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.
| 51. |
Ampere rule is used to find the |
| A. | Direction of current |
| B. | Direction of magnetic field |
| C. | Direction of motion of the conductor |
| D. | None of the above |
| Answer» E. | |
| 52. |
At the time of short circuit, the current in the circuit |
| A. | vary continuously |
| B. | increases heavily |
| C. | decreases substantially |
| D. | does not change |
| Answer» C. decreases substantially | |
| 53. |
A wire is bent in the form of uniform circular ring. A and B are two points on the ring such that AOB = 60 , where O is the center of ring. If the equivalent resistance across A and B is 5. what is the resistance of whole wire? |
| A. | 5 |
| B. | 6 |
| C. | 30 |
| D. | 36 |
| Answer» C. 30 | |
| 54. |
The frequency of A.C. mains in India is |
| A. | 30 c/s |
| B. | 50 c/s |
| C. | 60 c/s |
| D. | 120 c/s |
| Answer» C. 60 c/s | |
| 55. |
Electric iron uses wires of alloy as |
| 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) | |
| 56. |
Transformer is used |
| 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. | |
| 57. |
In a three pin plug, the longest pin should be connected to |
| A. | ground terminal |
| B. | live terminal |
| C. | neutral terminal |
| D. | any terminal |
| Answer» B. live terminal | |
| 58. |
Dynamo is a machine which is used for conversion of |
| 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. | |
| 59. |
A 100 watt electric bulb is used for 10 hours. What will be the cost of electricity consumed, if the consumption cost is 5 per unit ? |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» B. 10 | |
| 60. |
Which of the following is the best conductor of electricity ? |
| A. | Aluminium |
| B. | Copper |
| C. | Silver |
| D. | Gold |
| Answer» D. Gold | |
| 61. |
In television broadcast, the picture signals are transmitted by |
| A. | amplitude modulation |
| B. | frequency modulation |
| C. | phase modulation |
| D. | angle modulation |
| Answer» C. phase modulation | |
| 62. |
A dynamo which is said to generate electricity actually acts as a |
| A. | Source of ions |
| B. | Source of electric charge |
| C. | Converter of energy |
| D. | Source of electrons |
| Answer» D. Source of electrons | |
| 63. |
Which of the following is not an electromagnetic wave? |
| A. | v - rays |
| B. | cosmic rays |
| C. | Microwave |
| D. | Radio wave |
| Answer» C. Microwave | |
| 64. |
What should be the characteristic of fuse wire? |
| 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. | |
| 65. |
The heating element of an electric heater should be made with a material , which should have |
| 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 | |
| 66. |
Parameters of electricity supply in India are |
| 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 | |
| 67. |
The earth's magnetic field always has a vertical component except at the |
| A. | magnetic equator |
| B. | magnetic poles |
| C. | geographic north pole |
| D. | latitude 45 |
| Answer» B. magnetic poles | |
| 68. |
The magnet is strongest near the |
| A. | poles of the magnet |
| B. | ends of the magnet |
| C. | centre of magnet |
| D. | on equator point from the poles of the magnet |
| Answer» C. centre of magnet | |
| 69. |
Why does one experience a strong shock when one accidentally touches a live wire of , say, 220 V? |
| 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 | |
| 70. |
When an electrical safety fuse is rated (marked) as 16 A, it means it |
| A. | will not work if current is less than 16 A |
| B. | has a resistance of 16 W |
| C. | will work if the temperature is more than 16 C |
| D. | will be blown (break) if current exceeds 16 A |
| Answer» E. | |
| 71. |
If a body is charged by rubbing it, its weight |
| A. | remains precisely constant |
| B. | increases slightly |
| C. | decreases slightly |
| D. | may increase slightly or may decrease slightly |
| Answer» E. | |
| 72. |
Which of the following quantities remains constant in a step-down transformer? |
| A. | Current |
| B. | Voltage |
| C. | Power |
| D. | None of these |
| Answer» D. None of these | |
| 73. |
Which of the following is not correctly matched ? |
| A. | Voltameter-potential difference |
| B. | Ammeter - electric current |
| C. | Potentiometer - E.M.F. |
| D. | Meter bridge-electrical resistance |
| Answer» B. Ammeter - electric current | |
| 74. |
Consider the following statements. A copper voltmeter measures the
|
| A. | 1, 2 and 3 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 1 and 3 |
| Answer» C. 2 and 3 | |
| 75. |
Capacity of parallel plate condenser can be increased by |
| 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. | |
| 76. |
Which of the following is not the cause of low conductivity of electrolyte? |
