NEW
Font size
WorksheetsHACKATHON PRELIMS HARDWARE BATCH-3
Total questions: 25
Worksheet time: 16mins
Which of the following are not a semiconductor?
Antimony
Tin
Germanium
Mica
Which diode operates in reverse bias?
photodiode
zener Diode
Schottky Diode
P-N Junction Diode
"The sum of all Voltages around a closed loop in any circuit must be equal to zero belongs" to which law?
Ohm's Law
Kirchoff's Current Law
Kirchoff's Voltage Law
Faraday's Law
The point where more than two network elements meet
Node
Mesh
Loop
Branch
Who invented the first DC generator?
Michael Faraday
Charles F.Brush
Isaac Newton
Robert Boyle
Which gives safe transferring of voltages in transformer?
DC
AC
Both AC and DC
None of the listed
why capacitors work on ac only
capacitor gives infinte resistance to DC
The reactance of the capacitance is inversely proportional to frequency
Because, in DC frequency is zero
All of the listed
Unit of Magnetic Flux
Henry
Tesla
Weber
Farad
Unit of Resistance
Ohm
Ohm/meter
mho
(meterohm)−1
Consisder Diode to be ideal and Voltage across it is 0.7V and Voltage across LED is 1.3V . Find the current (I) in the circuit?
13.6 milliAmps
1.36 milliAmps
1Amps
None
Pick the Correct following Statement.
LED will glow at instant
Due to Reverse bias of P-N junction Diode, LED will not glow
Current across LED is HIGH
Current across Diode is HIGH
Calculate total Resistance. when 3 number of 3ohm resistors connected in parallel?
9 Ohm
3 Ohm
1 Ohm
6 Ohm
The true Power in a Capacitor is zero
True
False
Light Year is unit of
Time
Distance
Intensity of a Light
Gravity
Pascal is unit of
Tempreture
Distance
Pressure
Intensity
Metals contain good conductors of electricity because
They contain free electrons
The atoms are lightly packed
They have melting Point
All the above
Sound of Frequency below 20Hz are called
Ultrasonic
Audio Sounds
Infrasonic
Supersonic
Sir C.V.Raman was awarded Nobel prize for his work in
Radiation
Diffraction
Polarization
Scattering
The current Supplied by the Source is 5A, What will be the source Voltage
20Volts
25Volts
40Volts
50Volts
What is the equivalent resistance of the given Circuit ?
if R1=3.5 ohm and R2 = 2.4 ohm
0.56 ohm
0.7023 ohm
1.345 Ohm
1.456 Ohm
Find the value of resistance (Rab) in the following circuit
15 Ohm
5.6 Ohm
21 Ohm
11.2 Ohm
What is unit of Inductance ?
Weber
Hertz
Hentry
Farad
Pick the correct statement.
Capacitors which Oppose sudden change in voltage
Capacitors which oppose sudden change in current
Inductor which oppose the sudden change in voltage
None of the above
Which one of the following is the machine language?
Binary Digits
C
Java
Python
In which mode transistor can act as a switch
cut off Region
Saturation Region
Both cutoff and Saturation Region
Active Region
