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Two tanks A and B contain water at 30 C and 80 C, respectively: calculate the amount of water that must be taken from each tank respectively to prepare 40 kg of water at 50 C.
24
Oct
Two tanks A and B contain water at 30 C and 80 C, respectively: calculate the amount of water that must be taken from each tank respectively to prepare 40 kg of water at 50 C. respectively: calculate the amount of water that must be taken from each tank respectively to prepare 40 kg of [...]
A ball of thermal capacity 10 cal/C is heated to the temperature of furnance. It is then transferred into a vessel containing water. The water equivalent of vessel and the contents is 200 g.
24
Oct
A ball of thermal capacity 10 cal/C is heated to the temperature of furnance. It is then transferred into a vessel containing water. The water equivalent of vessel and the contents is 200 g. A ball of thermal capacity 10 cal/C is heated to the temperature of furnance. It is then transferred into a vessel [...]
A bulb of 100 W is connected in parallel to an ideal inductance of 1 H . This arrangement is connected to a 90 V battery through a switch . On pressing the switch the
24
Oct
A bulb of 100 W is connected in parallel to an ideal inductance of 1 H . This arrangement is connected to a 90 V battery through a switch . On pressing the switch the A bulb of 100 W is connected in parallel to an ideal inductance of 1 H . This arrangement is [...]
A drilling machine of 10 kW power is used to drill a bore in a small aluminium block of mass 8 kg. If 50% of power is used up in heating the machine itself or lost to the surroundings then
24
Oct
A drilling machine of 10 kW power is used to drill a bore in a small aluminium block of mass 8 kg. If 50% of power is used up in heating the machine itself or lost to the surroundings then A drilling machine of 10 kW power is used to drill a bore in a [...]
The coefficient of linear expansion of glass is alpha g per C and the cubical expansion of mercury is lemda m per C. The volume of the bulb of a mercury thermometer at 0 C is V0 and cross section
24
Oct
The coefficient of linear expansion of glass is alpha g per C and the cubical expansion of mercury is lemda m per C. The volume of the bulb of a mercury thermometer at 0 C is V0 and cross section The coefficient of linear expansion of glass is alpha g per C and the cubical [...]
Calculate the compressional force required to prevent the metallic rod of length l cm and cross-sectional area A cm^2 when heated through t C, from expanding lengthwise.
24
Oct
Calculate the compressional force required to prevent the metallic rod of length l cm and cross-sectional area A cm^2 when heated through t C, from expanding lengthwise. Calculate the compressional force required to prevent the metallic rod of length l cm and cross-sectional area A cm^2 when heated through t C from expanding lengthwise. October [...]
The current i in an induction coil varies with time according to the graph shown in figure. Which of the following graphs shows induced emf in the coil with time :
24
Oct
The current i in an induction coil varies with time according to the graph shown in figure. Which of the following graphs shows induced emf in the coil with time : The current i in an induction coil varies with time according to the graph shown in figure. Which of the following graphs shows induced [...]
A uniform brass disc of radius a and mass m is set into spinning with angular speed omega 0 about an axis passing through centre of disc and perpendicular to the plane of disc.
24
Oct
A uniform brass disc of radius a and mass m is set into spinning with angular speed omega 0 about an axis passing through centre of disc and perpendicular to the plane of disc. A uniform brass disc of radius a and mass m is set into spinning with angular speed omega 0 about an [...]
In the circuit shown in figure, sliding contact is moving with uniform velocity towards right. Its value at some instance is 12 ohm. The current in the circuit at this instant of time will be
24
Oct
In the circuit shown in figure, sliding contact is moving with uniform velocity towards right. Its value at some instance is 12 ohm. The current in the circuit at this instant of time will be In the circuit shown in Figure sliding contact is moving with uniform velocity towards right. Its value at some instance [...]
A piece of metal floats in mercury. The coefficients of volume expansion of the metal and mercury are lemda 1 and lemda 2, respectively. If the temperatures of both mercury and the metal
24
Oct
A piece of metal floats in mercury. The coefficients of volume expansion of the metal and mercury are lemda 1 and lemda 2, respectively. If the temperatures of both mercury and the metal A piece of metal floats in mercury. The coefficients of volume expansion of the metal and mercury are lemda 1 and lemda [...]