Prepare for SSC JE Electrical with official previous years' solved questions across Basic Concepts & Circuit Law, Magnetic Circuits, AC Fundamentals, Measurement & Measuring Instruments, Electrical Machines, Generation, Transmission & Distribution, Estimation & Costing, and Basic Electronics.
Marking pattern: +1.00 positive, -0.25 negative for Paper-I (Official SSC JE Scheme).
Determine the total charge transferred over the time interval of $0 \le t \le 10\text{ s}$, when the current is given as $i(t) = 0.5t\text{ A}$.
What is the mathematical representation of solid angle ($\omega$) in terms of area ($A$) and radius ($r$)?
What will be the main consideration in quotation of any electrical installation?
In a transformer, the core loss is found to be 52 W at 40 Hz and 90 W at 60 Hz, measured at same peak flux density. Compute the eddy current loss at 50 Hz.
Which of the following is a passive electronic component?
Explore the components and systems related to the thermal power plant. Assess the following statements and determine their correctness.
Statements:
I. Water economizers in boiler installations increase efficiency by utilizing the heat of exhaust gases.
II. The electrical thermal plant involves supplying medium voltage, low voltage, and direct current power to all loads in the power plant, covering aspects from power evacuation to switchyard control.
Two long parallel conductors, each one carrying current 100 A, flowing in the same direction, are separated by 1 cm in air. Find the force per metre length of the conductor.
What is the significance of Rule 29 in the Indian Electricity Rules, 2005, regarding electrical installations?
In a cathode-ray tube, the focusing anode is positioned between the
Which of the given options best describes the truthfulness of the following statements with reference to mechanical draught and natural draught in a thermal power plant?
P: Mechanical draught is independent of atmospheric temperature.
Q: In case of natural draught, the chimney height is more.
Match the following terms with their correct formula in the context of work ($W$), power ($P$), and energy ($E$):
| Terms: | Definitions / Formulas: |
|---|---|
| 1. Electrical Energy Formula | a) $V \cdot I\text{ watts}$ |
| 2. Electrical Power formula | b) $I^2 R \cdot t$ |
| 3. Basic Units of Electrical Energy | c) Joule |
| 4. Basic units of Electrical Power | d) Joule/Sec |
What component, integral to electrostatics, is designed to accumulate and discharge electrical energy by utilizing the electric field between two conductive plates?
A potential barrier of 0.7 V exists across a PN-junction. Calculate the intensity of the electric field in the depletion region, if the width of the depletion region is $(3.5 \times 10^{-7})\text{ m}$.
Under what conditions does an alternator exhibit a zero-voltage regulation?
Which of the following statements is INCORRECT?
In a complex electrical network, applying Norton's Theorem involves finding the Norton current and Norton equivalent resistance. What is the Norton equivalent resistance for a network with resistances $R_1 = 8\ \Omega$ and $R_2 = 12\ \Omega$ in parallel?
Find the voltage $v_1$ in the following circuit.
Which of the following statements about the torque vs. armature current ($T_a - I_a$) characteristic of DC series motors is correct?
What is the primary difference between Avalanche breakdown and Zener breakdown in a p-n junction diode?
Match the transistor configuration with the corresponding output resistance of the configuration.
| Configuration | Output Resistance |
|---|---|
| (i) Common emitter | (a) Low |
| (ii) Common collector | (b) Very high |
| (iii) Common base | (c) High |
Which of the following statements is INCORRECT for the superposition theorem?
The impedance of a series RL circuit is $130\ \Omega$. If the inductive reactance ($X_L$) in the circuit is $50\ \Omega$, find the value of the resistance.
In a 3-wire DC system, in order to maintain voltages on the two sides of the neutral equal to each other, a/an ________ is used.
Which of the following is NOT a diamagnetic material?
What is the term used to describe the combination of a transmission line's resistance, inductance, and capacitance, influencing the voltage drop along the line and its ability to transfer power efficiently?