ECE 1004 Final Multiple Choice Problems 100% Verified
what switching technique is used to power LEDs in practice? - ANSWER pulse with
modulation
which of the following stores magnetic field energy? - ANSWER core
the "positive side of a diode is called what? - ANSWER anode
how does a capacitor act when you first charge it up? - ANSWER short
coupling capacitors do what? - ANSWER pass signals
what is the most common use for a electrolytics? - ANSWER power supplies
how many rows are in a truth table that has 4 inputs - ANSWER 16
for a 5V source, what resistance is needed to bias a LED at 50 mA? - ANSWER 60 ohm
for the XNOR gate, the output is high when the inputs are the same - ANSWER false
what are the two approaches to synthesizing a circuit from a truth table? - ANSWER
POS and SOP
There is generally some error in the binary representation of decimal fractional
numbers, ie numbers with digits to the right of the decimal point - ANSWER true
, an op-amp buffer is used for what?
1. current gain?
2. turning a voltage signal into a power signal
3. separating stages
4. preventing loading effects
5. all of these - ANSWER 5. all of these
which of the following is not one of the ways to organize code
a. selection
b. function
c. iteration
d. recursion - ANSWER d. recursion
if you are using the "bool" function, which of the following is likely your return
a. double
b. 5
c. false
d. total - ANSWER false
"analogWrite" in our arduino uno gives us what kind of output? - ANSWER PMW
which of the following lines has the correct syntax for a "for" loop?
a. for(i=0; i < 10; i > 10){
b. for(i=0; i < 10; i--);
c. for(i=0; i < 10; 10);
d. for(i=0; i < 10; i++){ - ANSWER d. for(i=0; i < 10; i++){
what switching technique is used to power LEDs in practice? - ANSWER pulse with
modulation
which of the following stores magnetic field energy? - ANSWER core
the "positive side of a diode is called what? - ANSWER anode
how does a capacitor act when you first charge it up? - ANSWER short
coupling capacitors do what? - ANSWER pass signals
what is the most common use for a electrolytics? - ANSWER power supplies
how many rows are in a truth table that has 4 inputs - ANSWER 16
for a 5V source, what resistance is needed to bias a LED at 50 mA? - ANSWER 60 ohm
for the XNOR gate, the output is high when the inputs are the same - ANSWER false
what are the two approaches to synthesizing a circuit from a truth table? - ANSWER
POS and SOP
There is generally some error in the binary representation of decimal fractional
numbers, ie numbers with digits to the right of the decimal point - ANSWER true
, an op-amp buffer is used for what?
1. current gain?
2. turning a voltage signal into a power signal
3. separating stages
4. preventing loading effects
5. all of these - ANSWER 5. all of these
which of the following is not one of the ways to organize code
a. selection
b. function
c. iteration
d. recursion - ANSWER d. recursion
if you are using the "bool" function, which of the following is likely your return
a. double
b. 5
c. false
d. total - ANSWER false
"analogWrite" in our arduino uno gives us what kind of output? - ANSWER PMW
which of the following lines has the correct syntax for a "for" loop?
a. for(i=0; i < 10; i > 10){
b. for(i=0; i < 10; i--);
c. for(i=0; i < 10; 10);
d. for(i=0; i < 10; i++){ - ANSWER d. for(i=0; i < 10; i++){
