Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
A fuse with a circular cross sectional radius of 0.15 mm blows at 15 A . what should be the radius of the cross section of a fuse made of the same material that blows at 30 A?
15
Nov
A fuse with a circular cross sectional radius of 0.15 mm blows at 15 A . what should be the radius of the cross section of a fuse made of the same material that blows at 30 A? A fuse with a circular cross sectional radius of 0.15 mm blows at 15 A . what [...]
An electric motor operating on a 50 V dc supply draws a current of 12 A. If the effenciency of the motor is 30 % estimate the resistance of the windings of the motor .
15
Nov
An electric motor operating on a 50 V dc supply draws a current of 12 A. If the effenciency of the motor is 30 % estimate the resistance of the windings of the motor . An electric motor operating on a 50 V dc supply draws a current of 12 A. If the effenciency of [...]
A house is fitted with seven tubelights of rating 220V,40W each , two bulbs of rating 220V,60Weach, five fans each drawing a current of 0.4at220V, and a heater of resistance 48.4Ω. The main line power supplied to the house is at 220V. Calculate the bill for the month of january if tubelights and bulbs are used for 6h daily, fans for 1h daily , and heater for 10h daily. The electricity is to cost Rs.2per unit.
15
Nov
A house is fitted with seven tubelights of rating 220V,40W each , two bulbs of rating 220V,60Weach, five fans each drawing a current of 0.4at220V, and a heater of resistance 48.4Ω. The main line power supplied to the house is at 220V. Calculate the bill for the month of january if tubelights and bulbs are [...]
Tags:
40W each ,
60Weach ,
A house is fitted with seven tubelights of rating 220V ,
and a heater of resistance 48.4Ω. The main line power supplied to the house is at 220V. Calculate the bill for the month of january if tubelights and bulbs are used for 6h daily ,
and heater for 10h daily. The electricity is to cost Rs.2per unit. ,
fans for 1h daily ,
five fans each drawing a current of 0.4at220V ,
two bulbs of rating 220V ,
Two wires of the same material and having the same uniform area of cross section are connected in an electric circuit. The masses of the wires are mand2m, respectively. When a current I flows through both of them connected in series, then find the ratio of heat produced in them in a given time .
15
Nov
Two wires of the same material and having the same uniform area of cross section are connected in an electric circuit. The masses of the wires are mand2m, respectively. When a current I flows through both of them connected in series, then find the ratio of heat produced in them in a given time . [...]
Tags:
respectively. When a current I flows through both of them connected in series ,
then find the ratio of heat produced in them in a given time . ,
Two wires of the same material and having the same uniform area of cross section are connected in an electric circuit. The masses of the wires are mand2m ,
We have a 30 W , 6 V bulb , which we want to glow by a supply of 120 V . what can be done for this ?
15
Nov
We have a 30 W , 6 V bulb , which we want to glow by a supply of 120 V . what can be done for this ? 6 V bulb We have a 30 W which we want to glow by a supply of 120 V . what can be done for this [...]
Water boils in an electric kettle in 15 min after being switched on. Using the same main supply , should the length of the heating element be increased or decreased if th ewater is to be boiled in 10 min? why ?
15
Nov
Water boils in an electric kettle in 15 min after being switched on. Using the same main supply , should the length of the heating element be increased or decreased if th ewater is to be boiled in 10 min? why ? should the length of the heating element be increased or decreased if th [...]
A house is fitted with certain numbers of 100 W, 230 V incandescent lamps. The power to the house is fed by a generator producing the power at 240V. The resistance of the wires from the generator to the house is 2Ω. Find the maximum number of lamps that can be illuminated so that the voltage across none of the lamps drops below 230 V.
15
Nov
A house is fitted with certain numbers of 100 W, 230 V incandescent lamps. The power to the house is fed by a generator producing the power at 240V. The resistance of the wires from the generator to the house is 2Ω. Find the maximum number of lamps that can be illuminated so that the [...]
Each of the three resistors in figure has a resistance of 2 ohm and can dissipate a maximum of 18 W without becoming excessively heated. Find the maximum power the circuit can dissipate .
15
Nov
Each of the three resistors in figure has a resistance of 2 ohm and can dissipate a maximum of 18 W without becoming excessively heated. Find the maximum power the circuit can dissipate . Each of the three resistors in figure has a resistance of 2 ohm and can dissipate a maximum of 18 W [...]
Two bulbs are marked 200 V , 300 W and 200 V , 600 W, respectivelly . The bulbs are connected in series and the combination is connected to a 200 V supply.
15
Nov
Two bulbs are marked 200 V , 300 W and 200 V , 600 W, respectivelly . The bulbs are connected in series and the combination is connected to a 200 V supply. 300 W and 200 V 600 W respectivelly . The bulbs are connected in series and the combination is connected to a [...]
A 25 W and a 100 W bulb are joined in series and connected to the mains. which bulb will glow brighter ?
15
Nov
A 25 W and a 100 W bulb are joined in series and connected to the mains. which bulb will glow brighter ? A 25 W and a 100 W bulb are joined in series and connected to the mains. which bulb will glow brighter ? November 15, 2020 Category: Uncategorised (JEE Advanced Physics by [...]