# A moving-coil permanent-magnet instrument can be used as what by using a low resistance shunt?

19 views

## Your answer

 Thanks for your contribution. Feel free to answer this question. Please avoid short answer. Your answer is most welcome. Be genuine. Upload image or document: Your name to display (optional): Email me at this address if my answer is selected or commented on: Privacy: Your email address will only be used for sending these notifications. Anti-spam verification: Are you a robot ? (Y = Yes / N = No) .captcha_q{margin-right:10px;color:#00C;} #response_field{display:none;} .q2apro_captcha { margin-bottom:20px; } To avoid this verification in future, please log in or register.

## 1 Answer

0 votes

A moving-coil permanent-magnet instrument can be used as ammeter by using a low resistance shunt.

## Related questions

1 answer 123 views
1 answer 13 views

Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

2 answers 13 views

Permanent magnet moving coil instruments are used for

1 answer 27 views

When the voltage across a battery is measured using a D.C potentiometer, the reading shows 1.08 V. But when the same voltage is measured using a Permanent Magnet Moving Coil (PMMC) voltmeter, the voltmeter reading shows 0.99 V. If the resistance of the voltmeter is 1100 Ohm , the internal resistance of the battery, in Ohm , is (A) 150 (B) 100 (C) 50 (D) 200

1 answer 14 views
1 answer 198 views

Eddy current damping cannot be used for moving iron instrument because

1 answer 7 views

What is permanent magnet and electromagnet?

1 answer 14 views

A neodymium magnet is a permanent magnet made from an alloy of _________ A) Neodymium and iron B) Neodymium, iron and iodine C) Neodymium and boron D) Neodymium, iron and boron

1 answer 17 views

A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω

1 answer 18 views

A moving coil meter has a resistance of 3 Ω and gives full scale deflection with 30 mA. To measure voltage up to 300 V, the external resistance to be connected in series with the instrument is (A) 9997 Ω (B) 10000 Ω (C) 997 Ω (D) 10003 Ω

1 answer 27 views

A moving coil of meter has 100 turns, and a length and depth of 10mm and 20mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carrier current capacity is 50 mA. The torque on the coil is

1 answer 19 views

State the material used for moving coil and former for PMMC instruments.

1 answer 18 views

The self inductance of a coil can be measured using (A) Wien’s Bridge (B) Schering Bridge (C) Anderson’s Bridge (D) Wheatstone Bridge

1 answer 21 views

A permanent magnet moving coil ammeter has a coil resistance of 99 ohm and Full Scale Deflection (FSD) current of 0.1mA. Shunt resistance is 1 ohm. Current through the meter at 0.5 F.S.D is:

1 answer 78 views
1 answer 23 views

The inductance of a coil can be increased by?

1 answer 33 views
1 answer 18 views
1 answer 21 views
0 answers 12 views

Two voltmeters of same range, one moving iron type and other permanent magnet moving coil type, are connected in parallel for measuring a.c. supply voltage. If the reading of MI type is 300V, the reading of PMMC type will be (a) zero (b) higher-than M.I. type (c) lower than M.I. type (d) same

1 answer 58 views

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be  (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

1 answer 25 views
1 answer 22 views
0 answers 11 views

Series resistance required to read 0-250 V with a moving coil instrument of internal resistance 2 ohm and full scale deflection of 50 mA is (a) 49998 Ω (b) 4998 Ω (c) 498 Ω (d) 49.8 Ω

1 answer 25 views

A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA. To measure current upto 100 A, we will have to connect • 10 W resistance in series • 10 W resistance in parallel • 10/1999 W resistance in series • 10/1999 W resistance in parallel

1 answer 16 views
1 answer 111 views
0 answers 25 views

What is the definition of a primary instrument?

1 answer 27 views
1 answer 10 views
1 answer 14 views

The main sources of Errors in Permanent Magnet moving Coil (PMMC) are due to : - a) weaking of the permanent magnet due to aging at temperature effects b) weaking of spring due to aging and temperature effects c) change of resistance of the moving coil with temperature d) all the above

1 answer 47 views

The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%

1 answer 14 views
1 answer 10 views

A keyword can be used as an identifier by using the  A) prefix # B) prefix @ C) prefix \$ D) prefix x

1 answer 18 views
1 answer 14 views

A Pyrheliometer is an instrument to measure :  (A) temperature of solar photovoltaic cell  (B) intensity of direct solar radiation at normal incidence  (C) intensity of indirect solar radiation  (D) efficiency of a solar photovoltaic cell

1 answer 26 views

In a PMMC instrument, the damping provided is :  (A) air damping (C) eddy current damping (B) fluid damping (D) magnetic damping using a magnet

1 answer 20 views

Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type wattmeter (C) Moving-iron voltmeter (D) Moving-iron wattmeter

1 answer 15 views
1 answer 15 views
1 answer 6 views

State the advantages of instrument transformer in using for extension of range of meters.

1 answer 38 views

What is the difference between a coil and an inductor?

1 answer 22 views

Hard steel is suitable for making permanent magnets because?

1 answer 279 views

Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.

1 answer 29 views

Permanent magnets are normally made of?

1 answer 20 views
0 answers 54 views

A moving coli ammeter has a fixed shunt of 0.02 Ω with a coil circuit resistance of R=1 kΩ and needs potential of 0.5 V across it for full scale deflection. Calculate the value of shunt to give full scale deflection when the total current is 10 A. (1) 0.05 Ω (2) 0.005 Ω (3) 0.5 Ω (4) 0.0005 Ω

1 answer 21 views

Peterson coil is used for :  (A) shunt compensation of lines (B) grounding of system neutral (B) reduce fault currents (D) connecting interconnected systems

1 answer 14 views

A moving coil instrument of resistance 5 Ohm requires a potential difference of 75 mV to give a full scale deflection. The value of shunt resistance needed to give a full scale deflection at 30 A is

1 answer 18 views