Chapter 3 – Current Electricity
A heating coil transforms 100J of electrical energy into heat energy per second. The coil is cut into two halves and both the halves are joined together in parallel to the same source. Now the energy transformed per second will be
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Dec
A heating coil transforms 100J of electrical energy into heat energy per second. The coil is cut into two halves and both the halves are joined together in parallel to the same source. Now the energy transformed per second will be If the current in an electric bulb drops by 1 % the power decreases [...]
Two resistances , connected in parallel across a source of negligible internal resistance, consumes four times the power that they would consume when connected in series across the same source. If one of the resistances is 10Ω the other is
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Two resistances , connected in parallel across a source of negligible internal resistance, consumes four times the power that they would consume when connected in series across the same source. If one of the resistances is 10Ω the other is connected in parallel across a source of negligible internal resistance consumes four times the power [...]
When a battery sends current through a resistance R1 for time t, the heat produced in the resistor is Q. When the same battery sends current through another resistance R2 for time t, the heat produced in R2 is again Q. The internal resistance of battery is
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Dec
When a battery sends current through a resistance R1 for time t, the heat produced in the resistor is Q. When the same battery sends current through another resistance R2 for time t, the heat produced in R2 is again Q. The internal resistance of battery is the heat produced in R2 is again Q. [...]
If the current in an electric bulb drops by 1 %, the power decreases by
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Dec
If the current in an electric bulb drops by 1 %, the power decreases by If the current in an electric bulb drops by 1 % the power decreases by December 2, 2020 Category: Cengage NEET by C.P Singh , Chapter 3 - Current Electricity , Part 2 ,
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance R, connected across the given cell, has values of (i) infinity (ii) 9.5Ω the balancing lengths on the potentiometer wire are found to be 3m and 2.85m, respectively. The value of internal resistance of the cell is
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Dec
A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used across the potentiometer wire, has an emf of 2.0V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance R, connected across the given cell, has values of (i) infinity [...]
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A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery ,
connected across the given cell ,
has an emf of 2.0V and a negligible internal resistance. The potentiometer wire itself is 4m long. When the resistance R ,
has values of (i) infinity (ii) 9.5Ω the balancing lengths on the potentiometer wire are found to be 3m and 2.85m ,
respectively. The value of internal resistance of the cell is ,
used across the potentiometer wire ,
In an experiment to measure the internal resistance of a cell by a potentiometer, it is found that the balance point is at a length of 2 m, when the cell is shunted by a 5 Ω resistance; and is at a length of 3 m, when the cell is shunted by a 10 Ω resistance. The internal resistance of the cell is, then
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Dec
In an experiment to measure the internal resistance of a cell by a potentiometer, it is found that the balance point is at a length of 2 m, when the cell is shunted by a 5 Ω resistance; and is at a length of 3 m, when the cell is shunted by a 10 Ω [...]
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In an experiment to measure the internal resistance of a cell by a potentiometer ,
it is found that the balance point is at a length of 2 m ,
then ,
when the cell is shunted by a 10 Ω resistance. The internal resistance of the cell is ,
when the cell is shunted by a 5 Ω resistance; and is at a length of 3 m ,
A potentiometer wire of length L and resistance 10Ω is connected in series with a battery of emf 2.5V and a resistance in its primary circuit. The null point corresponding to a cell of a emf 1V is obtained at a distance L/2. If the resistance in the primary circuit is doubled then the position of new null point will be.
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A potentiometer wire of length L and resistance 10Ω is connected in series with a battery of emf 2.5V and a resistance in its primary circuit. The null point corresponding to a cell of a emf 1V is obtained at a distance L/2. If the resistance in the primary circuit is doubled then the position [...]
A 2 volt battery, a 15Ω resistor and a potentiometer of 100cm length, all are connected in series. If the resistance resistance of potentiometer wire is 5Ω, then the potential gradient of the potentiometer wire is
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Dec
A 2 volt battery, a 15Ω resistor and a potentiometer of 100cm length, all are connected in series. If the resistance resistance of potentiometer wire is 5Ω, then the potential gradient of the potentiometer wire is a 15Ω resistor and a potentiometer of 100cm length A 2 volt battery all are connected in series. If [...]
In a potentiometer of one metre length an unknown emf voltage source is balanced at 60 cm length of potentiometer wire, while a 3v battery is balanced at 45 cm length. Then, the emf of the unknown voltage source is :
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In a potentiometer of one metre length an unknown emf voltage source is balanced at 60 cm length of potentiometer wire, while a 3v battery is balanced at 45 cm length. Then, the emf of the unknown voltage source is : In a potentiometer of one metre length an unknown emf voltage source is balanced [...]
In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance is
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Dec
In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. The value of unknown resistance X and the current drawn from the battery of negligible resistance is a meter bridge is in its balanced state. The meter bridge wire has a resistance 0.1 ohm/cm. [...]