MCQOPTIONS
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MCQOPTIONS
This section includes 731 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 401. |
What is the smallest unit of power? |
| A. | Watt |
| B. | Kilowatt |
| C. | Horse power |
| D. | Milliwatt |
| Answer» B. Kilowatt | |
| 402. |
A radio set of 60 watts runs for 50 hours. How many units of electrical energy are consumed in kWh? |
| A. | 2 kWh |
| B. | 3 kWh |
| C. | 4 kWh |
| D. | 2.5 kWh |
| Answer» C. 4 kWh | |
| 403. |
What happens to the body on which work is done: |
| A. | It loses energy |
| B. | It gains energy |
| C. | No change in the energy |
| D. | First it loses then it gain |
| Answer» C. No change in the energy | |
| 404. |
In 1 minute how much energy does a 100 W electric bulb transfers? |
| A. | 100 J |
| B. | 600 J |
| C. | 3600 J |
| D. | 6000 J |
| Answer» E. | |
| 405. |
When an object falls freely towards the ground, then its total energy: |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | First increases then decreases |
| Answer» D. First increases then decreases | |
| 406. |
The commercial unit of Energy is: |
| A. | Watt |
| B. | Watt-hour |
| C. | Kilowatt-hour |
| D. | Kilowatt |
| Answer» D. Kilowatt | |
| 407. |
Joule is a unit of: |
| A. | Work |
| B. | Power |
| C. | Momentum |
| D. | None of the above |
| Answer» B. Power | |
| 408. |
The energy possessed by a body due to its position is called: |
| A. | Kinetic Energy |
| B. | Potential Energy |
| C. | Mechanical Energy |
| D. | Electrical Energy |
| Answer» C. Mechanical Energy | |
| 409. |
Which of the following device converts chemical energy in to electrical energy? |
| A. | Battery |
| B. | Loud Speaker |
| C. | Solar Cell |
| D. | Electric Motor |
| Answer» B. Loud Speaker | |
| 410. |
Which of the following devices is run by power circuit in the house? |
| A. | Tube-lights |
| B. | Electric iron |
| C. | Television |
| D. | Radio |
| Answer» C. Television | |
| 411. |
Which of the following devices is run by lighting circuit in the house? |
| A. | Electric bulb |
| B. | Tube-lights |
| C. | Fans |
| D. | All of the above |
| Answer» E. | |
| 412. |
What is the fuse of power circuit? |
| A. | 5 A fuse |
| B. | 18 A fuse |
| C. | 15 A fuse |
| D. | 10 A fuse |
| Answer» D. 10 A fuse | |
| 413. |
What is the fuse of lighting circuit? |
| A. | 20 A fuse |
| B. | 5 A fuse |
| C. | 18 A fuse |
| D. | 5 A fuse |
| Answer» C. 18 A fuse | |
| 414. |
Which of the following are the two separate circuits in a house? |
| A. | Lighting and power circuit |
| B. | Open and closed circuit |
| C. | Series and parallel circuit |
| D. | None of the above |
| Answer» B. Open and closed circuit | |
| 415. |
In which unit is the electrical energy consumed by us recorded? |
| A. | Volt |
| B. | Kilowatt-minute |
| C. | Kilowatt-hour |
| D. | Kilowatt-second |
| Answer» D. Kilowatt-second | |
| 416. |
What is the rating of main fuse which is put in the live wire? |
| A. | 10 amperes |
| B. | 140 amperes |
| C. | 50 amperes |
| D. | 65 amperes |
| Answer» D. 65 amperes | |
| 417. |
What is the colour of insulation covering on neutral wire? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» E. | |
| 418. |
What is the colour of insulation covering on live wire? |
| A. | Green |
| B. | Red |
| C. | Black |
| D. | Yellow |
| Answer» C. Black | |
| 419. |
What is the electric potential of neutral wire? |
| A. | Zero volt |
| B. | 100 volt |
| C. | 10 volt |
| D. | 10 volt |
| Answer» B. 100 volt | |
| 420. |
How much electric potential does the live wire carry? |
| A. | 100 volts |
| B. | 150 volts |
| C. | 185 volts |
| D. | 20 volts |
| Answer» E. | |
| 421. |
Where do we use transformers? |
| A. | Power stations |
| B. | Radio sets |
| C. | Television |
| D. | All of the above |
| Answer» E. | |
| 422. |
Which of the following parts is not there in A.C. generator? |
| A. | Slip rings |
| B. | Coil |
| C. | Commutator |
| D. | Galvanometer |
| Answer» D. Galvanometer | |
