MCQOPTIONS
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MCQOPTIONS
This section includes 110 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The current inside a copper voltameter [Roorkee 1992] |
| A. | Is half the outside value |
| B. | Is the same as the outside value |
| C. | 4000 W |
| D. | Depends on the concentration of \[CuS{{O}_{4}}\] |
| Answer» C. 4000 W | |
| 102. |
A current I is passed for a time t through a number of voltameters. If m is the mass of a substance deposited on an electrode and z is its electrochemical equivalent, then [MP PMT 1997] |
| A. | \[\frac{zIt}{m}=\text{constant}\] |
| B. | \[\frac{z}{mIt}=\text{constant}\] |
| C. | 57 W |
| D. | \[\frac{It}{zm}=\text{constant}\] |
| Answer» B. \[\frac{z}{mIt}=\text{constant}\] | |
| 103. |
A certain charge liberates 0.8 gm of\[{{O}_{2}}\]. The same charge will liberate how many gm of silver [MP PET 1999] |
| A. | 108 gm |
| B. | 10.8 gm |
| C. | 4.0 V |
| D. | \[\frac{108}{0.8}gm\] |
| Answer» C. 4.0 V | |
| 104. |
Assertion : Through the same current flows through the line wires and the filament of the bulb but heat produced in the filament is much higher then that in line wires. Reason : The filament of bulbs is made of a material of high resistance and high melting point. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | Due to temperature effect |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 105. |
Assertion : Electric appliances with metallic body have three connections, whereas an electric bulb has a two pin connection. Reason : Three pin connections reduce heating of connecting wires. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | Negative |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» D. If the assertion and reason both are false. | |
| 106. |
Assertion : The connecting wires are made of copper. Reason : The electrical conductivity of copper is high. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[\frac{2}{5}A\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 107. |
Assertion : Electric appliances with metallic body; e.g. heaters, presses etc, have three pin connections, whereas an electric bulb has a two pin connection. [AIIMS 1996] Reason : Three pin connections reduce heating of connecting cables. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[{{R}_{2}}={{R}_{3}}\]and \[{{R}_{1}}=\frac{1}{4}{{R}_{2}}\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» D. If the assertion and reason both are false. | |
| 108. |
Assertion : Electric field outside the conducting wire which carries a constant current is zero. Reason : Net charge on conducting wire is zero. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[42.8\,\,mV\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 109. |
Assertion : In practical application, power rating of resistance is not important. Reason : Property of resistance remain same even at high temperature. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[(t-273)\,\,(a-2bt)\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» E. If assertion is false but reason is true. | |
| 110. |
Assertion : The resistivity of a semiconductor increases with temperature. Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures thereby increasing its resistivity [AIIMS 2003] |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[{{1275}^{o}}C\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» E. If assertion is false but reason is true. | |