| 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. | |
| 77. |
When no current is passed through a conductor |
| A. | The free electrons do not move |
| B. | The average thermal velocity of a free electon over a large period of time is zero |
| C. | The average of thermal velocities of all free electrons at an instant is zero |
| D. | Both (b) and (c) |
| Answer» E. | |
| 78. |
A particle of mass m and charge q travels from rest through a potential difference V. Its final energy is |
| A. | qV |
| B. | mqV |
| C. | qV / m |
| D. | mq / V |
| Answer» B. mqV | |
| 79. |
An example of a non-ohmic device is |
| A. | Platinum resistance thermometer |
| B. | Copper wire |
| C. | Potentiometer wire |
| D. | Triode |
| Answer» E. | |
| 80. |
The susceptibility of a para magnetic material |
| A. | Varies directly as the temperature |
| B. | Varies inversely ass the temperature |
| C. | does not depend on the temperature |
| D. | none of the above |
| Answer» C. does not depend on the temperature | |
| 81. |
The equivalent resistance of n identical resistors connected in parallel is x. If the resistors are connected in series, the equivalent world be |
| A. | nx |
| B. | n |
| C. | x |
| D. | x / n |
| E. | x / n |
| Answer» C. x | |
| 82. |
A piece of copper and another germanium are cooled from room temperature of 40 K. The resistance 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. | |
| 83. |
If a wire of resistivity is stretched to double its length, then its new resistivity will |
| A. | Be half |
| B. | Be double |
| C. | Be four times |
| D. | Not change |
| Answer» E. | |
| 84. |
A fuse wire is made of |
| A. | An alloy of tin and copper |
| B. | An alloy of tin and lead |
| C. | An alloy of tin and aluminium |
| D. | An alloy of nickel and chromium |
| Answer» C. An alloy of tin and aluminium | |
| 85. |
The capacitance unit of convenient size is |
| A. | Farad |
| B. | Microfarad |
| C. | Kilo farad |
| D. | Mega farad |
| Answer» C. Kilo farad | |
| 86. |
Which of the following units measure energy? |
| A. | Kilowatt-hour |
| B. | (volt) |
| C. | (sec) (ohm) |
| D. | (weber) (ampere) |
| E. | All of the above |
| Answer» E. All of the above | |
| 87. |
How many electrons will have a charge of one coulomb? |
| A. | 6.2 X 10 |
| B. | 6.2 X 10 |
| C. | 5.2 X 10 |
| D. | 5.2 X 10 |
| Answer» B. 6.2 X 10 | |
| 88. |
For high frequency, the capacity offers |
| A. | More resistance |
| B. | Less resistance |
| C. | Zero resistance |
| D. | None of these |
| Answer» C. Zero resistance | |
| 89. |
Ampere rule |
| A. | Direction of current |
| B. | Direction of magnetic field |
| C. | Direction of motion of the conductor |
| D. | None of the above |
| Answer» E. | |
| 90. |
Phase difference between voltage and current in a |
| A. | |
| B. | / 2 |
| C. | 0 |
| D. | / 3 |
| Answer» C. 0 | |
| 91. |
Of the two bulbs in a house, one glows brighter then the other. Which of the two has a large resistance? |
| A. | The bright bulb |
| B. | The dim bulb |
| C. | Both have the same resistance |
| D. | The brightness does not depend upon the resistance |
| Answer» C. Both have the same resistance | |
| 92. |
A particle of mass |
| A. | qV |
| B. | mqV |
| C. | qV / m |
| D. | mq / V |
| Answer» B. mqV | |
| 93. |
At a point inside a charged |
| A. | Electric field is zero |
| B. | Electric field is constant |
| C. | Potential is constant |
| D. | (a) and (c) both |
| Answer» E. | |
| 94. |
Metals getting magnetized by orientation of |
| A. | Ferromagnetic |
| B. | Anti-magnetic |
| C. | Paramagnetic |
| D. | Diamagnetic |
| Answer» D. Diamagnetic | |
| 95. |
A substance, when inserted between the |
| A. | Diamagnetic |
| B. | Paramagnetic |
| C. | Ferromagnetic |
| D. | None of these |
| Answer» B. Paramagnetic | |
| 96. |
A particle is moving in a |
| A. | Its momentum changes but total energy remains same |
| B. | Both momentum and total energy remains same |
| C. | Both momentum and total energy change |
| D. | Total energy changes but momentum remains the same |
| Answer» B. Both momentum and total energy remains same | |
| 97. |
The material of a |
| A. | High retentivity, low coercivity |
| B. | Low retentivity, low corecivity |
| C. | Low retentivity, high coercivity |
| D. | High retentivity, high coercivity |
| Answer» E. | |
| 98. |
Domestic electrical |
| A. | series connection |
| B. | parallel connection |
| C. | combination of series and parallel connections |
| D. | series connection within each room and parallel connection elsewhere |
| Answer» C. combination of series and parallel connections | |
| 99. |
What is the order of |
| A. | 102 ohm |
| B. | 104 ohm |
| C. | 106 ohm |
| D. | 108 ohm |
| Answer» C. 106 ohm | |
| 100. |
A wire is bent in the form of |
| A. | 5 |
| B. | 6 |
| C. | 30 |
| D. | 36 |
| Answer» C. 30 | |