Advertisements
Advertisements
Question
Which material is the calorimeter commonly made of? Give one reason for using this material.
Advertisements
Solution
Copper. It is good conductor of heat.
RELATED QUESTIONS
The SI unit of energy is :
(a) joule
(b) coulomb
(c) watt
(d) ohm-metre
A current passes through a resistor. Let K1 and K2 represent the average kinetic energy of the conduction electrons and the metal ions, respectively.
An immersion heater rated 1000 W, 220 V is used to heat 0.01 m3 of water. Assuming that the power is supplied at 220 V and 60% of the power supplied is used to heat the water, how long will it take to increase the temperature of the water from 15°C to 40°C?
Why is heating element wound on a long porcelain rod in a room heater.
Name a metal that is used as an electron emitter. Give one reason for using this metal.
How is the amount of heat produced calculated due to the passage of current in a metallic conductor? Derive an expression for it.
A family uses a light bulb of 100W, a fan of 100W, and a heater of 1000W, each for 8 hours a day. If the cost of electricity is Rs. 2 per unit, what is the expenditure to the family per day, on electricity?
1 mV is equal to:
Compare the power used in the 2 Ω resistor in each of the following circuits:
- a 6 V battery in series with 1 Ω and 2 Ω resistors
- a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
