MCQOPTIONS
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MCQOPTIONS
This section includes 301 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following quantities remains constant in a |
| A. | Current |
| B. | Voltage |
| C. | Power |
| D. | None of these |
| Answer» D. None of these | |
| 102. |
Electric iron |
| A. | they do not oxidise at high temperatures |
| B. | they do not burn at high temperatures |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 103. |
Parameters of electricity |
| A. | Potential Difference of 220 V, Frequency of 50 hertz and Current Rating of 5 A / 15 A |
| B. | Potential Difference of 150 V, Frequency of 40 hertz and Current Rating of 10 A |
| C. | Potential Difference of 220 V, Frequency of 60 hertz and Current Rating of 15 A |
| D. | Potential Difference of 220 V, Frequency of 40 hertz and Current Rating of 5 A |
| Answer» B. Potential Difference of 150 V, Frequency of 40 hertz and Current Rating of 10 A | |
| 104. |
What should be the |
| A. | High melting point, high specific resistance |
| B. | Low melting point, low specific resistance |
| C. | High melting point, low specific resistance |
| D. | Low melting point, high specific resistance |
| Answer» E. | |
| 105. |
The heating element of an |
| A. | high specific resistance and high melting point |
| B. | high specific resistance and low melting point |
| C. | low specific resistance and low melting point |
| D. | low specific resistance and high melting point |
| Answer» B. high specific resistance and low melting point | |
| 106. |
The earth's magnetic field |
| A. | magnetic equator |
| B. | magnetic poles |
| C. | geographic north pole |
| D. | latitude 45 |
| Answer» B. magnetic poles | |
| 107. |
Transformer |
| A. | for converting AC into DC |
| B. | for converting DC into AC |
| C. | to step up DC voltages |
| D. | to step up or step down AC voltages |
| Answer» E. | |
| 108. |
Dynamo |
| A. | high voltage to low voltage |
| B. | low voltage to high voltage |
| C. | electrical energy to mechanical energy |
| D. | mechanical energy to electrical energy |
| Answer» E. | |
| 109. |
Why does one experience a |
| A. | The resistance of human body is very low |
| B. | The resistance of human body is very high |
| C. | The human body is sensitive to even feeble currents |
| D. | The human body is sensitive to large currents only |
| Answer» C. The human body is sensitive to even feeble currents | |
| 110. |
If a body is |
| A. | remains precisely constant |
| B. | increases slightly |
| C. | decreases slightly |
| D. | may increase slightly or may decrease slightly |
| Answer» E. | |
| 111. |
By inserting a |
| A. | Increase |
| B. | Decrease |
| C. | First increase then decrease |
| D. | Remains unchanged |
| Answer» B. Decrease | |
| 112. |
Which of the following is not the cause of |
| A. | Low drifts velocity of ions |
| B. | High resistance offered by the solution of the motion of ions |
| C. | Low number of density of charge carriers |
| D. | Ionisation of salt |
| Answer» E. | |
| 113. |
What is the source of electrical energy in an |
| A. | Solar cell |
| B. | Mine nuclear reactor |
| C. | Dynamo |
| D. | Thermopile |
| Answer» B. Mine nuclear reactor | |
| 114. |
What type of |
| A. | Infrared |
| B. | Ultraviolet |
| C. | Visible |
| D. | None of these |
| Answer» B. Ultraviolet | |
| 115. |
Tube light |
| A. | Sodium vapour |
| B. | argon gas at low pressure |
| C. | mercury vapour at low pressure |
| D. | mercuric oxide and argon gas |
| Answer» E. | |
| 116. |
An example of a |
| A. | Platinum resistance thermometer |
| B. | Copper wire |
| C. | Potentiometer wire |
| D. | Triode |
| Answer» E. | |
| 117. |
Consider the following statements. A |
| A. | 1, 2 and 3 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» C. 2 and 3 | |
| 118. |
Choke |
| A. | A paramagnetic core |
| B. | A diamagnetic core |
| C. | Air core |
| D. | Iron core |
| Answer» E. | |
| 119. |
A straight horizontal |
| A. | The needle remains perpendicular to the conductor |
| B. | The needle remains parallel to the conductor |
| C. | The north pole of the needle is deflected towards east |
| D. | The north pole of the needle is deflected toward west |
| Answer» D. The north pole of the needle is deflected toward west | |
| 120. |
Soft iron |
| A. | Low hysteresis loss and low permeability |
| B. | High hysteresis loss and low permeability |
| C. | Low hysteresis loss and high permeability |
| D. | High hysteresis loss and high permeability |
| Answer» D. High hysteresis loss and high permeability | |
| 121. |
A small piece of an |
| A. | Paramagnetic |
| B. | Diamagnetic |
| C. | Ferromagnetic |
| D. | Non magnetic |
| Answer» C. Ferromagnetic | |
| 122. |
Which of the following properties is processed by the |
| A. | Directional property |
| B. | Alternating magnetic substance |
| C. | Hysterasis |
| D. | Susceptability |
| Answer» D. Susceptability | |
| 123. |
The susceptibility of |
| A. | Small and negative |
| B. | Small and positive |
| C. | Large and negative |
| D. | large and positive |
| Answer» C. Large and negative | |
| 124. |
1 volt |
| A. | 1 J |
| B. | 1 J / C |
| C. | 1 C / J |
| D. | none of these |
| Answer» C. 1 C / J | |
| 125. |
An electron is projected in the |
| A. | There will be no effect on the motion of the electron |
| B. | The electron speed will increase but the direction will not change |
| C. | The elector speed will decrease but direction will not change |
| D. | None of the above |
