12th Physics unit 13 current electricity MCQs from past papers of Inter Boards. Answer keys are provided with these MCQs. Inter part 2 Lahore Board Past papers MCQs. Inter part 2 Faisalabad Board past papers MCQs.
12th Physics Unit 13 Current Electricity MCQs:
SAMPLE MCQS FROM UNIT 13 2ND YEAR PHYSICS
A wire of uniform area of cross-section A, length L and resistance R is cut into two equal
parts. The resistivity of each part.
(D) is oine-fourth
B) remains the same
(C) is halved
(A) is doubled
The unit of temperature co-efficieot of resistivity is. (DGK. GI, 2014) (DGK. GII, 2016MAJK. GI, 2015)
(Β) Ωιη
(D) K
The reciprocal of resistance is called: (DGK. GII, 2015) (SGD. GI, 2018)
(A) Capacitance
(B) Resistance
© Conductance
(D) Inductance
ohm.m’ is the Unit of: (BWP. GI, 2014) (LFIR. GI, 2018)
(A) Resistance
(B) Resistivity
(C) Conductance
D) Conductivity
The specific resistance of a material depends upon (LHR. GI, 2015)
(A) Length
(B) Area
(C) Temperature
D) Both A&B
2nd Year Physics Current Electricity MCQs
Good conductors have conductivities of the order of: (FBD. GI, 2014) (SGD. GII, 2016)
(A) 10-12m-
B’ 10’Sm’
(C) 102 sm-
(D) 10-22m-
The SI Unit of resistivity is: (SWL. GI, 2014)
(Β) Ωm-
(C) Ωm
(D) 2
When a wire of resistance R is cut in two equal parts its resistance becomes R2 what
happens to resistivity: (MLN. GI, 2014)
(A) Double
(B) Same
(C) Half
(D) One fourth
Which one has negative temperature co-efficient of resistance? (GRW. GI, 2016)
(A) Silver
(B) Gold
(C) Carbon
(D) Steal
Temperature coefficient of resistance (oC) is equal: (SGD. GI, 2016)
(A) R, +R
(B) R.AT
R.Δε
(D) None of these
A rheostat can operate as: (RWP. GII, 2017)
(A) Amplifier
(B) Potential divider
(C) Oscillator
(D) Transformer
Heat sensitive resistors are called: (FBD. GI, 2017)
(A) Resistors
(B) Capacitor
(C) Thermistors
(D) Inductors
Colour codes are used to calculate the: (LHR. GI, 2014)
(A) Nature of resistor
(B) Numerical value of resistance
(C) potential difference
(D) Current
Resistivity at a given temperature depends upon: (LHR. GII, 2014)
(A) Area of cross section
(B) length
(C) Nature of material of conductor
(D) Both length and Area
A substance having the negative temperature coefficient of resistivity out of the following is:
(LHR. GI, 2015) (BWP. GII, 2017)
A) Carbon
(B) Iron
(D) Gold
Resistance tolerance for gold colour is: (MLN. GII, 2016) (LHR. GII, 2018)
(A) 50%
(B) 30%
(C). 20%
(D) 5%
If the fourth band is missing on resistance, its tolerance is: (SWL. GI, 2016)
(A) +5%
(B) +10%
(C) +15%
(D) +20%