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).
Which of the following pairs correctly defines the term in definition?
What type of electrical signal is shown in the given figure?
A 12-pole alternator running at a speed of 600 rpm will produce a frequency of
The no-load primary input current lags the primary voltage by an angle
Which of the given options best describes the truthfulness of the following statements with reference to the properties of the magnetic circuits?
P: Permeance is the opposition offered to the magnetic flux by the magnetic path.
Q: Magnetic lines of force cannot pass through air.
For a series RLC circuit, at resonance the
Find the voltage $v_1$ in the following circuit.
In an indirect arc furnace, the heat is transmitted from the arc to the top layer of the charge by ________ and it operates at a power factor of ________.
Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): Open tenders are invited by public advertisement.
Reason (R): Any contractor who is willing to undertake the work and who has the requisite finance and equipment to complete the work satisfactorily is allowed to submit the offer.
A single-stack, eight-phase, multipole stepper motor has six rotor teeth. The phases are excited one at a time. Determine the number of steps per revolution.
Choose the correct pair of bridge with its application:
If an electrical device consumes 50 watts of power for 10 minutes, what is the total electrical energy consumed by the device?
Match the different types of lamps with their relative luminous efficiencies.
| Type of Lamp | Luminous Efficiency |
|---|---|
| (i) Sodium vapour lamp | (a) medium |
| (ii) Fluorescent lamp | (b) very high |
| (iii) Tungsten filament lamp | (c) low |
| (iv) Carbon filament lamp | (d) high |
The ________ turbine is a reaction turbine in which the runner receives water axially.
Which of the following is NOT a valid advantage of capacitor-start capacitor-run motor?
When applying Thevenin's Theorem to a circuit, if the Thevenin voltage is 40 V and the Thevenin equivalent resistance is $5\ \Omega$, what is the current through a load resistor of $15\ \Omega$ connected across the terminals?
A 15-V source is applied to a capacitive circuit that has an impedance of $(6 - j8)\ \Omega$. Find the angle by which the current leads the voltage.
Which of the following pair of typical diodes and their corresponding threshold voltages is INCORRECT?
Which of the following is called the mechanical characteristic of a DC motor?
Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).
Assertion (A): In a synchronous generator phasor diagram, the armature current ($I_a$) is in phase with the excitation voltage ($E$), and the excitation voltage leads the terminal voltage ($V$).
Reason (R): When a synchronous generator operates in generating mode, the armature current is in phase with the excitation voltage, and the excitation voltage leads the terminal voltage.
In a resistance start motor, the pull-out torque is about 2.5 times the full load torque at about ________ of synchronous speed.
In a network with multiple resistors, if the delta-star transformation is applied, what is the equivalent delta resistance for a star-connected set of resistors $R_1 = 6\ \Omega$, $R_2 = 10\ \Omega$ and $R_3 = 15\ \Omega$?
Find the equivalent capacitance $C_{\text{eq}}$ in the following circuit.
Calculate the power dissipated in the Zener diode in following circuit.
In an AC current carrying conductor, the skin effect ________ with the increase in diameter of the conductor and ________ with the increase in frequency.