Login
Login
Register
Questions
Unanswered
Tags
Categories
Ask a Question
Ask a Question
Recent questions tagged electrical instruments
+3
votes
1
answer
The torque of an ammeter varies as the square of the current through it. If a current of 5 A produces a deflection of 90,
asked
Mar 26, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
A 250-V, 10-A dynamometer type watt meter has resistance of current and potential coils of 0.5 and 12,500 ohms respectively.
asked
Mar 25, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
A meter, whose constant is 600 revolutions per kWh, makes five revolution in 20 seconds. Calculate the load in kW.
asked
Mar 14, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+3
votes
1
answer
An energy meter is designed to make 100 revolution of the disc for one unit of energy.
asked
Mar 3, 2019
in
Mathematics
by
kratos
electrical instruments
measurements
+1
vote
1
answer
The inductive reactance of the pressure-coil circuit of a dynamometer watt meter is 0.4 % of its resistance
asked
Feb 17, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
The meter that is suitable for only direct current measurements is : (a) moving-iron type
asked
Feb 11, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+3
votes
1
answer
Find the least count of a milliammeter in which there are 20 divisions between 400 mA and 500 mA marks.
asked
Feb 8, 2019
in
JEE
by
kratos
current laws
measurements
electrical instruments
cbse
electricity
jee
class-10
jee mains
current electricity
+2
votes
1
answer
The most efficient form of damping employed in electrical instruments is-
asked
Feb 8, 2019
in
Mathematics
by
kratos
bsnl
measurements
electrical instruments
+1
vote
1
answer
The spring constant of a 10-A dynamometer watt meter is 10.5 × 10^− 6 N-m per radian.
asked
Feb 7, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
A moving-coil milli voltmeter has a resistance of 20Ω and full-scale deflection of 120 is reached
asked
Feb 3, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+2
votes
1
answer
Permanent-magnet moving-coil ammetere have uniform scales because : (a) of eddy current damping
asked
Jan 6, 2019
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
The graph which represents the relation between the total resistance R of a multi range moving coil voltmeter and its full scale
asked
Dec 30, 2018
in
JEE
by
kratos
measurements
electrical instruments
jee
jee mains
class-12
current electricity
+3
votes
1
answer
A moving coil galvanometer has resistance 50Ω and it indicates full deflection at 4mA current. A voltmeter
asked
Dec 26, 2018
in
JEE
by
kratos
measurements
electrical instruments
electric current
jee
jee mains 2019
jee mains
class-12
+2
votes
1
answer
Show that the torque produced in a permanent-magnet moving-coil instrument is proportional to the area of the moving coil.
asked
Dec 14, 2018
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
The inductance of attraction type instrument is given by L = (10 + 5θ − θ^2)μH
asked
Dec 9, 2018
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
A 50-A, 230-V energy meter is a full-load test makes 61 revolutions in 37 seconds
asked
Nov 27, 2018
in
Mathematics
by
kratos
measurements
electrical instruments
+3
votes
1
answer
A basic 1’ Arsonval movement with internal resistance Rm = 100 Ω
asked
Nov 18, 2018
in
Mathematics
by
kratos
measurements
electrical instruments
+2
votes
1
answer
A single-phase energy meter of the induction type is rated 230-V; 10-A, 50- Hz and has a meter constant of 600 rev/kWh when correctly adjusted.
asked
Nov 13, 2018
in
Mathematics
by
kratos
measurements
electrical instruments
+1
vote
1
answer
If two meters X and Y require 40 mA and 50 mA respectively to give full scale deflection, then
asked
Nov 10, 2018
in
Class 12
by
kratos
isc
measurements
electrical instruments
icse
kcet
class-12
+3
votes
1
answer
Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μA current.
asked
Oct 27, 2018
in
Class 12
by
kratos
neet
measurements
electrical instruments
electric current
aiims
jee
moving charges and magnetism
jee mains
class-12
To see more, click for the
full list of questions
or
popular tags
.