# 12th Class Physics MCQS Chapter 2

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The unit of resistance is:
?
?-1m-1
?m-1
?m

The algebraic sum of potential change in a closed circuit is zero.
Kirchhoff 2nd rule
Krichoff’s 3rd rule
Kirchhoff 4th  rule
Kirchhoff’s 1st rule

The fraction change in resistance per Kelvin is known as:
Thermal  expansion
All of the above
Coefficient of voltage of change
Temperature coefficient of Resistance

During electrolysis process, density of CuSO4 solution
None of these
Increased
Remains constant
Decreased

The color code of “Green”
7
3
5
8

The conventional current is due to the flow of
Negative charge
Positive charge
Bot (b) and (c)
Atoms and molecules

The drift velocity is of order:
103 m/s
10-3m/s
10-4m/s
10-13m/s

The value of maximum output power is?
E/4R
Non of above
E2/4R
E/4R2

The resistivity of ——————–decrease with the increase in temp
Silver
Silicon
Gold
Copper

Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?
2R /3?
2R /4?
3 R?
R/3?

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