MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The laws of electromagnetic induction have been used to make which of the following - |
| A. | Straightener |
| B. | voltmeter |
| C. | electric motor |
| D. | generator |
| Answer» E. | |
| 2. |
In which direction does the magnetic needle point? |
| A. | East |
| B. | Sky |
| C. | Answer |
| D. | West |
| Answer» D. West | |
| 3. |
The characteristic of superconductor is - |
| A. | high resistivity |
| B. | low resistivity |
| C. | zero resistivity |
| D. | infinite resistivity |
| Answer» D. infinite resistivity | |
| 4. |
A magnetic material can be demagnetized by - |
| A. | hammering |
| B. | by heating |
| C. | both of the above |
| D. | None |
| Answer» D. None | |
| 5. |
The electric motor works according to the following principle. |
| A. | rules of OM |
| B. | Lenz's law |
| C. | Fleming's law |
| D. | Faraday's law |
| Answer» E. | |
| 6. |
With which deity does Murugan, mentioned in the Sangam texts, equate? |
| A. | Shiv |
| B. | Skand |
| C. | Krishna |
| D. | Balaram |
| Answer» C. Krishna | |
| 7. |
Which of the following is diamagnetic - |
| A. | Iron |
| B. | cobalt |
| C. | bismuth |
| D. | Nickel |
| Answer» D. Nickel | |
| 8. |
The temperature of the filament of a burning electric bulb is generally - |
| A. | 100 - 500 डिग्री |
| B. | 1000 - 1500 डिग्री |
| C. | 2000 - 2500 डिग्री |
| D. | 3000 - 3500 डिग्री |
| Answer» D. 3000 - 3500 डिग्री | |
| 9. |
The date of classical texts in the Sangam age was - |
| A. | 600 B.C - 300 B.C |
| B. | 300 B.C-100 B.C |
| C. | 200 B.C-200 A.D |
| D. | 100 B.C-100A.D |
| Answer» E. | |
| 10. |
The metal used for making lightning conductor is - |
| A. | aluminum |
| B. | iron and copper |
| C. | Such as |
| D. | none of these |
| Answer» C. Such as | |
| 11. |
Alternating current is converted into direct current. |
| A. | by dynamo |
| B. | by rectifier |
| C. | By transformer |
| D. | by oscillator |
| Answer» C. By transformer | |
| 12. |
The machine that converts electrical energy into mechanical energy is |
| A. | electric motor |
| B. | transformer |
| C. | Inductor |
| D. | dynamos |
| Answer» B. transformer | |
| 13. |
The device used to store electric charge is called |
| A. | Transformer |
| B. | capacitor |
| C. | Motivational |
| D. | Transistor |
| Answer» C. Motivational | |
| 14. |
Which of the following metals are used as semiconductors in transistors? |
| A. | copper |
| B. | germanium |
| C. | graphite |
| D. | silver |
| Answer» C. graphite | |
| 15. |
Electric current does not flow between two charged objects connected together, if they are - |
| A. | at the same resistivity |
| B. | on equal holding |
| C. | at the same potential |
| D. | on the same impulse |
| Answer» D. on the same impulse | |
| 16. |
What is Silicon |
| A. | semiconductor |
| B. | insulator |
| C. | Insulator |
| D. | Driver |
| Answer» B. insulator | |
| 17. |
The wrong statement about the resistance of a wire is - |
| A. | It depends on the metal of the wire. |
| B. | This is in direct proportion to the length of the wire. |
| C. | It is proportional to the area of cross section of the wire. |
| D. | The resistance of the wire increases with increase in temperature. |
| Answer» D. The resistance of the wire increases with increase in temperature. | |
| 18. |
What is the current carrying conductor associated with? |
| A. | electromagnetic field |
| B. | electric field |
| C. | electrostatic |
| D. | Magnetic Field |
| Answer» B. electric field | |
| 19. |
In an electric three pin plug, the longest pin should be connected - |
| A. | indifferently |
| B. | from the living end |
| C. | base end |
| D. | by any means |
| Answer» D. by any means | |
| 20. |
The substances which conduct electricity at high temperature but not at lowest temperature are called |
| A. | semiconductor |
| B. | metallic conductor |
| C. | insulating |
| D. | super conductor |
| Answer» B. metallic conductor | |
| 21. |
What was the book Tolkappiyam? |
| A. | scripture |
| B. | grammar book |
| C. | scriptures |
| D. | grammar book |
| Answer» C. scriptures | |
| 22. |
Photoelectric cell changes - |
| A. | mechanical energy into electrical energy |
| B. | heat energy into mechanical energy |
| C. | light energy into chemical energy |
| D. | light energy into electrical energy |
| Answer» E. | |
| 23. |
If a bar magnet is cut into two equal parts, what will be the effect on the polar force of each piece? |
| A. | will double |
| B. | will be half |
| C. | will be zero |
| D. | will remain unchanged |
| Answer» E. | |
| 24. |
The maximum temperature attained by a superconductor at normal pressure is |
| A. | 24 केल्विन |
| B. | 138 केल्विन |
| C. | 150 केल्विन |
| D. | 300 केल्विन |
| Answer» C. 150 केल्विन | |
| 25. |
Where does the pure metal collect during electroplating? |
| A. | Anode |
| B. | cathode |
| C. | electrolyte |
| D. | Utensil |
| Answer» C. electrolyte | |
| 26. |
Basic electrical wiring installation |
| A. | Category connection. |
| B. | parallel connection. |
| C. | There is a combination of series and parallel relations. |
| D. | There is a category relationship inside each room and a parallel relationship elsewhere. |
| Answer» C. There is a combination of series and parallel relations. | |
| 27. |
Prehistoric axes have been found |
| A. | Superfluous |
