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Circuit diagram of a wheatstone brigde in which Resistance 1=Resistance 2=Resistance 3=Varrying Resistance 4 = 1000ohms and Emf =20volts. The galvanometer can detect as low as 0.1milliamperes. Determine;

1. Internal resistance of the bridge being measured across the terminal.
2. Output voltage due to unbalanced conditions.
3. Current through the galvanometer for unbalanced conditions.

Small charge in the resistance that can be detected.

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A solenoid, 1.2meters long is uniformly wound with 800 turns.A search coil of mean diameter 30millimeter wound with 50 turns, is place at the center of the solenoid and connected to a ballastic galvanometer.The total resistance of the search coil circuit is 2000ohms. When a current of 5ampere through the solenoid is reversed, the deflection on the galvanometer scale is 85 division. Taking free space permeability 4π×10^-7Hm. Determine the ballastic constant of the galvanometer in coulombs per unit deflection?

How can I decrease Voltage in this circuit to 220 volts output?

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Circuit diagram of ammeter-voltmeter method of unknown resistance measurement. The voltmeter has a resistance of 5000 ohms and the full scale current of the ammeter is 1ampere. The accuracy of ammeter-voltmeter is +or - 0.5% at full scale. In the measurement the reading were 0.55ampere and 37.6ampere. calculate, 1.measured value of the resistors.

2. Calculate true value of the resistor

3.calculate error in ammeter reading

4. Calculate percentage error in ammeter reading at 0.55ampere

How can we calculate the internal resistance, voltage out put due to unbalanced condition, current through galvanometer for unbalanced and smallest charge in resistance that can be detected of a wheatstone brigde given that Resistance 1=Resistance 2= varrying Resistance 3=Resistance 4=1000 ohms and a galvanometer can detect as low as 0.1 milliamperes?