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100+ Free RBSE SS Voc Electrical and Elect Practice Questions

Rajasthan RBSE Senior Secondary (Class 12) Vocational Electrical and Electronics — Code 109 practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: RBSE SS Voc Electrical and Elect Exam

109

RBSE subject code for Electrical and Electronics

RBSE 2026 subject-wise statistics

100

Typical full marks for the subject scheme

RBSE syllabus examination scheme

3.15 hrs

Typical theory paper duration

RBSE Class 12 / Varishtha Upadhyaya syllabus scheme

33%

Typical minimum pass marks (confirm circular)

RBSE examination regulations

100

Free English MCQ study questions on this page

OpenExamPrep practice bank

RBSE Senior Secondary (Class 12) Vocational Electrical and Electronics (code 109) is a real Board of Secondary Education, Rajasthan public-examination subject with appeared candidates in the 2026 main examination subject-wise statistics. Typical scheme: Theory 80 + Sessional 20 = 100; passing generally 33% (and separate practical pass where applicable). Use these free MCQs for theory revision only.

Sample RBSE SS Voc Electrical and Elect Practice Questions

Try these sample questions to test your RBSE SS Voc Electrical and Elect exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Ohm's law for a constant-temperature ohmic resistor states that voltage V equals:
A.Current multiplied by resistance (V = I × R)
B.Current divided by resistance (V = I / R)
C.Resistance divided by current (V = R / I)
D.Current plus resistance (V = I + R)
Explanation: Ohm's law is V = I × R. Rearrangements are I = V / R and R = V / I. Adding current and resistance is not a valid relationship.
2A 24 V DC supply is connected across a 12 Ω resistor. The current is:
A.0.5 A
B.2 A
C.12 A
D.288 A
Explanation: I = V / R = 24 V / 12 Ω = 2 A.
3The SI unit of electric current is the:
A.Volt
B.Ohm
C.Ampere
D.Watt
Explanation: Current is measured in amperes (A). Volt is potential difference, ohm is resistance, and watt is power.
4Electric power P in a DC circuit is commonly calculated as:
A.P = V / I
B.P = V + I
C.P = V − I
D.P = V × I
Explanation: Power is the product of voltage and current: P = V I. It can also be written as I²R or V²/R.
5Which material is typically used as a good electrical conductor for house wiring?
A.Copper
B.Glass
C.Rubber
D.Dry wood
Explanation: Copper has low resistivity and is widely used for conductors. Glass, rubber, and dry wood are insulators.
6In a series circuit of three identical resistors, the total resistance is:
A.Equal to one resistor only
B.Three times one resistor
C.One-third of one resistor
D.Always zero
Explanation: Series resistances add: Rtotal = R1 + R2 + R3. For three equal resistors R, Rtotal = 3R.
7A fuse is primarily intended to:
A.Increase voltage to the load permanently
B.Store energy like a capacitor
C.Protect the circuit by melting when current is excessive
D.Replace the need for any insulation
Explanation: A fuse is a sacrificial overcurrent device: its element melts and opens the circuit when current exceeds its rating for long enough.
8The purpose of earthing (grounding) a metal equipment body is mainly to:
A.Increase the normal operating voltage of the appliance
B.Eliminate the need for any fuse or MCB
C.Convert AC permanently to DC
D.Provide a low-resistance path for fault current so protective devices can clear the fault safely
Explanation: Protective earthing connects exposed metal to earth so a live-to-body fault creates a large fault current that trips the fuse/MCB/ELCB rather than leaving the body at dangerous potential.
9A multimeter set to measure resistance should be connected:
A.Across the component with power removed and the component isolated as needed
B.In series with a live high-voltage feeder only
C.Only while the circuit is energized at full load
D.Between phase and earth on a live panel without care
Explanation: Resistance measurements require a de-energized circuit; the meter injects a small test current. Measuring ohms on a live circuit can damage the meter and give false readings.
10Voltage is measured by connecting a voltmeter:
A.Only in series with the load always
B.In parallel with the points whose potential difference is required
C.Only after shorting the supply terminals
D.With the circuit permanently open at every node
Explanation: A voltmeter has high internal resistance and is connected in parallel across the two points of interest.

About the RBSE SS Voc Electrical and Elect Practice Questions

Verified exam format metadata for Rajasthan RBSE Senior Secondary (Class 12) Vocational Electrical and Electronics — Code 109 is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.