Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated 220 volt and 100 watt is connected ( 220× 8 ) volt sources, then the actual power would be
21
Sep
The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated 220 volt and 100 watt is connected ( 220× 8 ) volt sources, then the actual power would be The resistance of the filament of an electric bulb changes with temperature. If an electric bulb rated 220 volt [...]
For ensuring dissipation of same energy in all three resistors ( R1, R2, R3 ) connected as shown in figure, their values must be related s
21
Sep
For ensuring dissipation of same energy in all three resistors ( R1, R2, R3 ) connected as shown in figure, their values must be related s For ensuring dissipation of same energy in all three resistors ( R1 R2 R3 ) connected as shown in figure their values must be related s September 21, 2020 [...]
In the following circuit, 18 Ω resistor develops 2 J/sec due to current flowing through it. The power developed across 10 Ω resistance is
21
Sep
In the following circuit, 18 Ω resistor develops 2 J/sec due to current flowing through it. The power developed across 10 Ω resistance is 18 Ω resistor develops 2 J/sec due to current flowing through it. The power developed across 10 Ω resistance is In the following circuit September 21, 2020 Category: Uncategorised (JEE Advanced [...]
The resistance of the filament of a lamp increases with the increase in temperature. A lamp rated 100 W and 220 V is connected across 220 V power supply. If the voltage drops by 10 %, then the power of the lamp will be
21
Sep
The resistance of the filament of a lamp increases with the increase in temperature. A lamp rated 100 W and 220 V is connected across 220 V power supply. If the voltage drops by 10 %, then the power of the lamp will be The resistance of the filament of a lamp increases with the [...]
If the length of the filament of a heater is reduced by 10 %, the power of the heater will
21
Sep
If the length of the filament of a heater is reduced by 10 %, the power of the heater will If the length of the filament of a heater is reduced by 10 % the power of the heater will September 21, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
The three resistance A, B and C have values 3R, 6R and R respectively.When some potential difference is applied across the network,the thermal powers dissipated by A, B and C are in the ratio
21
Sep
The three resistance A, B and C have values 3R, 6R and R respectively.When some potential difference is applied across the network,the thermal powers dissipated by A, B and C are in the ratio 6R and R respectively.When some potential difference is applied across the network B and C are in the ratio B and [...]
Two identical electric lamps marked 500 W, 220 V are connected in series and then joined to a 110 V line. The power consumed by each lamp is
21
Sep
Two identical electric lamps marked 500 W, 220 V are connected in series and then joined to a 110 V line. The power consumed by each lamp is 220 V are connected in series and then joined to a 110 V line. The power consumed by each lamp is Two identical electric lamps marked 500 [...]
Battery shown in figure has e.m.f. `E` and internal resistance `r`. Current in the circuit can be varied by sliding the contact `J`. If at any instant current flowing through the circuit is `I`, potential difference between terminals of the cells is `V`, thermal power generated in the cell is equal to `eta` fraction of total electrical power generated in it, then which of the following graphs is correct ?
21
Sep
Battery shown in figure has e.m.f. `E` and internal resistance `r`. Current in the circuit can be varied by sliding the contact `J`. If at any instant current flowing through the circuit is `I`, potential difference between terminals of the cells is `V`, thermal power generated in the cell is equal to `eta` fraction of [...]
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Battery shown in figure has e.m.f. `E` and internal resistance `r`. Current in the circuit can be varied by sliding the contact `J`. If at any instant current flowing through the circuit is `I` ,
potential difference between terminals of the cells is `V` ,
then which of the following graphs is correct ? ,
thermal power generated in the cell is equal to `eta` fraction of total electrical power generated in it ,
(A) Consider circuit in figure. How much energy is absorbed by electrons from the initial state of no current (Ignore thermal motion) to the state of drift velocity? (b) electrons give up energy at the rate of RI2 per second tot he thermal energy. What time scale would number associate with energy in problem (a)? n= number of electron/volume = 10^29 m^3 length of circuit=10 cm, cross-section A=(1 mm )2
21
Sep
(A) Consider circuit in figure. How much energy is absorbed by electrons from the initial state of no current (Ignore thermal motion) to the state of drift velocity? (b) electrons give up energy at the rate of RI2 per second tot he thermal energy. What time scale would number associate with energy in problem (a)? [...]
If the cell of emf 5 volt shown in the figure gives a power of 10 W, find the powers consumed by the resistors 2 ohm and 1 ohm
21
Sep
If the cell of emf 5 volt shown in the figure gives a power of 10 W, find the powers consumed by the resistors 2 ohm and 1 ohm find the powers consumed by the resistors 2 ohm and 1 ohm If the cell of emf 5 volt shown in the figure gives a power [...]