WBBSE Madhyamik Power (Vocational) study materials
WBBSE Madhyamik Power (Vocational) study resources

WBBSE Madhyamik Power (Vocational) study plan

WBBSE Madhyamik Power (Vocational) · Give each week a clear focus.

8 weeks · About 6 hours per week

Week 1

Electrical Circuits, Wiring and Installation & Fundamentals of Power and Electrical Safety

  • State Ohm's law, series and parallel resistance rules, and compute branch current, voltage drop and total resistance for at least ten mixed circuits by hand

  • Identify the parts of a domestic single-phase installation (service entry, main switch, MCB, distribution board, earthing conductor) and explain the purpose of each in writing

  • Demonstrate safe isolation procedure: prove dead with a tester, lock off, and state the correct sequence for earthing before touching conductors

  • Draw from memory the wiring layout of a one-lamp-one-switch circuit and a two-way stair-light circuit, labelling live, neutral and earth conductors

Your checkpoint

A handwritten workbook of 10 solved circuit problems plus 3 labelled wiring diagrams, self-checked against a printed answer key (target 8/10 correct)

Week 2

Electrical Circuits, Wiring and Installation & Fundamentals of Power and Electrical Safety

  • Calculate cable current-carrying capacity, voltage drop and protective device rating for three given load scenarios and select a suitable conductor size

  • Explain the difference between earthing and neutral, and describe why a fuse or MCB must not be bypassed, using one worked fault example

  • Solve five numerical problems on power, energy and cost of electricity consumption in kWh

  • List the first-aid steps for electric shock and the correct use of a fire extinguisher class on an electrical fire

Your checkpoint

A one-page load schedule for a small two-room installation showing circuit number, load in watts, cable size, breaker rating and calculated voltage drop

Week 3

Electrical Machines and Transformers

  • Describe the construction and working principle of a DC motor and a single-phase induction motor, and state where each is used in a workshop

  • Draw and label the parts of a transformer (core, windings, insulation, cooling) and explain how turns ratio relates to voltage and current

  • Solve six numerical problems on transformer turns ratio, efficiency and losses

  • Compare star and delta connection of a three-phase motor in terms of phase and line voltage and current

  • State the routine checks and likely causes of overheating, vibration and bearing noise in a motor

Your checkpoint

A solved problem set of 6 transformer and motor numericals with a labelled diagram of a transformer and a table of 5 motor faults with their causes

Week 4

Power Generation, Transmission and Distribution

  • Trace the path of electricity from a generating station through transmission and distribution to a domestic consumer and label each voltage stage

  • Explain why high voltage is used for transmission and calculate line losses for two given transmission voltages at the same power

  • Distinguish between a feeder, a distributor and a service main, and between radial and ring distribution systems

  • Describe the function of a substation, a distribution transformer and a circuit breaker in the network

Your checkpoint

A single-page hand-drawn single-line diagram of generation-to-consumer supply with voltage levels, plus a 200-word written explanation of transmission losses

Week 5

Power Electronics and Control

  • Identify the symbols and terminal behaviour of a diode, thyristor, TRIAC, BJT and MOSFET, and state one power application of each

  • Explain half-wave and full-wave rectification and sketch the input and output waveforms for each

  • Describe how a TRIAC dimmer or a PWM-controlled DC drive regulates power to a load

  • Solve four problems on rectifier average output voltage and on a simple transistor switch

Your checkpoint

A waveform sheet showing input and output sketches for half-wave, full-wave and bridge rectifiers with calculated average voltages for a stated AC input

Week 6

Renewable Energy and Energy Conservation & Workshop Practice, Tools and Measurement

  • Compare solar photovoltaic, wind and small hydro sources on availability, cost and suitability for West Bengal conditions, in a written table

  • Calculate the daily energy output of a given solar panel array using panel rating, peak sun hours and a derating factor

  • List five practical energy-conservation measures in a home or workshop and estimate the monthly saving in units for each

  • Demonstrate correct use of a multimeter to measure voltage, current and resistance, and of a clamp meter and megger, and state the safety precaution for each

  • Identify the common hand tools and their correct use in electrical workshop practice, including wire stripper, crimping tool and soldering iron

Your checkpoint

A practical record sheet of 5 multimeter, clamp meter and megger readings taken on a real circuit, with the expected value and the measured value side by side, plus a 10-row energy-saving table with savings estimates

Week 7

Project Work, Entrepreneurship and Employability Skills & Fundamentals of Power and Electrical Safety

  • Draft a simple project proposal for a small electrical or solar installation, stating objective, components, estimated cost and safety plan

  • Prepare a short employability profile listing the electrical skills acquired, a sample job application letter and answers to three common interview questions

  • Explain the basic requirements for a small electrical service enterprise, including licensing, insurance and record keeping

  • Revise safety rules and first aid from week 1 and answer 20 mixed safety questions without notes

Your checkpoint

A 2-page project proposal with a component and cost list, plus a one-page CV and covering letter for an electrical technician post

Week 8

Fundamentals of Power and Electrical Safety & Electrical Circuits, Wiring and Installation & Power Generation, Transmission and Distribution & Electrical Machines and Transformers & Power Electronics and Control & Renewable Energy and Energy Conservation & Workshop Practice, Tools and Measurement & Project Work, Entrepreneurship and Employability Skills

  • Attempt two full-length mock papers under timed conditions and score each against the marking scheme

  • Re-solve every question missed in the mocks and write the correct reasoning in one line each

  • Recite from memory the key formulas for circuits, transformers, rectifiers and energy cost, and check them against the formula sheet

  • Review the week 1-7 deliverables and close any gap flagged in the self-check lists

Your checkpoint

Two completed timed mock papers with scores recorded and a one-page error log of every mistake with its corrected reasoning

Milestones

Week 2: Can solve a mixed series-parallel circuit and select a breaker and cable size for a stated load without referring to notes, scoring at least 8/10 on a self-made quiz

Week 4: Can draw the generation-to-consumer single-line diagram from memory with correct voltage stages and explain transmission losses numerically

Week 6: Can take voltage, current and insulation resistance readings correctly with a multimeter, clamp meter and megger, and justify each energy-saving measure with a calculated saving

Week 8: Scores at least 60 percent on both timed mock papers and has a written error log with no repeated mistake category