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.
APPEARS IN
संबंधित प्रश्न
Electrical power p is given by the expression P = (Q × V) ÷ time. Express the power P in terms of current and resistance explaining the meaning of symbols used there in.
Calculate the current through a 60 W lamp rated for 250 V. If the line voltage falls to 200 V, how is the power consumed by the bulb affected?
Why is heating coil wound in the form of a helix in electric stove?
Name two common material used for heating elements.
In an electric radiator or room heater, state with reason, why the porcelain tube wound with a nichrome wire is placed between the pole and principal focus of the parabolic concave reflector.
If the rating of an electric bulb is 100W – 230V, Explain its meaning.
How does the heat produced by die passage of current in a metallic wire depend on the resistance of the wire.
With reference to the diagram shown below calculate:

(i) The equivalent resistance between P and Q.
(ii) The reading of ammeter.
(iii) The electrical power between P and Q.
Out of the three fuses with current ratings 5A, 10A, 15A, which one is to be connected in a geyser circuit marked 3 kW, 220V? Give reason for your answer.
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.
