An electric Kettle has two thermal coils. When a current is passed in one of them, water in kettle boils in 6 minutes and when current is passed in other one, the water boils in 8 minutes. If both the coils are joined in (a) series (b) parallel, how long will it take in boiling water?

An electric kettle has two coils when one of the coils is switched on, the kettle can boil water inside it in 12 minutes to boil.when the other coil is switched on it took 24 minutes o boil.If the coils are connected in parallel and is swiched on , find the times taken for boiling of water.

How much quantity of heat will be evolved when 10 amp electric current is passed through a 30Omega resistance for 5 minutes?

Water boils in an electric kettle in 10 minutes after being switched on .How will you modify the heating coil to boil water is 5 minutes using the same source of power ?

An amount of water in an electric kettle reaches at its boiling point within 10 min. The same amount of water have to boil within 5min. Without changing heating coil and source To do this possible what should be the change of it?

Water is pouring into a conical vessel of diameter 5.2m. And slant height 6.8 m(as shown in the adjoining ) , at the rate of 1.8 m^(3) per minute .How long will it take to fill the vessel?

The magnets of two suspended coil galvanometers are of the same strength so that they produce identical magnetic fields in the region of the coils. The coil of the first one is in the shape of a square of side a and that of the second one is circular of radius a// sqrt(pi) . when the same current is passed through the coils, the ratio of the torque experinced by the first coil to the experinced by the second one is

An electric heating coil is connected in series with resistance of xOmega across the 240V mains, the coil being immersed in 1 kilogram of water at 20^@C. The temperature of the water rises to boiling point in 10 minutes. If the resistance x is short circuited, the time required to produce the same quantity of heat in 6 mins. Sb, the value of x is,

Two flasks of equal volume are connected by a narrow tube of negligible volume and are filled with N_(2) gas. When both the flasks are immersed in boiling water the gas pressure inside the system is 0.5 atm. Calculate the pressure of the system when one of the flasks is immersed in ice water while the other flask in boiling water.

The magnets of two suspended coil galvanometer are of the same strength so that they produce identical uniform magnetic fields in the region of the coils. The coil of the first one is in the shape of a square of side a and that of the second one is circular of radius (a)/(sqrtpi) . When the same current is passed throught the coils, the ratio of the torque experienced by the first coil to that rxperienced by the second one is