resistors will burn out
answers with solutions
a. Cork's crew rule - ANSWER The direction of magnetic lines of force around a straight current
carrying conductor may be determined by:
a. Cork's crew rule
b. Faraday's law
c. Fleming's left hand rule
d. Lenz's law
c. Static-induced emf - ANSWER If the conductor is stationary and the field is changing (varying),
then emf is induced in it. Such an emf in known as:
a. Back emf
b. Self-induced emf
c. Static-induced emf
d. Dynamically-induced emf
d. Faraday's first law of electromagnetic induction - ANSWER Which of the following law states
that "whenever the magnetic flux linked with a conductor or coil changes, an emf is induced in
it"?
a. Faraday's second law of electromagnetic induction
b. Lenz's Law
c. Fleming's right hand rule
d. Faraday's first law of electromagnetic induction
,c. Maxwell's fourth equation - ANSWER Which of the following is based on Ampere's circuit
law?
a. Maxwell's third equation
b. Maxwell's first equation
c. Maxwell's fourth equation
d. Maxwell's second equation
a. current and no voltage - ANSWER 1. Which one of the following is generally not a possible
condition in an electric circuit?
a. current and no voltage
b. voltage and current
c. voltage and no current
d. no voltage and no current
b. 20 A - ANSWER The current in a given circuit is not to exceed 22 A. Which value of fuse is
best?
a. a fuse is not necessary
b. 20 A
c. 25 A
d. 10 A
b. at any point in the circuit - ANSWER To measure the current out of the third resistor in a
circuit consisting of four series resistors, an ammeter can be placed
, a. at the positive terminal of the source
b. at any point in the circuit
c. between the second and third resistors
d. between the third and fourth resistors
b. dimmer than normal - ANSWER While putting four 1.5 V batteries in a flashlight, you
accidentally put one of them in backward. The light will be
a. brighter than normal
b. dimmer than normal
c. the same
d. off
a. 10 mA - ANSWER In a four-branch parallel circuit, there are 10 mA of current in each branch.
If one of the branches opens, the current in each of the other three branches is
a. 10 mA
b. 0 A
c. 13.33 mA
d. 30 mA
b. the fuse in the power supply will blow - ANSWER A complete short develops across one of
five parallel resistors on a PC board. The most likely result is
a. the smallest-value resistor will burn out
b. the fuse in the power supply will blow
c. one or more of the other resistors will burn out
