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प्रश्न
An electric bulb is marked '100 W, 250 V'. What information does this convey?
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उत्तर
It means that if the bulb is lighted on a 250 V supply, it consumes 100 W electrical power (which means 100J of electrical energy is converted in the filament of bulb into the light and heat energy in 1 second).
संबंधित प्रश्न
Which particles constitute the electric current in a metallic conductor?
In which direction does conventional current flow around a circuit?
If 20 C of charge pass a point in a circuit in 1 s, what current is flowing?
Which unit could be used to measure current?
(a) Watt
(b) Coulomb
(c) Volt
(d) Ampere
Tell the odd one out. Give a proper explanation.
Tick(✓) the correct choice in the following:
Which of the following quantities has the same value for all electrical
appliances connected to the ring main circuit in a house?
60 joules of heat was dissipated in a resistor when 20 C flowed for 5 s. Calculate:
(a) P.d. across the resistor,
(b) Resistance of the resistor, and
(c) Average power dissipated in the resistor.
State the S.I. units of electrical power.
Which part of an electrical appliance is earthed?
