MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Computer Science
Electronic Principles
Quiz 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
The value of a capacitor can be made larger by:
increasing the area of the plates
decreasing the area of the plates
increasing the frequency of the applied voltage
increasing the voltage applied to the plates
None of the above
Q.2
The value of a capacitor can be made larger by:
moving the plates further apart
moving the plates closer together
increasing the voltage applied to the plates
decreasing the voltage applied to the plates
None of the above
Q.3
The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?
0.25
180
0.5
4
None of the above
Q.4
Suppose a voltage source has an ideal voltage of 12V and an internal resistance of 0.5W. For what values of load resistance will the voltage source appear stiff?
5 Ohm
50 Ohm or more
100 Ohm
6 Ohm
None of the above
Q.5
Electron current is flowing through a conductor in a direction you might describe as straight into this page. What is the direction of the resulting magnetic field?
Clockwise
Counterclockwise
Out of this page
Into this page
None of the above
Q.6
The direction of electron current flow is:
from right to left
from positive to negative
from negative to positive
from neutral to positive
None of the above
Q.7
A device that converts mechanical pressure to electrical energy is called a:
piezoelectric device
solar cell
photodiode
nicad cell
None of the above
Q.8
What is a negative ion?
An atom that contains more electrons than neutrons
An atom that contains more protons than neutrons
An atom that contains more electrons than protons
An atom that contains more protons than electrons
None of the above
Q.9
Which one of the following statements is true for the voltage in a parallel RC circuit?
The voltage always has the same amplitude and phase for every part of the circuit
The total voltage is equal to the sum of the voltages across the resistance and capacitance
The total voltage leads the total current by less than 90 degree
The total voltage is less than the sum of the voltages across the resistance and capacitance
None of the above
Q.10
In a transistor operates at the middle of the load line, an increase in the base resistance will move the Q point
down
up
nowhere
off the load line
None of the above
Q.11
Which one of the following statements most accurately applies to the frequency of a waveform?
The actual frequency of a sine waveform is 1.41 times the working frequency
Unless specified otherwise, the frequency of a waveform is assumed to be 60 Hz
The higher the amplitude of a waveform, the higher its frequency
The longer the period of a waveform, the lower its frequency
None of the above
Q.12
The Thevenin resistance is equal in value to the
Load resistance
Half the load resistance
Internal resistance of a Morton circuit
Open-load resistance
None of the above
Q.13
Most AC power is obtained from:
generators
batteries
oscillators
lightning
None of the above
Q.14
Voltage is
The flow of charged particles through a material
The smallest electrically charged particle
Trie force that causes electrons to flow
The number of free electrons in an atom
None of the above
Q.15
What is the turns ratio for the transformer specified in the above question?
10.738
0.707
1.5
0.575
None of the above
Q.16
The merging of a free electron and a hole is called
Covalent bonding
Lifetime
Recombination
Thermal energy
None of the above
Q.17
One henry of inductance is defined as:
the amount of counter emf required to reduce a current to 1 A
the amount of inductance required for generating 1 V of counter emf when the current changes at the rate of 1 A per second
the amount of inductance required to change the frequency of a current by 1 Hz
the number of turns of wire in an inductor multiplied by the amount of current flowing through it
None of the above
Q.18
A certain power transformer has a turns ratio of 5. What voltage can you expect at the secondary winding when you apply 120 V to the primary winding?
4.73
0.4 V
24 V
600 V
None of the above
Q.19
The total impedance of a series RLC circuit:
is minimum at the resonant frequency
always increases as the applied frequency increases
always decreases as the applied frequency increases
is maximum at the resonant frequency
None of the above
Q.20
What is the phase shift between total current and voltage in the circuit of a 100 ohm resistor connected in parallel with a capacitor that has a reactance of 100 ohm
180 degree
30 degree
45 degree
75 degree
None of the above
Q.21
Molecule is
The smallest particle of a substance that retains the properties of that substance
A atom that has a shortage of electrons in its outer orbit
A atom that has an excessive number of electrons in its outer orbit
A atom that flows whenever there is an imbalance of electrical charges between two points
None of the above
Q.22
Which one of the following statements is true for current flowing in a parallel circuit?
The amount of current flow through each branch of a parallel circuit can be different, depending on the resistance of each branch part and the amount of voltage applied to it
The same current always flows through every part of a parallel circuit
The total current in a parallel circuit is equal to the total voltage multiplied by the total resistance
The total current in a parallel circuit is always less than the smallest amount of current
None of the above
Q.23
Holes are the minority carriers in which type of semiconductor?
Extrinsic
Intrinsic
n-type
p-type
None of the above
Q.24
A dielectric material is:
a good conductor
a good insulator
a poor conductor of electrostatic fields
a good conductor of magnetic fields
None of the above
Q.25
A certain electromagnet has 1000 turns of wire. How much current must flow through the coil in order to generate an mmf of 100 ampere-turns?
0.1 A
1000 A
10:00 AM
100 A
None of the above
Q.26
The basic unit of measurement for current is the:
volt
watt
ampere
ohm
None of the above
Q.27
Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?
The voltage remains at one polarity and at a steady level
The voltage remains at one polarity but changes value periodically
The voltage causes current to flow in two directions at the same time
The voltage reverses polarity periodically
None of the above
Q.28
Which one of the following statements is true for the currents in a parallel RC circuit?
The total current is equal to the sum of the currents for the resistance and capacitance
The current always has the same amplitude and phase for every part of the circuit
The total current is less than the sum of the currents for the resistance and capacitance
The total current. is greater than the sum of the currents for the resistance and capacitance
None of the above
Q.29
Which one of the following statements is true for current flowing in a series circuit?
The amount of current flow through each part of a series circuit can be different, depending on the resistance of each part and the amount of voltage applied to it
The total current in a series circuit is equal to the sum of the currents flowing through the individual components in the circuit
The same current flows through every part of a series circuit
The total current in a series circuit is equal to the total voltage multiplied by the total resistance
None of the above
Q.30
What form of energy is used for creating static electricity?
Solar energy
Mechanical energy
Chemical energy
Light energy
None of the above
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page