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Q.43:- An instruction used to set the carry Flag in a computer can be classified as

(a) Data transfer(b) arithmetic(c) logical(d) Program control

Q.44:- ‘Figure of Merit’ is used to

(a)

compare the efficiency of the thermoelectric materials

(b)

measure the extent of doping of intrinsic  semiconductors

(c)

compare the extent of purity of semi-conductor materials

(d)

None of the above.

Q.45:- A certain photoconductive cell is known to have a critical wave-length of 0.5 micrometer. Then the minimum energy required to move an electron from the valence band to the conduction band is:

(a) 0.96 electric volt(b) 0.31 electron volt(c) 0.62 electric volt(d) 2.48 electron volts

Q.46:- A 50 Hz operation, a single-phase transformer has hysteresis loss of 200 W and eddy current loss of 100 W. Its core loss at 60 Hz operation will be

(a) 432 W(b) 408 W(c) 384 W (d) 360 W

Q.47:- Cogging and crawling are phenomena associated with

(a)

cage induction machines and they are essentially the same

(b)

squirrel cage induction machine, the former at a fraction of its rated speed and the latter during starting

(c)

squirrel cage induction machine, the former during starting and the latter at a fraction of its rated speed

(d)

Wound rotor induction machines and they are reduced by skewing, chording and distribution of windings.

Q.48:- Match List-1 (type of single-phase motor) with List-2 (type of appliance) and select the correct answer using the codes given below the lists:

List-1List-2

A. Permanent magnet type1.Rocket

B. Shaded pole2. Refrigerator compressor

C. Universal 3. Sewing machine

D. Capacitor shunt, capacitor run induction motor4. Photocopying machine

Codes:

(a)

ABCD

1234

(b)

ABCD

1243

       (c)  ABCD

4132

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