| B. | adirachannaloor |
| C. | Arikamedu |
| D. | Sanur |
| Answer» B. adirachannaloor | |
| 28. |
The wire used in a fuse has a characteristic. |
| A. | Low Resistance Strength / High Melting Point |
| B. | Low Resistance Strength / Low Melting Point |
| C. | High resistive power / low melting point |
| D. | High resistive power/high melting point |
| Answer» D. High resistive power/high melting point | |
| 29. |
Earth is used in electrical equipment |
| A. | to reduce expenses. |
| B. | For security. |
| C. | as a fuse |
| D. | क्योंकि उपकरण फेज - 3 में काम करते हैं। |
| Answer» C. as a fuse | |
| 30. |
Fuse is used as a safety device in mains power supply. Which one of the following statements about fuses is correct - |
| A. | It is connected in parallel series with the main switch. |
| B. | It needs to have a very high resistance. |
| C. | It is mainly made of silver alloy. |
| D. | Its melting point must be low. |
| Answer» E. | |
| 31. |
Which gas is usually filled in tube lights? |
| A. | sodium vapor with argon |
| B. | mercury vapor with argon |
| C. | mercury vapor with neon |
| D. | sodium vapor with neon |
| Answer» C. mercury vapor with neon | |
| 32. |
What is the name of the device which records the electrical changes during heartbeat? |
| A. | sphygmomanometer |
| B. | electrocardiograph |
| C. | electrocardiogram |
| D. | Stethoscope |
| Answer» D. Stethoscope | |
| 33. |
Identify the false statement regarding batteries used in cars. |
| A. | इसकी वोल्टता सामान्यतः12 वोल्ट होती है। |
| B. | It consists of a lead cathode and a lead oxide anode. |
| C. | In this, hydrochloric acid is used as an electrolyte. |
| D. | It is a rechargeable battery. |
| Answer» D. It is a rechargeable battery. | |
| 34. |
Alternating current is converted into direct current by - |
| A. | by dynamo |
| B. | by motor |
| C. | by rectifier |
| D. | by transformer |
| Answer» D. by transformer | |
| 35. |
The electricity consumption bill is based on the measurement of - 1- Wattage 2- Voltage 3- Ohm 4- Ampere |
| A. | केवल 1 |
| B. | 1 और 2 |
| C. | 2 और 3 |
| D. | 1 और 4 |
| Answer» B. 1 और 2 | |
| 36. |
On heating the resistance of a semiconductor - |
| A. | remains constant. |
| B. | Happens. |
| C. | grows. |
| D. | none of the above |
| Answer» C. grows. | |
| 37. |
In which port the pearls were found mentioned in the Periplus of the Erythrian Sea? |
| A. | Sopatma |
| B. | Poduka |
| C. | Yesterday |
| D. | Slave |
| Answer» D. Slave | |
| 38. |
Who among the following is the best driver? |
| A. | Gold |
| B. | silver |
| C. | copper |
| D. | mica |
| Answer» C. copper | |
| 39. |
The substances which have infinite electrical resistance are called |
| A. | Driver |
| B. | Dissolved |
| C. | Resistance |
| D. | insulating |
| Answer» E. | |
| 40. |
Fleming's right hand rule is used to find the direction of |
| A. | induced current |
| B. | actual current |
| C. | direct current |
| D. | alternating current |
| Answer» B. actual current | |
| 41. |
Which of the following is a step magnitude? |
| A. | Speed |
| B. | Force |
| C. | angular momentum |
| D. | electrostatic force |
| Answer» E. | |
| 42. |
converts dynamo |
| A. | high voltage to low voltage |
| B. | electrical energy into mechanical energy |
| C. | mechanical energy into electrical energy |
| D. | low voltage to high voltage |
| Answer» D. low voltage to high voltage | |
| 43. |
Out of the two bulbs in a house, one bulb is brighter than the other. Which of the two bulbs has the higher resistor? |
| A. | in a dim light bulb |
| B. | The intensity of the light does not depend on the resistor. |
| C. | The resistors in both the bulbs are equivalent. |
| D. | in more light bulbs |
| Answer» B. The intensity of the light does not depend on the resistor. | |
| 44. |
Which one of the following statements is not correct regarding a person with farsightedness? |
| A. | A concave lens is used to correct this defect. |
| B. | The lens has more aperture. |
| C. | One can see distant objects clearly. |
| D. | The image of a near object is focused behind the retina. |
| Answer» B. The lens has more aperture. | |
| 45. |
The Kannagi described in the Sangam literature is - |
| A. | heroine of tamil epic |
| B. | group of traders |
| C. | unreasonable love |
| D. | one sided love |
| Answer» B. group of traders | |
| 46. |
In a tunnel five bulbs of 100 watt capacity are lit continuously for 20 hours. The power consumption will be - |
| A. | one unit |
| B. | two units |
| C. | twenty units |
| D. | ten units |
| Answer» E. | |
| 47. |
Photoelectric effect is called when a substance - |
| A. | Get hot |
| B. | began to emit electrically charged electrons. |
| C. | placed in a strong electric field. |
| D. | electrons collide with it. |
| Answer» C. placed in a strong electric field. | |
| 48. |
There is an endoscope |
| A. | simple microscope |
| B. | camera type |
| C. | narrow visionary |
| D. | none of these |
| Answer» E. | |
| 49. |
Light waves are |
| A. | electromagnetic waves |
| B. | magnetic waves |
| C. | electrostatic waves |
| D. | electric waves |
| Answer» B. magnetic waves | |
| 50. |
The concept of broadcast world is based on – |
| A. | on the Zeeman effect |
| B. | on the stark effect |
| C. | on the doppler effect |
| D. | Raman Effect |
| Answer» D. Raman Effect | |