WorksheetsT.A Điện - Practice 2 (Unit 9 - Inductors)
Total questions: 25
Worksheet time: 19mins
The reduction of current flow in a circuit due to induction is called (a)
Why is the core of a transformer is laminated?
to reduce eddy current
to reduce hysteresis effect
to cool it down
to increase the eddy current
The main purpose of inductors is to (a)
What does the term "eddy current" mean in Vietnamese?
dòng xoáy
xoáy dòng
dòng điện cảm ứng
dòng trễ
What does the term "copper loss" in operation of a transformer mean in Vietnamese?
mất mát đồng
mất mát trong cuộn dây
tổn thất đồng
đồng gây tổn thất
What does the term "choke" mean in Vietnamese?
bộ phận làm nghẹt
cuộn cảm kháng
thiết bị chặn
thiết bị cảm ứng
Voltage can be induced in a coil by
moving the coil near a magnet
moving a magnet near the coil
changing the current in a nearby coil
all of these
The main components of a transformer are (a)
A passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through i
resistor
capacitor
inductor
switch
The unit of inductance is (a)
Which of the following is the tendency to oppose the change in circuit current?
Capacitance
Inductance
Resistance
All of the above
(a) is defined as the induction of a voltage in a current-carrying wire when the current in the wire itself is changing
The production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field is called (a)
The core of an inductor is typically made of (a)
If the frequency of the current passing through an inductor increases, it inductive reactance (a)
The unit of inductive reactance is (a)
The winding of a transformer that is connected to a source of energy is called the:
load winding
primary winding
secondary winding
source winding
In a transformer, energy is transferred from the primary winding to the secondary winding by a:
connecting wire
connection
linkage
magnetic field
(a) is defined as the property of a coil to produce a voltage that opposes the changes in the current in another coil placed near it.
Transformer operation is an example of:
self-induction
common induction
mutual induction
linkage.
The voltage induced in the secondary coil of a transformer is (a) its number of turns.
What does the term "inductive reactance" mean in Vietnamese?
cảm trở
cảm kháng
điện trở cảm
phản ứng cảm
An inductor typically consists of (a)
What is the function of a small ferrite ring choke on the power cord of many electronic devices?
suppress high-frequency noise in electronic circuits
increase high frequency noise in electronic circuit
stop the high-frequency signal
reduce the signal level
What is the function of a choke connected in series with the woofer in a stereo system?
to allow high-frequency signal to pass
to block high-frequency signal
to increase low-frequency signal
to increase high-frequency signal
