What is the resistance of galvanometer by half deflection method?
Resistance of given galvanometer is 7.79 ohm . Figure of merit of given galvanometer is 0.545 A/dn . All connections should be neat and tight .
How do you calculate the resistance of a galvanometer?
1. By closing the key K2 and adjusting the value of resistance in resistance box RBOX 2, you get the deflection θ/2 in the galvanometer. Then the resistance S equals G, the resistance of galvanometer, because half of the current passing through R is shared by S and half by galvanometer.
Why do we use half deflection method to find resistance of galvanometer?
When the key K2 is also closed the galvanometer and shunt resistance will be in and parallel and net resistance will be reduced. This time the deflection shown in the galvanometer will reduce to half. Thus this method is known as the half deflection method.
What is half deflection method Class 12?
The half deflection technique is the strategy by which an inner opposition of a cell can help in assessing esteem which is considered as high. The diversion of half is considered as a worth acquired alongside the cell alone.
What is the resistance of galvanometer?
The galvanometer coil has a small resistance about 100 ohms. The galvanometer is used to detect small electric current in the circuit.
What happens in half deflection method?
The half deflection method is the method by which an internal resistance of a cell can help in evaluating value which is considered as high. The deflection of half is considered as a value obtained along with the cell alone.
How is galvanometer deflection calculated?
If the south pole of the magnet is brought towards the solenoid, the galvanometer shows deflection. Current flows in the coil of the solenoid in the clockwise direction and the galvanometer shows deflection towards the left.
What do you understand by half deflection method?
What is principle of half deflection method?
Which type of galvanometer is used in the half deflection method experiment?
weston type galvanometer
A weston type galvanometer, a voltmeter, a battery or battery eliminator, two (10,000 Ω and 200 Ω) resistance boxes, two one-way keys, a rheostat, a screw gauge, a metre scale, an ammeter of given range, connecting wires and a piece of sand paper.
What is the internal resistance of galvanometer?
A galvanometer having internal resistance 10Ω requires 0.01 A for a full scale deflection. To convert this galvanometer to a voltmeter of full-scale deflection at 120V, we need to connect a resistance of.
What is the resistance of a galvanometer?
What is the use of half deflection method?
Is resistance of galvanometer constant?
Abstract. The values of galvanometer resistance which are obtained by the two half-deflection methods (constant-voltage versus constant-current sources) are often found to differ because of nonlinearity in the galvanometer response.
What is half deflection method?
What is galvanometer PDF?
A galvanometer is a device that is used to detect small electric current or measure its magnitude. The current and its intensity is usually indicated by a magnetic needle’s movement or that of a coil in a magnetic field that is an important part of a galvanometer.
What is the resistance of the galvanometer?
The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A.
What do you mean by resistance of galvanometer?
In both cases the galvanometer resistance equals the resistance which halves the initial deflection on the supposition of proportionality between galvanometer current and deflection.
How to connect galvanometer by half deflection?
Where n is the total number of dimension on the galvanometer scale on either side of zero . 1. Resistance of galvanometer by half deflection method Make the connections accordingly as shown in circuit diagram . Take out the high resistance (200 Ohm ) from the resistance box R and insert key K1 only .
What is the unit of half deflection method?
Its unit is ampere per division . Why is this method called half deflection method? It is so because the deflection is made half by using a shunt resistance S. Under what condition id the resistance of a galvanometer (E 1) equal to shunt resistance (S)?
How do you calculate shunt resistance in a galvanometer?
Where R is the resistance connected in series with the galvanometer and S is the shunt resistance. The figure of merit, K =E / [ (R+G)Q] (2) Where E is the end of the cell and Q is the deflection produced with resistance R. The maximum current that can pass through the galvanometer, I g =nk
What is E and Q in a galvanometer?
Where E is the end of the cell and Q is the deflection produced with resistance R. Where n is the total number of dimension on the galvanometer scale on either side of zero . 1. Resistance of galvanometer by half deflection method