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100+ Free Maharashtra SSC Electronics Technology Pre-Voc/NSQF Practice Questions
Maharashtra Secondary School Certificate (SSC / Class 10) Electronics Technology — MSBSHSE pre-vocational / NSQF skill subject (commonly code 93; confirm hall ticket) practice questions are available now; exam metadata is being verified.
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Sample Maharashtra SSC Electronics Technology Pre-Voc/NSQF Practice Questions
Try these sample questions to test your Maharashtra SSC Electronics Technology Pre-Voc/NSQF exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A semiconductor material has electrical conductivity that is typically:
A.Between that of a good conductor and a good insulator
B.Higher than pure copper in all conditions
C.Exactly zero at all temperatures
D.Identical to air at room temperature
Explanation: Semiconductors such as silicon and germanium conduct better than insulators but far less than metals under normal conditions. Their conductivity rises strongly with temperature and doping, which is why they sit between conductors and insulators in the resistivity hierarchy.
2Silicon atoms in a pure crystal form bonds mainly using how many valence electrons?
A.Four
B.One
C.Eight free metallic electrons per atom
D.Zero valence electrons
Explanation: Silicon is in Group 14 and has four valence electrons. In the crystal lattice each atom shares these with four neighbours to form covalent bonds, leaving almost no free carriers in pure silicon at very low temperature.
3Doping pure silicon with a Group 15 element such as phosphorus produces mainly:
A.An n-type semiconductor with electrons as majority carriers
B.A perfect insulator at room temperature
C.A p-type semiconductor with holes as majority carriers
D.A superconductor below 0 °C only
Explanation: Group 15 donors have five valence electrons. Four bond into the lattice and the fifth becomes a free electron near the conduction band, so electrons are majority carriers in n-type material.
4A p-type semiconductor is formed by adding which kind of impurity to silicon?
A.A Group 13 acceptor such as boron
B.A Group 15 donor such as phosphorus
C.Pure gold foil only
D.Distilled water
Explanation: Group 13 atoms have three valence electrons. When they replace silicon, a hole is created in the bonding structure. Holes act as majority carriers in p-type material.
5In a silicon PN junction diode under forward bias, the external source is connected so that:
A.The P-side is more positive than the N-side
B.The N-side is more positive than the P-side
C.Both sides are left floating with no voltage
D.Only AC is applied with zero average voltage forever
Explanation: Forward bias applies positive voltage to the P-region and negative to the N-region. This reduces the barrier potential so majority carriers can cross the junction and produce large forward current after the knee voltage.
6The approximate knee (cut-in) voltage of a silicon diode at room temperature is about:
A.0.7 V
B.0.05 V
C.12 V
D.100 V
Explanation: Silicon PN diodes typically begin significant forward conduction near 0.6–0.7 V at room temperature. Germanium is lower (~0.3 V), while power or LED devices can differ.
7Under reverse bias (below breakdown), an ideal silicon diode ideally:
A.Conducts only a very small reverse leakage current
B.Acts as a perfect short circuit
C.Produces continuous large AC power by itself
D.Becomes a permanent magnet
Explanation: Reverse bias widens the depletion region. Only minority-carrier leakage flows until the reverse voltage reaches breakdown. Ideal textbook models often treat reverse current as nearly zero.
8A light-emitting diode (LED) emits light primarily when it is:
A.Forward biased with sufficient current
B.Always reverse biased beyond breakdown
C.Left with both leads open in darkness only
D.Shorted with a thick copper bar
Explanation: In a forward-biased LED, injected carriers recombine and release energy as photons. Colour depends on semiconductor band gap. Reverse bias is not used for normal light emission.
9A Zener diode is mainly used in power circuits to:
A.Provide a reference or regulated voltage in reverse breakdown
B.Replace transformers as a primary step-up device
C.Generate radio waves without a power source
D.Store large amounts of electrostatic energy like a supercapacitor
Explanation: Zener diodes are designed to operate safely in reverse breakdown at a specified voltage. With a series resistor they form simple shunt regulators and reference sources.
10In a bipolar junction transistor (BJT), the three terminals are called:
A.Emitter, base, and collector
B.Anode, cathode, and gate only
C.Source, drain, and body only
D.Primary, secondary, and core
Explanation: A BJT has emitter, base, and collector regions. Small base current controls larger collector–emitter current in the active region, enabling amplification and switching.
About the Maharashtra SSC Electronics Technology Pre-Voc/NSQF Practice Questions
Verified exam format metadata for Maharashtra Secondary School Certificate (SSC / Class 10) Electronics Technology — MSBSHSE pre-vocational / NSQF skill subject (commonly code 93; confirm hall ticket) is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.