48:

49.

50.

81.

88.

53.

54,

65.

56.

Speed variations of n squirrel cage Induction motor are essentially similar to those of :
(ಸ) DC Bhunt motor (B) DC Series motor
(C) Synchronous motor (D) Differential compound

The no-load ratio of a 50 Hz single phase transformer is 6000/250 V 1106 maximum flux in
the core is 0.06 Wb, What is the number of primary turns?

(A} 0 (0) 900
© 350 (1) 210

A 23/2300 V transformer takes no load current of 5 A at 0.25 power factor lagging. The core
1058 18 :

(ക 300.2 7 യ 1925W
(ப). 2876W (0) 2126W

The power taken by a 3-phase load is given by the expression :

() 31५1८०७४ (ए) ‏و0‎
‎യ 3V, 1, sing യ 3V, 1, sing
A semiconductor 18 formed by ———————— bonds.
(A} Covalent (೧) Electrovalent
(C) Co-Ordinate (D) None of the above

After firing an SCR, the gating pulse is removed. The current in the SCR will +
(ಗ) Remains the same (18) Immediately fall to zero
(0 Rise up (D) Rise a little and then fall to zero

The majority carriers in a semiconductor are produced by :
(ക Bound Electrons (18) Electron — Hole pairs
(C) Doping (D) None of the above

The leakage current in a crystal diode is due to :
(४) Junction Capacitance (B) Majority Carriers
(0) Minority and Majority Carriers (D) Minority Carriers

A series resistance is connected in the zener circuit :
(५) properly reverse bias the zener (B) protect the zener
(0 properly forward bias the zener (D) current amplifier

9 203/2014
[P.T.0.]