MCQ
4321. A moving iron ammeter may be compensated for frequency errors by-
A shunt resistance
Shunt capacitance
A series inductance
Series resistance
4322. In a moving iron meter, the deflecting torque is proportional to--
Current through the coil
Square of the current through the coil
Sine of the measurand
Square root of the measurand
4323. The two pressure coils of a single phase power factor meter have---
The same dimensions and the same number of turns
The same dimension but different number of turns
The same number of turns but different dimensions
None of the above
4324. An ohmmeter is a---
Moving iron instrument
Moving coil instrument
Dynamometer instrument
None of the above
4325. The absolute measurement of resistance is done by-
Ohm's law method
Bridge method
Rayleigh method
Lorenz method
4326. In order to achieve high accuracy, the slide wire of a potentiometer should be-
As long as possible
As short as possible
Neither too small nor too large
Very thick
4327. The resistance can be measured most accurately by-
Voltmeter-ammeter method
Bridge method
Multimeter
Megger
4328. A direct current can be measured by-
AD.C. potentiometer directly
A D.C. potentiometer in conjunction with a standard resistance
A D.C. potentiometer in conjunction with a volt ratio box
None of the above
4329. The multiplier and the meter coil in a voltmeter are in-
Series
Parallel
Series-parallel
None of the above
4330. In a portable instrument, the controlling torque is provided by--
Spring
Eddy currents
Gravity
All of the above
4331. Resistances can be measured with the help of-
Watt-meters
Voltmeters
Ammeters
Ohmmeters and resistance bridges
4332. To measure the flux, devices used are based on-
Voltaic effect
Hall effect
Piezo-clectric effect
Photo-voltaic effect
4333. A dynamometer wattmeter can be used for-
DC only
AC only
Both DC and AC
Any of the above
4334. An instrument transformer is used to extend the range of-
Induction instrument
Electrostatic instrument
Moving coil instrument
Any of the above
4335. No eddy current and hysteresis losses occur in-
Electrostatic instruments
PMMC instruments
Moving iron instruments
Electrodynamo meter instruments
4336. If the cross-sectional area of a magnetic field increases, but the flux remains—
the same,
the increases
decreases
none
Himalay Sen Sir
ইলেক্ট্রিক্যাল ডিপার্টমেন্ট Mcq
EEE MCQ
Electrical Department all question
ইলেক্ট্রিক্যাল মেজারমেন্ট MCQ
Electrical Measurement All MCQ
ব্যাখ্যা: ব্যাখ্যা: We know, B A If area is increases flux density will be decreases because they are inversely proportional to each other.
4337. Most sensitive galvanometer is-
Elastic galvanometer
Vibration galvanometer
Duddlb galvanometer
Spot ballistic galvanometer
4338. The spring material used in a spring control device should have the following property---
Should be non-magnetic
Most be of low temperature coefficient
Should have low specific resistance
All of the above
4339. A megger is usually-
Moving iron type instrument
Electro-static type instrument
Hot-wire type instrument
Moving coil type instrument
4340. An ohmmeter is an instrument for measuring-
current
resistance
voltage
wattage