Advertisements
Advertisements
प्रश्न
Which material is the calorimeter commonly made of? Give one reason for using this material.
Advertisements
उत्तर
Copper. It is good conductor of heat.
संबंधित प्रश्न
Name two safety devices which are connected to the live wire of a household electric circuit
In a house two 60 W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours everyday. Calculate the electric consumed in 30 days.
An electric heater of resistance 8 Ω takes a current of 15 A from the mains supply line. Calculate the rate at which heat is developed in the heater.
Name the S.I unit of electrical energy. How is it related to Wh?
Which cable, one rated 15A and the other rated 5A will be thicker? Give a reason.
What is the order of current drawn by appliances connected to the ‘light circuit’ of a household?
You are required to connect a bulb, a fan and a socket outlet to the mains in one set A and an air-conditioner and a refrigerator to the mains in other set B. Will you recommend the wire of same thickness and same insulation in both? explain your answer.
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate total current taken from the supply.
A torch bulb is rated at 3 V and 600 mA. Calculate it’s
- power
- resistance
- energy consumed if it is used for 4 hours.
