Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
When an electric heater is switced on, the current flowing through it i) is plotted against time (t). Taking in to account the variation of resistance with temperature, which of the folllowing best represents the resulting curve.
21
Sep
When an electric heater is switced on, the current flowing through it i) is plotted against time (t). Taking in to account the variation of resistance with temperature, which of the folllowing best represents the resulting curve. the current flowing through it i) is plotted against time (t). Taking in to account the variation of [...]
Power P is to be delivered to a device via transmission cables having resistance Rc. If V is the voltage across R and I the current through it , find the power wasted and how can it be reduced.
21
Sep
Power P is to be delivered to a device via transmission cables having resistance Rc. If V is the voltage across R and I the current through it , find the power wasted and how can it be reduced. find the power wasted and how can it be reduced. Power P is to be delivered [...]
A room AC run for 5 hour at a voltage of 220 V The wiring of the room constant of Cu of 1 mm ratio and a length of 10 m consumption per day is 10 commerclal unit What fraction of it goes in the joule heated in wire? What would happen if the wiring is made of aluminum of the same distances? [ρcu = 1.7 × 10^−8Ω, ρA1 = 2.7 × 10^−8 Ω m]
21
Sep
A room AC run for 5 hour at a voltage of 220 V The wiring of the room constant of Cu of 1 mm ratio and a length of 10 m consumption per day is 10 commerclal unit What fraction of it goes in the joule heated in wire? What would happen if the wiring [...]
A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in
21
Sep
A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated [...]
Two bulbs consume same energy when operated at 200 V and 300 V , respectively . When these bulbs are connected in series across a dc source of 500 V, then
20
Sep
Two bulbs consume same energy when operated at 200 V and 300 V , respectively . When these bulbs are connected in series across a dc source of 500 V, then respectively . When these bulbs are connected in series across a dc source of 500 V then Two bulbs consume same energy when operated [...]
If resistance of the filament increases with temperature, what will be power dissipated in a 220 V – 100 W lamp when connected to 110 V power supply
20
Sep
If resistance of the filament increases with temperature, what will be power dissipated in a 220 V – 100 W lamp when connected to 110 V power supply If resistance of the filament increases with temperature what will be power dissipated in a 220 V - 100 W lamp when connected to 110 V power [...]
An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle.
20
Sep
An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle. An [...]
An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle boils in 5 minutes. When the other coil is used the water boils in 10 minutes.If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be
20
Sep
An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle boils in 5 minutes. When the other coil is used the water boils in 10 minutes.If both the coils are connected in parallel, the time taken by the same quantity of water [...]
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An electric kettle has two heating coils. When one of the coils is connected to an a.c. source ,
the time taken by the same quantity of water to boil will be ,
the water in the kettle boils in 5 minutes. When the other coil is used the water boils in 10 minutes.If both the coils are connected in parallel ,
Two wires A and B of same material and mass have their lengths in the ratio 1 : 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5 W. The rate of heat B dissipation in A, is
20
Sep
Two wires A and B of same material and mass have their lengths in the ratio 1 : 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5 W. The rate of heat B dissipation in A, is is the rate of heat dissipation in [...]
Two wires A and B of the same material have lengths in the ratio 1 : 2 and radii in the ratio 2 : 1. The two wires are connected in parallel across a battery. The ratio of the heat produced in A to the heat produced in B for the same time is
20
Sep
Two wires A and B of the same material have lengths in the ratio 1 : 2 and radii in the ratio 2 : 1. The two wires are connected in parallel across a battery. The ratio of the heat produced in A to the heat produced in B for the same time is A [...]