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Physics Fsc Part 1 Chapter 9 Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | Wheatstone bridge is used to measrue the unknown. |
<p>Resistance</p> <p>Current</p> <p>Voltage</p> <p>None</p> |
| 2 | In wheatstone bridge all the four arms have equal resistanc eR. If the resistance of galvanometer arm is also R the equivalent resistance of the combination |
<p>R</p> <p>R/4</p> <p>R/2</p> <p>2R</p> |
| 3 | Maximum power is delivered to a load when internal resistance of soruce is. |
<p>Less than load</p> <p>Equal the load resistance</p> <p>Greater than the load resistance</p> <p>Does not depend on load resistance</p> |
| 4 | Electric bulb does not obey Ohm's law becasue |
<p>Temperature changes</p> <p>Resistance changes</p> <p>Heat is prodcued</p> <p>All</p> |
| 5 | Ohm's law can be expressed as. |
<p>I = VR</p> <p>R = IV</p> <p>V = RI</p> <p>V = I/R</p> |
| 6 | Internal resistanc and e.m.f of a cell can be determined by an instrument. |
<p>CRO</p> <p>AVO Meter</p> <p>Botha CRO and AVO meter</p> <p>Potentiometer</p> |
| 7 | The best instrument used for teh acccurate measurement of e.m.g. of a cell is. |
<p>potentiometer</p> <p>Wheatstone bridge</p> <p>Ammeter</p> <p>Voltmeter</p> |
| 8 | A potentiometer can be used as to. |
<p>Determine E.M.F. of a cell</p> <p>Campare e.em.f s.</p> <p>measrue accurate value of current</p> <p>All of above</p> |
| 9 | The SI unit of conductance is. |
<p>mho -meter</p> <p>ohm</p> <p>mho</p> <p>moh meter</p> |
| 10 | mho m-1 is the SI unit of. |
<p>Conductance</p> <p>Conductivity</p> <p>Resistance</p> <p>Resistivity</p> |
| 11 | If the source of e.m.f. is traversed from negative to positive terminal, the potential change is. |
<p>Positive</p> <p>Negative</p> <p>Zero</p> <p>Constant</p> |
| 12 | If a resistor is traversed in the direction of current, the potential change is. |
<p>Negative</p> <p>Positive</p> <p>Zero</p> <p>Infinite</p> |
| 13 | Algebraic sum of current meeting at a point is zero is a statement of. |
<p>Kirchhoff's 1st law</p> <p>Faraday's law</p> <p>Ampere's law</p> <p>None</p> |
| 14 | The Kirchhoff's 2nd rule is the manifestation of law of conservation of. |
<p>Energy</p> <p>Mass</p> <p>Momentum</p> <p>Charge</p> |
| 15 | The Kirchhoff's first rule is the manifestation of law of conservation of. |
<p>Mass</p> <p>Charge</p> <p>Momentum</p> <p>Energy</p> |
| 16 | The sum of currents in various resistors meeting at a point of the circuit. |
<p>Equals to the total current</p> <p>Exceed the totla current</p> <p>Less than total current</p> <p>None of above</p> |
| 17 | The reciprocal of resistance is known as . |
<p>Conductance</p> <p>Reactance</p> <p>Conductivity</p> <p>Resistivity</p> |
