Cengage JEE Mains Physics by B.M Sharma
In the circuit in Fig., bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow?
06
Dec
In the circuit in Fig., bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow? bulb `B` does not glow although ammeter `A` indicates that the current is flowing . Why does the bulb not glow? In the circuit in Fig. December 6, 2020 [...]
A potentiometer arrangement is shows in Fig. 6.62. The driver cell has emf e and internal resistance r. The resistance of potentiometer wire AB is R.F is the cell of emf e/3 and internal resistance r/3. Balance point (J) can be obtained for all finite value of
06
Dec
A potentiometer arrangement is shows in Fig. 6.62. The driver cell has emf e and internal resistance r. The resistance of potentiometer wire AB is R.F is the cell of emf e/3 and internal resistance r/3. Balance point (J) can be obtained for all finite value of If a shunt 1/10 of the coil resistance [...]
In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings, respectively, are
06
Dec
In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings, respectively, are are In Fig.` the voltmeter and ammeter shows are ideal. Then voltmeter and ammeter readings respectively December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 20 - Heating Effects of Current and Instruments ,
Three voltmeters are connected as shown. A potential difference has been applied between A and B. On closing the switch S, readings of voltmeters?
06
Dec
Three voltmeters are connected as shown. A potential difference has been applied between A and B. On closing the switch S, readings of voltmeters? readings of voltmeters ? Three voltmeters are connected as shown A potential difference has been applied between A and B. On closing the switch S December 6, 2020 Category: Cengage JEE [...]
A constant potential difference is applied across a resistance. Consider variation of resistance with temperature. Which graph represents best the variation of power produced in resistance versus resistance?
06
Dec
A constant potential difference is applied across a resistance. Consider variation of resistance with temperature. Which graph represents best the variation of power produced in resistance versus resistance? Figure shows a balanced Wheatstone net. Now it is disturbed by changing P to 11 ohm. Which of the following steps will not bring the bridge to [...]
An ammeter is obtained by shunting a 30 Ω galvanometer with a 30Ω resistance. What additional shunt should be connected across it to double the range?
06
Dec
An ammeter is obtained by shunting a 30 Ω galvanometer with a 30Ω resistance. What additional shunt should be connected across it to double the range? An ammeter is obtained by shunting a 30 Ω galvanometer with a 30Ω resistance. What additional shunt should be connected across it to double the range? December 6, 2020 [...]
Two moving coil galvanometers 1 and 2 are with identical field magnets and suspension torque constants, but with coil of different number of turns N1 and N2 , area per turn A1 and A 2 , and resistance R1 and R2. When they are connected in series in the same circuit, they show defections θ1 and θ2. Then θ1/θ2 is
06
Dec
Two moving coil galvanometers 1 and 2 are with identical field magnets and suspension torque constants, but with coil of different number of turns N1 and N2 , area per turn A1 and A 2 , and resistance R1 and R2. When they are connected in series in the same circuit, they show defections θ1 [...]
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Cengage JEE Mains Physics by B.M Sharma
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Chapter 20 - Heating Effects of Current and Instruments
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and resistance R1 and R2. When they are connected in series in the same circuit ,
area per turn A1 and A 2 ,
but with coil of different number of turns N1 and N2 ,
they show defections θ1 and θ2. Then θ1/θ2 is ,
Two moving coil galvanometers 1 and 2 are with identical field magnets and suspension torque constants ,
A galvanometer has a resistance of 3663 ohm. A shunt S is connected across it such that 1/34 of the total current passes through the galvanometer. the external resistance that must be connected in series with the main circuit so that the total current in the main circuit remains unaltered even when the galvanometer is shunted is
06
Dec
A galvanometer has a resistance of 3663 ohm. A shunt S is connected across it such that 1/34 of the total current passes through the galvanometer. the external resistance that must be connected in series with the main circuit so that the total current in the main circuit remains unaltered even when the galvanometer is [...]
A voltmeter has a resistance of G ohms and range V volts. The value of resistance used in series to convert it into voltmeter of range nV volt is
06
Dec
A voltmeter has a resistance of G ohms and range V volts. The value of resistance used in series to convert it into voltmeter of range nV volt is A voltmeter has a resistance of G ohms and range V volts. The value of resistance used in series to convert it into voltmeter of range [...]
A galvanometer has a resistance of 3663 ohm. A shunt S is connected across it such that 1/34 of the total current passes through the galvanometer. The value of the shunt is
06
Dec
A galvanometer has a resistance of 3663 ohm. A shunt S is connected across it such that 1/34 of the total current passes through the galvanometer. The value of the shunt is A galvanometer has a resistance of 3663 ohm. A shunt S is connected across it such that 1/34 of the total current passes [...]