[" Time taken by a "836" W heater to heat one litre of "],[" water from "10^(@)C" to "40^(@)C" is: "],[[" (a) "50s," (b) "100s],[" (c) "150s," (d) "200s]]

Time taken by a 836 W heater to heat 1 litre of water from 10^@C to 40^@C is

An immersion heater is rated 836 watt . It should heat 1 litre of water from 10^(@)C to 40^(@)C in about

An immersion heater is rated 836 watt. In what time, it should heat 1 litre of water from 20^@C to 40^@C ? J = 4.18 J//cal .

What will be the time required to heat a 15 l bucket full of water from 20^(@)C to 40^(@)C using a 1500 W immersion heater?

When water is heated from 0^(@)C to 10^(@)C , the volume of water

(i). Find the time taken by a filament of 200 W to heat 500 ml of water from 25^(@) C to 75 ^(@) C . Specific heat of water is 1 calg^(-1@) C^(-1) . Take 1 cal = 4.2 J . (ii) Find the power produced by each resistor shown in Fig. 7.17 . If R_(1) is dipped in 1000 ml of water at 30^(@) C , find the time taken by it to boil the water.

(i). Find the time taken by a filament of 200 W to heat 500 ml of water from 25^(@) C to 75 ^(@) C . Specific heat of water is 1 calg^(-1@) C^(-1) . Take 1 cal = 4.2 J . (ii) Find the power produced by each resistor shown in Fig. 7.17 . If R_(1) is dipped in 1000 ml of water at 30^(@) C , find the time taken by it to boil the water.

The heater coil of an electric kettle is rated as 2000W at 200V. How much time will it take to heat one litre of water from 20^(@)C to 100^(@)C assming that entire electric energy liberated form the heater coil is utilised for heating water? Also calculate the resistance of the coil. Density of water is 1g cm^(-3) .