79.

80.

81.

82.

83.

84.

85.

86.

The tridal power plant turbine usually employed in :
(A) Reaction type (B) Reversible type
(C) Propeller type (D) Simple impulse type

116 back e.m.f. of a DC motor depends on the :
(A) 0016 flux (8) shape of the conductor
(C) type of commutator (D) brush material

The closeness of the measured value of a quantity, by an instrument, to its true value is
known as:
(A) Error (B) Accuracy

(C) Resolution (D) Precision

The basic movement in a permanent magnet moving coil instrument is called as:
(A) Faraday movement ൯) Lenz’s movement
(0) d’Arsonval movement (09) d’Alexandre movement

Consider a coil having an area of ‘A’ and with ‘N’ number of turns be placed between the
poles of a permanent magnet. Let ‘T be the current flowing in the coil producing a magnetic
flux density of 13. Then the resulting deflecting torque ‘Ta’ exerted on the coil
will be :

(A) Ta=NBAI ൫ Ta=(NBD/A
(© ‏دوہ‎ ۳۸ (0) ஈட]

Constant uniform deviation of operation of an instrument due to the instrument itself,
observation of the observer or environmental conditions, resulting in errors when taking a
measurement is called :

(A) Gross errors (B) Random errors
(C) Absolute errors (D) Systematic errors

The opposing force that brings the pointer in an indicating instrument to its final deflected

position by avoiding oscillations is :
(A) Deflecting torque (B) Damping torque
(C) Controlling torque (0) Indicating torque

A transformer 15 a static device that is used to :
@ convert voltage to a higher (step-up) or lower (step down) level
(1) convert current to a higher (step-up) or lower (step down) level
(014) convert frequency to a higher (step-up) or lower (step down) level
(A) _ both 0) and (ii) ൯ _ both 0) and (iii)
(C) both (ii) and (iii) (D) all 6), (0 and (iii)

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