CURRENT ELECTRICITY PART 9

CURRENT ELECTRICITY PART 9

81. With rise in temperature conductance of semiconductor is

A.Increases

B.Decreases

C.Remains same

D.none of the above

82.If the power rating of the machine is exceeded then what happens??

A.machine will be damaged

B.machine will be burnt

C.both a & b

D.none of the above

83. In general which  bulb gives more light 100 watt bulb or 60 watt bulb ?

A.100 watt bulb

B.60 watt bulb

C.both a & b

D.none of these

84. What is the formula of non-ohmic conductors ?

A.V=IR

B. V=I/R

C. P=VI

D.none of these

85. The electron in last orbit of an atom are called

A.free electrons

B. Bound electrons

C.Valance electrons

D. Thermionic electrons

86. If there are b  branches and n nodes  the number of equations will be

A. N-1

B. B-1

C. B-N

D.B-N+1

87.If an circuit with 25 branches  and 15 nodes then loop equation is

A. 11

B.10

C. 40.

D.15

88.Which material is the best for making connecting wires ?

A.manganin

B.constantan

C.copper

D.nichrome

 

89. When flux linking with any coil  or circuit changes an  EMF is induced in the coil or circuit is called .........E.M.F

A. Dynamically induced emf

B.Statically induced emf

C.both a & b

D.none of these

90.A .......is a point in a circuit  two or more branches meet..

A. Junction

B. Node

C. Both a & b

D.none

ANSWERS:-  81.A  82.C. 83.A  84.A 85.C 86.D  87. A. 88.C 89.A 90.C

To be continued.....best of luck