Advertisements
Advertisements
प्रश्न
An electric bulb is rated as 100W – 250V. What information does it convey? Calculate the current through the filament of the bulb.
Advertisements
उत्तर
Given: P = 100 W, V = 250 volt
The current through the filament, I = `"P"/"V" = 100/250 = 0.4` A.
APPEARS IN
संबंधित प्रश्न
Which uses more energy: a 250 W TV set in 1 hour or a 1200 W toaster in 10 minutes?
What is the resistance, under normal working conditions of a 240 V electric lamp rated at 60 W? If two such lamps are connected in series across a 240 V mains supply, explain why each one appears less bright.
Two resistors A and B of resistance 4 Ω and 6 Ω respectively are connected in parallel. The combination is connected across a 6 volt battery of negligible resistance. Calculate: (i) the power supplied by the battery, (ii) the power dissipated in each resistor.
An electric bulb marked 220 V, 100 W will get fused if it is made to consume 150 W or more. What voltage fluctuation will the bulb withstand?
What is wrong with the circuit diagram (Fig. 34)? Carefully check the symbols and assign proper positive and negative signs to them.
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
Point out two main disadvantages of ‘Tree System’.
An electric heater is rated 220 V, 550 W. Calculate the electrical energy consumed in 3 hours?
A consumer uses 4 lamps of 60 watt, 2 lamps of 40 watt, and 2 lamps of 100 watt. All these are used for 6 hour daily. Find the total bill for 30 days when the rate of energy is 75 paise per unit and the meter rent is Rs. 1.
