# FSC Physics MCQs Chapter 17 Class 12

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Physics Ch 17 Class 12 Physics of Solids

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Which of the following statements is correct:

UHS 2011
Physics
Physics of Solids
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The process of adding controlled impurities to a semiconductor is known as _______. The amount of impurity added to an intrinsic (pure) semiconductor varies its level of conductivity.

NTS 2018
Physics
Physics of Solids
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Dimension of modulus of elasticity:

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Which type of current passes through extrinsic semiconductors diode?

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Let L be the length and d be the diameter of the cross section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases the extension of wire will be the maximum?

NUMS 2019 Cancelled
Physics
Physics of Solids
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If a substance can undergo plastic deformation, until it breaks, it is:

NUMS 2016
Physics
Physics of Solids
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Electric conduction is high in:

NUMS 2016
Physics
Physics of Solids
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One of the following is a photoconductor :

PMC Practice 20
Physics
Physics of Solids
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The ratio of tensile strength to tensile strain is called:

UHS 2012
Physics
Physics of Solids
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If stress is applied on a body then the ratio of change in volume to original volume will be:

NUMS 2016
Physics
Physics of Solids
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If stress is doubled, then volume becomes

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Which of the following can have negative temperature coefficient?

PMC Practice 4
Physics
Physics of Solids
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In the case of linear deformation, the ratio of tensile stress to tensile strain is called:

UHS 2018
Physics
Physics of Solids
Oscillations and Simple Harmonic Motion
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The product of dimensions of Young’s modulus and stress are:

NUMS 2017
Physics
Physics of Solids
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To determine Young’s modulus of a material of a given wire of length ? we use:

ETEA 2018
Physics
Physics of Solids
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Young modulus for the perfectly rigid body is

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A wire is stretched by a force ‘F’ which causes an extension ∆l, the energy stored in the wire is:

UHS 2012
Physics
Physics of Solids
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Pascal is equal to:

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The volume of a gas at constant pressure increases by 2% when the temperature is increased by 5 K, It’s initial temperature is:

NUMS 2016
Physics
Physics of Solids
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When an applied stress changes the volume, the change in volume per unit volume is known as:

NUMS 2018
Physics
Physics of Solids
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When a fluid is incompressible, it means:

FMDC 2018
Physics
Physics of Solids
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A wire of area of cross section ‘A’ and original length ‘l’ is subjected to a load
‘L’. A second wire of the same material with an area is ‘2A’ and length ‘2l’ is
subjected to the same load ‘L’. If the extension in the first wire is ‘X’ and the second
wire is ‘Y’, find the ratio ‘X/Y’.

UHS 2015
Physics
Physics of Solids
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Hooke’s law states that under normal conditions:

NUMS 2019 Cancelled
Physics
Physics of Solids
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A 4.0 m long wire is subjected to stretching force and its length increases by 40 cm. The percent elongation which the wire undergoes is:

UHS 2013
Physics
Physics of Solids
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25 / 35

Aluminum Is a

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In an extrinsic semi-conductor charge carriers are

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The young’s modulus of a given rod of uniform length ? is given by the relation:

ETEA 2018
Physics
Physics of Solids
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28 / 35

Let L be the length and d be the diameter of the cross section of a wire. Wires of the same material with different L and d are subjected to the same tension along the length of the wire. In which of the following cases the extension of wire will be the maximum?

NUMS 2014
Physics
Physics of Solids
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29 / 35

Semiconductors have conductivity of the order

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To convert the Si crystal into a P. type semi-conductor, which group element be Doped?

NUMS 2016
Physics
Physics of Solids
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A wire is stretched by a force which causes an extension. The energy is stored in it only when:

UHS 2011
Physics
Physics of Solids
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Strain energy in a deformed energy is stored in the form of:

UHS 2015
Physics
Physics of Solids
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Negative strain indicates that

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The stress-strain graph, deduced the following limits successively:

UHS 2013
Physics
Physics of Solids
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When an applied stress changes the volume, the change in volume per unit volume is known as:

FMDC 2018
Physics
Physics of Solids
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The average score is 59%

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