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8. Read the statements and choose the correct option.
1. Wire wound resistors are used for high current applications.
2. Carbon composition resistors are used for small power applications.
A) 1 and 2 are correct B) 1 correct and 2 is wrong
C) 1 wrong and 2 is correct D) 1 and 2 are wrong

9. The function of flux in soldering is

A) Reduce temperature of soldering process
B) To keep the metal surface clean and oxide free
C) Reduce melting point of solder
D) To reduce the time of soldering process

10. Identify the effect of aluminium impurity in tin-lead solder from the following.
A) Reduces the flow of solder
B) Wetting decreases significantly

C) Final melting point of solder increases

D) Surface deterioration of molten solder

11. From the given statements which are related to para magnetic materials ?
|, The substance are weakly magnetized when placed in an external magnetic
field.
ll. The substances move from weak field region to strong field region in a
non-uniform magnetic field.

Ill. Magnetic susceptibility is negative.
IV. Relative permeability is less than one.
A) | and Il only B) l only 0) ‏,ا‎ ١١ ೩೧೮ 1 ೦೧॥/ . 0) I, Il, Ill and IV

12. From the following properties identify the type of magnetic material.
|. A magnetic material with susceptibility is low and negative.
॥. They tend to move from high field region to low field region under the influence
of non-uniform magnetic field.
A) Para magnetic material B) Ferro magnetic material
C) Ferri magnetic material D) Diamagnetic material

13. When aconductor is moved to south direction in a magnetic field which is directed
upwards. Then the direction of current in the conductor will be

A) Towards east B) Towards west
C) Towards downward D) Towards north