Advertisements
Advertisements
प्रश्न
Which one has a higher electrical resistance : a 100 watt bulb or a 60 watt bulb?
Advertisements
उत्तर
A 60-watt bulb has a higher electrical resistance than a 100-watt bulb. Because power is inversely proportional to resistance, when the power is less, the resistance is high.
APPEARS IN
संबंधित प्रश्न
Which particles are responsible for current in conductors?
Define watt. Write down an equation linking watts, volts and amperes.
An electric fan runs from the 230 V mains. The current flowing through it is 0.4 A. At what rate is electrical energy transferred by the fan?
When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is:
(a) 0.5 W
(b) 6 W
(c) 12 W
(d) 24 W
Distinguish between kilowatt and kilowatt-hour.
Define 1 kilowatt hour.
A potential difference of 6 V is applied across a 3 Ω resistor. What is the current flowinq throuqh the circuit?
Why is the electric power from the generating station transmitted at high voltage?
State the reason why, in a three pin plug, the earth pin is longer and thicker than the other two.
State other bigger units of electric power and express them in watt.
Establish the relation that heat produced in a metallic conductor due to the flow of current is V2t/R joules, where V is the potential difference across the ends of the conductor, R its resistance and t is the time in second for which current flows.
Find the energy released by a current of 0.25 amperes flowing through a heater for 5 minutes. The p.d. is 230 V.
An Electric bulb is marked 100 W, 230 V. What current does it take?
A. bulb is rated at 100W, 250V and another one at 60W, 250V. What is the current flowing in the circuit if the two bulbs are put in series across a 220 V mains supply?
The electrical power and current in the circuit relates by ______
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.
A conductor of 10 Ω is connected across a 6 V ideal source. The power supplied by the source to the conductor is ______.
Two heaters A and B have power rating of 1 kW and 2 kW, respectively. Those two are first connected in series and then in parallel to a fixed power source. The ratio of power outputs for these two cases is ______
