The thermocouple instruments do not have High sensitivity High degree of measuring accuracy Independence of ambient temperature Absence of frequency error TRUE ANSWER : ? YOUR ANSWER : ?
Which wave has the least form factor? Sine wave Square wave Rectangular wave Triangular wave TRUE ANSWER : ? YOUR ANSWER : ?
When the pointer of an indicating instrument comes to rest in the final deflected position, ______ None of the listed here Both deflecting and controlling torques act Only controlling torque acts Only deflecting torque acts TRUE ANSWER : ? YOUR ANSWER : ?
A Manganin swap resistance is connected in series with a moving coil ammeter consisting of a milli ammeter and a suitable shunt in order to Obtaine large deflecting torque. Minimize the effect of stray magnetic fields. Minimize the effect of temperature variation. Reduce the size of the meter. TRUE ANSWER : ? YOUR ANSWER : ?
A sinusoidal signal waveform, when observed on an oscilloscope, has a peak to peak amplitude of 6 cm. If the vertical sensitivity setting is 5 v/cm, then rms value of the voltage will be 15 V. 12.6 V. 10.6 V. 11.1 V. TRUE ANSWER : ? YOUR ANSWER : ?
An ammeter of range 0-25 A has a guaranteed accuracy of 1% of full-scale reading. The current measured by the ammeter is 5 A. The limiting error in the reading is 3% 4% 6% 5% TRUE ANSWER : ? YOUR ANSWER : ?
What is the expression for momentum? mass × velocity force × displacement change of velocity / time mass × acceleration TRUE ANSWER : ? YOUR ANSWER : ?
A moving iron ammeter produces a full scale torque of 240 μNm with a deflection of 120° at a current of 10 A. The rate of change of self induction (μH/radian) of the instrument at full scale is 114.6 μH/radian. 12.0 μH/radian. 2.0 μH/radian. 4.8 μH/radian. TRUE ANSWER : ? YOUR ANSWER : ?
The resistance offered to the passage of an in-varying current by a column of mercury at the temperature of melting ice of mass 14.4521 gms of uniform cross-sectional area and length 106.3cm is One ohm according to SI units One ohm according to working standards Standard ohm One international ohm TRUE ANSWER : ? YOUR ANSWER : ?
A voltmeter has 100 scale divisions and can measure up to 100 V. Each division can be read to ½ division. The resolution of the voltmeter is 1.5 V 2 V 0.5 V 1 V TRUE ANSWER : ? YOUR ANSWER : ?