1. Calculate the value of a shunt resistor that is inserted in parallel with a galvanometer of resistance 10 Ω and full-scale defl ection of 45 mA, so as the galvanometer can act as an ammeter with full-scale defl ection of 3 A.
2. In order to convert a galvanometer into a voltmeter with a full-scale defl ection of 10 V, a resistor must be inserted in the circuit. How should the resistor be placed and what value should it be in order to work with a galvanometer of internal resistance 20 Ω and full-scale defl ection of 15 mA?
3. A particular galvanometer has an internal resistance of 200 Ω and a full-scale defl ection of 800 mA. What value of shunt resistance is needed to change this galvanometer to an ammeter of full-scale defl ection of 10 A?
4. A particular galvanometer has an internal resistance of 500 Ω and a full-scale defl ection of 4 mA. What value of shunt resistance is needed to change this galvanometer to a voltmeter of full-scale defl ection of 7.5 V?
5. A voltmeter with a full-scale defl ection of 10 V is required to be made by connecting a
resistor (R1) in series with a galvanometer. If the 100 Ω galvanometer has a full-scale defl ection of 50 mA, determine the value of resistance of R1.
6. If an ammeter is made from a 100 Ω galvanometer and shunt resistor of 2000 Ω, what is the value of the current passing through the galvanometer when the full-scale reading is 5 A?
