WBBSEClass XPhysical ScienceCurrent Electricity03 Mark2022 Easy

QQuestion

Which energy is transformed to which energy in an electric motor? Why in domestic circuits, electric bulbs, electric fans, refrigerators etc., are connected in parallel combination ? [1 + 2]

Exam-ready answer 03 Mark

Answer

In an electric motor, electrical energy is transformed into mechanical energy.

Domestic Circuits Use Parallel Combination because

  1. Each appliance gets the same voltage, ensuring it works properly.
  2. If one appliance fails, others still work. This prevents disruptions.
  3. Each appliance has its own switch allowing for easy operation of each appliance.
Was this answer helpful?

Related Questions

More WBBSE Easy level questions

1/12

State Ohm's law. If a potential difference of 10 V is applied between the two ends of a conductor, an electric current of 0.1 A flows. Determine the resistance of the conductor. [2 + 1]

Easy 03 Mark

If two conductor wires of resistances 6 ohms and 4 ohms are connected in parallel combination, what will be the equivalent resistance of the combination?

Easy 02 Mark

Give the definition of electromotive force of an electric cell in open circuit.

Easy 02 Mark

Match the Right column with the Left column : [1 × 4 = 4] Left Column Right Column 2.11.1 Acetic acid (a) non-conductor of electricity 2.11.2 Glass (b) Weak electrolyte 2.11.3 Most electro-negative element (c) Krypton 2.11.4 One Noble Element (d) Fluorine

Easy 01 Mark

'Kilowatt-hour' is the unit of which physical quantity?

Easy 01 Mark

What is the unit of electrical conductance? [1] OR What are the constituents of fuse wire? [1]

Easy 01 Mark

What is the SI unit of electric charge?

Easy 01 Mark

If the resistance (R) of the conductor and time of flow of current in the conductor (t) remain unchanged, the relation between the heat produced (H) the conductor and flow of current (l) is (a) H ∝ I (b) H ∝ (c) H ∝ I2 (d) H ∝

Easy 01 Mark

The charge of an electron is (a) -3.2 × 10-19C (b) -1.6 × 10-19C (c) 6 × 10-19 C (d) 3.2 × 10-19 C

Easy 01 Mark

Write down the difference between dynamo and electric motor. What is earthing?

Easy 03 Mark

If two electric bulbs of ratings ‘240V-60 W’ and ‘240V-100W’ are connected in series, which one will shine brighter? (Filaments of both the bulbs are of the same material).[3] OR An electric cell of internal resistance 5 Ω and emf 2 V is connected to a resistor of 15 Ω. Determine the potential difference between the two ends of the cell. [3]

Hard 03 Mark

Mention any two advantages of using alternating current over direct current. Why is hydroelectric power generation more environmentally friendly than thermal power generation? [1+2]

Easy 03 Mark