# College physcs

posted by .

A galvanometer with a full-scale sensitivity of 500 microA and a coil resistance of 60 ohms is to be used to build an ammeter designed to read 7.5 A. What is the required shunt resistance?
Rs = milliA

• College physcs -

Vf = If * Rg = 5*10^-4 * 60 = 0.03 Volts.

Rs = Vf/(7.5-IF).

## Similar Questions

1. ### College Physic

A galvanometer with a full-scale sensitivity of 500 microA and a coil resistance of 60 ohms is to be used to build an ammeter designed to read 7.5 A. What is the required shunt resistance?
2. ### energy conversion

A 5hp 230volt shunt motor takes 18 amp when operating at full load. The Shunt-field resistance is 115ohms and the armature resistance is 0.25 ohm. calculate the value of the starter resistor if the armature current is limited to 1.5 …
3. ### physics

The ammeter your physics instructor uses for in class demonstrations has a resistance R(g)= 60 ohms and requires a current of 1.0 mA for a full scale deflection. The same ammeter can be used to measure currents of much greater values …
4. ### Physics deflection ammeter

8. A galvanometer has a coil resistance of 100 ohms and gives a full scale deflection when the potential difference across it is 0.0002 V. What size resistor (with a value measured in ohms) is required to make a 1.0 A. full scale deflection …
5. ### Physics

The coil of wire in a galvanometer has a resistance of RC = 78.0 Ù. The galvanometer exhibits a full-scale deflection when the current through it is 0.440 mA. A resistor is connected in series with this combination so as to produce …
6. ### Physics

A ammeter is to be constructed using a galvanometer that has a 2.00 mA full-scale deflection and internal resistance of 50.0 ohms. It must be good enough to detect 40 mA, which is the max current. How would one do this?
7. ### Physics

When a moving coil galvanometer has a resistance of 20 ohms and gives full scale deflection of 1.5mA.calculate the potential difference across its terminals when the current is flowing
8. ### physics

The sensitivity of a galvanometer of resistance 990ohm is increased by 10 times.The shunt used is?
9. ### physics

1)a galvanometer has a resistance of 40 ohm and is of 3 mA full-scale deflection.how would you modify it to act as a 0-5 A ammeter?
10. ### science

A galvanometer of resistance 100  gives full scale deflection at 10 mA current. What should be the value of shunt so that it can measure a current of 100 mA?

More Similar Questions

Post a New Question