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Physics Fsc Part 1 Full Book Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | When adding or subtracting physical quantities, the absolute uncertainty in the final result is found by: | Multiplying the individual absolute uncertainties. Adding the individual absolute uncertainties. Taking the average of the individual absolute uncertainties. Subtracting the smallest from the largest individual absolute uncertainty. |
| 2 | The dimensions of momentum are: | [MLT⁻¹] [ML²T⁻²] [MLT⁻²] [ML²T⁻¹] |
| 3 | How many significant figures are in the measurement 0.004500 kg? | 3 4 5 6 |
| 4 | The prefix 'nano' represents a factor of: | 10⁻⁶ 10⁻⁹ 10⁻¹² 10⁻³ |
| 5 | Which of the following is the SI base unit for luminous intensity? | Ampere Candela Mole Kelvin |
| 6 | The most ractive metals of the periodic table are. |
<p>Alkali metals</p> <p>Alkaline metals</p> <p>Rare earth metals</p> <p>Coinage metals</p> |
| 7 | A photon is particle of light. What is its mass when it moves with 0.9 C? |
<p>9.1 x 10<sup>-31</sup> kg</p> <p>1.67 x 10<sup>-19</sup> kg</p> <p>1.67 x 10<sup>-27</sup> kg</p> <p>Zeri</p> |
| 8 | it the rest mass of a particle mo increased to m due to its high speed then its kinetic energy is. |
<p>( m - mo ) c<sup>2</sup></p> <p>1/2 mv2</p> <p>1/2 mc<sup>2</sup></p> <p>1/2 (m -m<sub>o</sub>0</p> |
| 9 | If a space craft of rest legnth 'lo' is movng with a speed equal to speed of light, then its relativstic legnth l , will be |
<p>l = l<sub>o</sub></p> <p>l = l<sub>o</sub>/2</p> <p>l = 0</p> <p>All of these</p> |
| 10 | The length of rod at rest as measurd by an observer moving parallel to it with relativistic speed is given by |
<p>l = l<sub>o</sub> [1 - V2/C2]</p> <p>l = l<sub>0</sub> 1 -V2/C2</p> <p>l = l<sub>o</sub> / 1- V<sup>2</sup>C<sup>2</sup></p> <p>l0 = l 1- V<sup>2</sup>/C<sup>2</sup></p> |
| 11 | The mathematical representation of Malus's law is. |
<p>I =I<sub>o</sub> Cos 2 <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ</m:r></span></i></m:omath></m:omathpara></span></span></span></p> <p>I = I <sub>o </sub>Sin <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ</m:r></span></i></m:omath></m:omathpara></span></span></span></p> <p>I = I<sub>o </sub>Tan2 <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ</m:r></span></i></m:omath></m:omathpara></span></span></span></p> <p>I = I<sub>o</sub> Cot 2 <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ</m:r></span></i></m:omath></m:omathpara></span></span></span></p> |
| 12 | Which one of the folloiwng is/are correct. |
<p>Work is positive if 0< 90<sup>o</sup></p> <p>Work is 0 if <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ 90<sup>o</sup></m:r></span></i></m:omath></m:omathpara></span></span></span></p> <p>Work is negative if <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><i><span style="font-family:"Cambria Math",serif"><m:r>θ 90<sup>o</sup></m:r></span></i></m:omath></m:omathpara></span></span></span></p> <p>All of these</p> |
| 13 | The dimension of power |
<p>[ML2 T-3]</p> <p>[ML-1T-1]</p> <p>[ML2T2]</p> <p>[ML-2T-4]</p> |
| 14 | Absolute P.E. of a body of mass"m" at a distance"r" from earth centre is. |
<p>[-GM/r]</p> <p>- Gr/ M</p> <p>-Gmr</p> <p>GmM /r</p> |
| 15 | 1 kilowatt is equal = |
<p>1000 J /s</p> <p>106 watt</p> <p>0.1 x 10<sup>3</sup> Watt</p> <p>6.25 x 10 <sup>25 Watt</sup></p> |
| 16 | If P = pressure, Deltat V = change in volume, P Delta V represents |
<p>Work</p> <p>Density</p> <p>Power</p> <p>Temperature</p> |
| 17 | The kinetic energy acquired by a distance from rest under eh action of a constant fore is directly proportinal to. |
<p style="margin-bottom:11px"><span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><m:rad><m:radpr><m:deghide m:val="on"><span style="font-family:"Cambria Math",serif"><span style="font-style:italic"><m:ctrlpr></m:ctrlpr></span></span></m:deghide></m:radpr><m:deg></m:deg><m:e><i><span style="font-family:"Cambria Math",serif"><m:r>m1</m:r></span></i></m:e></m:rad></m:omath></m:omathpara></span></span></span></p> <p style="margin-bottom:11px"><span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><m:omathpara><m:omath><m:rad><m:radpr><span style="font-family:"Cambria Math",serif"><span style="font-style:italic"><m:ctrlpr></m:ctrlpr></span></span></m:radpr><m:deg><i><span style="font-family:"Cambria Math",serif"><m:r>1</m:r></span></i></m:deg><m:e><m:rad><m:radpr><m:deghide m:val="on"><span style="font-family:"Cambria Math",serif"><span style="font-style:italic"><m:ctrlpr></m:ctrlpr></span></span></m:deghide></m:radpr><m:deg></m:deg><m:e><i><span style="font-family:"Cambria Math",serif"><m:r>m</m:r></span></i></m:e></m:rad></m:e></m:rad></m:omath></m:omathpara></span></span></span></p> <p>m</p> <p>Independent of m</p> |
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