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In the circuit shown in the figure, two resistors R1 and R2 have been connected in series to an ideal cell. When a voltmeter is connected across R1 its reading is V1 = 4.0 volt and when the same voltmeter is connected across R2 its reading is V2=6.0 volt. The reading of the voltmeter when it is connected across the cell is V3 = 12.0 volt. Find the actual across R1 in the circuit.
03
Sep
In the circuit shown in the figure, two resistors R1 and R2 have been connected in series to an ideal cell. When a voltmeter is connected across R1 its reading is V1 = 4.0 volt and when the same voltmeter is connected across R2 its reading is V2=6.0 volt. The reading of the voltmeter when [...]
In the circuit shown in figure AB is a uniform wire of length L = 5 m. It has a resistance of 2Ω/m. When AC=2.0 m, it was found that the galvanometer shows zero reading when switch s is placed in either of the two positions 1 or 2. find the emf E1.
03
Sep
In the circuit shown in figure AB is a uniform wire of length L = 5 m. It has a resistance of 2Ω/m. When AC=2.0 m, it was found that the galvanometer shows zero reading when switch s is placed in either of the two positions 1 or 2. find the emf E1. In the [...]
A uniform disc of radius 5.0 cm and mass 200 g is fixed at its centre to a metal wire, the other end of which is fixed to a ceiling. The hanging disc is rotated about the wire through an angle and is released. If the disc makes torsional oscillations with time period
03
Sep
A uniform disc of radius 5.0 cm and mass 200 g is fixed at its centre to a metal wire, the other end of which is fixed to a ceiling. The hanging disc is rotated about the wire through an angle and is released. If the disc makes torsional oscillations with time period A uniform [...]
A potentiometer wire has a length of 10 m and resistance 4Ωm−1. An accumulator of emf 2V and a resistance box are connected in series with it. Culculate the resistance to be introduced in the box so as to get a potential gradient of (a) 0.1 V/m and (b) 0.1m Vm/s.
03
Sep
A potentiometer wire has a length of 10 m and resistance 4Ωm−1. An accumulator of emf 2V and a resistance box are connected in series with it. Culculate the resistance to be introduced in the box so as to get a potential gradient of (a) 0.1 V/m and (b) 0.1m Vm/s. A thin uniform wire [...]
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A thin uniform wire AB of length 1 m ,
an unknown resistance X and a resistance of 12Ω are connected by thick conducting strips ,
consisting of two resistors X and Y together in parallel with a meter long constantan wire of uniform cross section. Which the help of a movable contact D ,
Figure shows a meter bridge (which is nothing but a practical Wheatstone bridge) ,
if one decides to balance a resistance of 4 X against Y ,
In a meter bridge experiment null point is obtained at 20 cm. from one end of the wire when resistance X is balanced against another resistance Y. If XltY ,
then where will be the new position of the null point from the same end ,
An L-shaped bar of mass M is pivoted at one of its end so that it can freely rotate in a vertical plane, as shown in the figure. (a) Find the value of theta0 at equilibrium. (b) If it is slightly displaced from its
03
Sep
An L-shaped bar of mass M is pivoted at one of its end so that it can freely rotate in a vertical plane, as shown in the figure. (a) Find the value of theta0 at equilibrium. (b) If it is slightly displaced from its An L-shaped bar of mass M is pivoted at one of [...]
Figure shows a potentiometer with a cell of emf 2.0 V and internal resistance 0.4Ω maintaining a potential drop across the resistor wire AB. A standard cell that maintains a constant emf of 1.02 V (for very moderate current up to emf μA) gives a balance point at 67.3 cm length of the wire. To ensure very low current is drawn the standard cell, a very high resistance of 600 kΩ is put in series with it, which is shorted close to the balance point. The standard cell is then replaced by a cell of unknown emf ε and the balance point found, similary, turns out to be at 82.3cm length of the wire. a. What is the value of ε? b.What purpose does the high resistance of 600kΩ have? c. Is the balance point affected by this high resistance? d. Is the balance point affected by internal resistance of the driver cell? e. Would the method work in the above situation if the driver cell of the potentiometer had an emf of 1.0V instead of 2.0V? f. Would the circuit work well for determining an extermely small emf, say of the order of a few mV (such as the typical emf of a thermocouple)? If not, how will you modify the circuit ?
03
Sep
Figure shows a potentiometer with a cell of emf 2.0 V and internal resistance 0.4Ω maintaining a potential drop across the resistor wire AB. A standard cell that maintains a constant emf of 1.02 V (for very moderate current up to emf μA) gives a balance point at 67.3 cm length of the wire. To [...]
Tags:
A thin uniform wire AB of length 1 m ,
an unknown resistance X and a resistance of 12Ω are connected by thick conducting strips ,
consisting of two resistors X and Y together in parallel with a meter long constantan wire of uniform cross section. Which the help of a movable contact D ,
Figure shows a meter bridge (which is nothing but a practical Wheatstone bridge) ,
if one decides to balance a resistance of 4 X against Y ,
In a meter bridge experiment null point is obtained at 20 cm. from one end of the wire when resistance X is balanced against another resistance Y. If XltY ,
then where will be the new position of the null point from the same end ,
what is the period of a pendulum formed by pivoting a metre stick so that it is free to rotate about a horizontal axis passing through the 75 cm mark?
03
Sep
what is the period of a pendulum formed by pivoting a metre stick so that it is free to rotate about a horizontal axis passing through the 75 cm mark? what is the period of a pendulum formed by pivoting a metre stick so that it is free to rotate about a horizontal axis passing [...]
Consider the potentiometer circuit as arranged in the figure (32−E29). The potentiometer wire is 600 cm long. (a) At what distance from the point A should the jockey touch the wire to get zero deflection in the galvanometer? (b) If the jockey touches the wire at a distance of 560 cm from A, what will be the current in the galvanometer?
03
Sep
Consider the potentiometer circuit as arranged in the figure (32−E29). The potentiometer wire is 600 cm long. (a) At what distance from the point A should the jockey touch the wire to get zero deflection in the galvanometer? (b) If the jockey touches the wire at a distance of 560 cm from A, what will [...]
Tags:
A thin uniform wire AB of length 1 m ,
an unknown resistance X and a resistance of 12Ω are connected by thick conducting strips ,
consisting of two resistors X and Y together in parallel with a meter long constantan wire of uniform cross section. Which the help of a movable contact D ,
Figure shows a meter bridge (which is nothing but a practical Wheatstone bridge) ,
if one decides to balance a resistance of 4 X against Y ,
In a meter bridge experiment null point is obtained at 20 cm. from one end of the wire when resistance X is balanced against another resistance Y. If XltY ,
then where will be the new position of the null point from the same end ,
Derive an expression for the angular frequency of small oscillation of the bob of a simple pendulum when it is immersed in a liquid of density
03
Sep
Derive an expression for the angular frequency of small oscillation of the bob of a simple pendulum when it is immersed in a liquid of density Derive an expression for the angular frequency of small oscillation of the bob of a simple pendulum when it is immersed in a liquid of density September 3, 2020 [...]
In the previous question if the second pendulum bob is thrown at velocity v2 at an angle beta from mean position, but on other side of mean position, find the phase difference in the two SHMs now
03
Sep
In the previous question if the second pendulum bob is thrown at velocity v2 at an angle beta from mean position, but on other side of mean position, find the phase difference in the two SHMs now but on other side of mean position find the phase difference in the two SHMs now In the [...]