Electronic Science - Online Test
Q1. In the CMOS inverter circuit shown, if the trans conductance parameters of the
NMOS and PMOS transistors are
and their threshold voltages ae 
the current I is
and their threshold voltages ae the current I is
Answer : Option D
Explaination / Solution:
Q2. If a positive charge moves in the direction of the electric field
Answer : Option B
Explaination / Solution:
A positive charge experiences a force in the direction of the field. If it moves in the direction of the field, positive work is done by the electric field on the charge. Potential energy of the charge increases only when an external source does work on the charge against the direction of the field- eg: when the charge is moved against the direction of the field
Q3. 
A three – bus network is shown in the figure below indicating the p.u. impedances of each element.
The bus admittance matrix, Y – bus, of the network is
Answer : Option B
Explaination / Solution:
Q4. correct unit of magnetic field is
Answer : Option D
Explaination / Solution:
The SI unit of magnetic field is Tesla (T)
Q5. Which one of the following circuits is NOT equivalent to a 2-input XNOR
(exclusive NOR) gate?
Answer : Option D
Explaination / Solution:
All options except option ‘D’ gives EX-NOR gates
Q6. For the circuit shown in the figure, the voltage and current expressions are 
The average power measured by the Wattmeter is
Answer : Option C
Explaination / Solution:
Q7. The typical ratio of latching current to holding current in a 20 A thyristor is
Answer : Option B
Explaination / Solution:
No Explaination.
Q8. Consider the given circuit.
In this circuit, the race around
Answer : Option A
Explaination / Solution:
Q9. It is observed in a potentiometer experiment that no current passes through the galvanometer, when the terminals of the cell are connected across a certain length of the potentiometer wire. On shunting the cell by a 2 Ω resistance, the balancing length is reduced to half. The internal resistance of the cell is
Answer : Option B
Explaination / Solution:
The internal resistance of the cell is given by:
Q10. Far axial magnetic field of a solenoid as well as bar magnet vary
Answer : Option A
Explaination / Solution:
No Explaination.