| Answer» B. The electron speed will increase but the direction will not change | |
| 126. |
A choke coil has |
| A. | High inductance and high resistance |
| B. | High inductance and low resistance |
| C. | Low inductance and high resistance |
| D. | Low inductance and low resistance |
| Answer» C. Low inductance and high resistance | |
| 127. |
Current |
| A. | Internal resistance is equal to external resistance |
| B. | Internal resistance is greater than external resistance |
| C. | Internal resistance is less than external resistance |
| D. | None of the above |
| Answer» B. Internal resistance is greater than external resistance | |
| 128. |
The core of a |
| A. | Ratio of the voltage across the secondary and primary is doubled |
| B. | The weight of the transformer can be kept low |
| C. | The rusting of the core is prevented |
| D. | Energy loss due to eddy currents is minimised |
| Answer» E. | |
| 129. |
Capacity of parallel |
| A. | Increasing the distance between the plate |
| B. | Increasing the thickness of the plate |
| C. | Decreasing the thickness of the plate |
| D. | Decreasing the distance between the plate |
| Answer» E. | |
| 130. |
Electric field |
| A. | Is zero |
| B. | Is constant |
| C. | Increase with the distance from the centre of the sphere |
| D. | None of the above |
| Answer» B. Is constant | |
| 131. |
For an |
| A. | In the same direction |
| B. | In opposite direction |
| C. | Perpendicular to each other |
| D. | Not related |
| Answer» C. Perpendicular to each other | |
| 132. |
If a wire of resistivity |
| A. | Be half |
| B. | Be double |
| C. | Be four times |
| D. | Not change |
| Answer» E. | |
| 133. |
A piece of |
| A. | Each of them decreases |
| B. | Each of them increases |
| C. | Copper increases and germanium decreases |
| D. | Copper decreases and germanium increases |
| Answer» E. | |
| 134. |
When the radius of the T.G. coil is decreased, its sensitiveness |
| A. | Decreases |
| B. | Increases |
| C. | Remains unaltered |
| D. | None of these |
| Answer» C. Remains unaltered | |
| 135. |
By increasing the number of turns in the coil, the strength of the magnetic field |
| A. | Decreases |
| B. | Increases |
| C. | First increases then decreases |
| D. | Remains unchanged |
| Answer» C. First increases then decreases | |
| 136. |
A galvanometer is converted into a voltmeter when we connect a |
| A. | High resistance in series |
| B. | High resistance in parallel |
| C. | Low resistance in parallel |
| D. | Low resistance in series |
| Answer» B. High resistance in parallel | |
| 137. |
Good resistance coils are made of |
| A. | Copper |
| B. | Manganin |
| C. | Gold |
| D. | Silver |
| Answer» C. Gold | |
| 138. |
Energy stored in the choke coil in the form of |
| A. | Heart |
| B. | Electric energy |
| C. | Magnetic energy |
| D. | None of these |
| Answer» D. None of these | |
| 139. |
The core of a transformer is laminated to reduce |
| A. | Copper loss |
| B. | Magnetic loss |
| C. | Eddy current loss |
| D. | Hysteresis loss |
| Answer» D. Hysteresis loss | |
| 140. |
The energy stored in a capacitor is actually stored |
| A. | On the positive plate |
| B. | On the negative plate |
| C. | On the outer surface of the body |
| D. | Between the plates |
| Answer» D. Between the plates | |
| 141. |
A soap bubble is given negative charge then its radius |
| A. | Decreases |
| B. | Increases |
| C. | Remains unchanged |
| D. | None fo these |
| Answer» C. Remains unchanged | |
| 142. |
All the magnetic materials lose their magnetic properties when |
| A. | Dipped in water |
| B. | Dipped in oil |
| C. | Brought near a piece of iron |
| D. | Strongly heated |
| Answer» E. | |
| 143. |
The electric field intensity on the surface of a charged conductor is |
| A. | Zero |
| B. | Directed normally to the surface |
| C. | Directed tangentially to the surface |
| D. | Directed along 45 to the surface |
| Answer» C. Directed tangentially to the surface | |
| 144. |
The relative permeability of a paramagnetic material is |
| A. | Greater than unity |
| B. | Less than unity |
| C. | Equal to unity |
| D. | negative |
| Answer» B. Less than unity | |
| 145. |
Kirchoff's first law, i.e. I = 0 at a junction, deals with conservation of |
| A. | Charge |
| B. | Energy |
| C. | Momentum |
| D. | Angular momentum |
| Answer» B. Energy | |
| 146. |
The resistance of material increases with temperature. It is a |
| A. | Metal |
| B. | Insulator |
| C. | Semiconductor |
| D. | None of these |
| Answer» B. Insulator | |
| 147. |
Fuse wire should have |
| A. | Low resistance, high melting point |
| B. | Low resistance, low melting point |
| C. | High resistance, low melting point |
| D. | High resistance, high melting point |
| Answer» D. High resistance, high melting point | |
| 148. |
Magnetic field inside a solenoid is |
| A. | Directly proportional to current |
| B. | Inversely proportional to current |
| C. | Directly proportional to its length |
| D. | Inversely proportional to the total number of turns |
| Answer» B. Inversely proportional to current | |
| 149. |
Electromotive force is most closely related to |
| A. | Electric field |
| B. | Magnetic field |
| C. | Potential difference |
| D. | Mechanical force |
| Answer» D. Mechanical force | |
| 150. |
Two free parallel wires carrying currents in opposite directions. |
| A. | Do not affect each other |
| B. | Attract each other |
| C. | Repel each other |
| D. | None of these |
| Answer» D. None of these | |