Advertisements
Advertisements
प्रश्न
Of the three connecting wires in a household circuit: Which two of the three wires are at the same potential? In which of the three wires should the switch be connected?
Advertisements
उत्तर
Neutral wire and Earth wire are at same potential and the switch be connected to live wire.
APPEARS IN
संबंधित प्रश्न
Write an expression for the electrical power spent in flow of current through a conductor in terms of
(a) Resistance and potential difference, (b) current and resistance.
A battery of e.m.f 15 V and internal resistance 2 Ω is connected to two resistors of resistance 4 ohm and 6 ohm joined in series. Find the electrical energy spent per minute in 6 ohm resistor.
Water in an electric kettle connected to a 220 V supply took 5 minutes to reach its boiling point. How long would it have taken if the supply voltage had fallen to 200 V?
A bulb with rating 250 V, 100 W is connected to a power supply of 220 V situated 10 m away using a copper wire of area of cross-section 5 mm2. How much power will be consumed by the connecting wires? Resistivity of copper = 1.7 × 10−8 Ωm
Household wiring for lamp connections can either be done in parallel or in series.Which one would you prefer? Give a reason for your answer.
State two advantages of filling an inert gas in an evacuated electric filament lamp.
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
In the given figure, the emf of the cell is 2.2 V, and if internal resistance is 0.6 Ω. Calculate the power dissipated in the whole circuit.