| 423. |
Which of the following parts of the generators is stationary to produce electricity in large powerhouses? |
| A. | Coil |
| B. | Electromagnet |
| C. | Slip rings |
| D. | Carbon brush |
| Answer» B. Electromagnet | |
| 424. |
In generators, the voltage produced can be increased by: |
| A. | Coil with more turns |
| B. | Rotating coil faster |
| C. | Using coil with larger area |
| D. | All of the above |
| Answer» E. | |
| 425. |
What is the frequency of alternating current produced in India? |
| A. | 15 Hz |
| B. | 50 Hz |
| C. | 55 Hz |
| D. | 65 Hz |
| Answer» C. 55 Hz | |
| 426. |
Which of the following convert’s mechanical energy into electrical energy? |
| A. | Refrigerator |
| B. | Fan |
| C. | Electric motor |
| D. | Electric generator |
| Answer» E. | |
| 427. |
Which of the following are the sources for producing alternating current? |
| A. | Power house generators |
| B. | Bicycle dynamos |
| C. | Car alternators |
| D. | All of the above |
| Answer» E. | |
| 428. |
At what time interval does the alternating current produced in India reverse its direction? |
| A. | 1/100 second |
| B. | 5 seconds |
| C. | 1 minute |
| D. | 5 minutes |
| Answer» B. 5 seconds | |
| 429. |
If the current reverses direction after equal intervals of time, it is called: |
| A. | Direct current |
| B. | Alternating current |
| C. | Induced current |
| D. | Ionic current |
| Answer» C. Induced current | |
| 430. |
Which of the following are sources of direct current? |
| A. | Dry cell |
| B. | Car battery |
| C. | D.C. generator |
| D. | All of the above |
| Answer» E. | |
| 431. |
What is the current flowing in one direction called? |
| A. | Alternating current |
| B. | Induced current |
| C. | Direct current |
| D. | Ionic current |
| Answer» D. Ionic current | |
| 432. |
The production of electric current by moving a magnet inside a fixed coil of wire is a case of: |
| A. | Electromagnetism |
| B. | Electromagnetic induction |
| C. | Making permanent magnet |
| D. | None of the above |
| Answer» C. Making permanent magnet | |
| 433. |
Magnitude of current induced in the coil can be increased by increasing: |
| A. | Number of coil turns |
| B. | Strength of magnet |
| C. | Speed of coil rotation |
| D. | All of the above |
| Answer» E. | |
| 434. |
What needs to be reversed in order to reverse the direction of induced current? |
| A. | Direction of magnetic field |
| B. | Direction of current |
| C. | Direction of force |
| D. | All of the above |
| Answer» B. Direction of current | |
| 435. |
The process of electromagnetic induction has led to the construction of: |
| A. | Motors |
| B. | Generators |
| C. | Transformers |
| D. | Switch |
| Answer» C. Transformers | |
| 436. |
Who discovered the phenomenon of electromagnetic induction? |
| A. | Michael Faraday and Joseph Henry |
| B. | Albert Einstein |
| C. | Isaac Newton |
| D. | Galileo Galilei |
| Answer» B. Albert Einstein | |
| 437. |
The current produced by moving a straight wire in a magnetic field is called: |
| A. | Direct current |
| B. | Alternating current |
| C. | Induced current |
| D. | Electromagnetism |
| Answer» D. Electromagnetism | |
| 438. |
The production of electricity from magnetism is called: |
| A. | Electromagnetic induction |
| B. | Electromagnetism |
| C. | Electroluminescent wire |
| D. | Electrostatics |
| Answer» B. Electromagnetism | |
| 439. |
Which metal wire is used in the coil of the motor used commercially? |
| A. | Aluminium |
| B. | Silver |
| C. | Nickel |
| D. | Copper |
| Answer» E. | |
| 440. |
Who introduced metric system? |
| A. | France Government |
| B. | Indian Government |
| C. | European Government |
| D. | None of the above |
| Answer» B. Indian Government | |
| 441. |
Who had given the theory of Plate tectonics? |
| A. | Ernest Rutherford |
| B. | John Bardeen |
| C. | Max Planck |
| D. | Alfred Wegener |
| Answer» E. | |
| 442. |
Who had given the concept of Photovoltaic effect? |
| A. | Alfred Wegner |
| B. | Edmund Becquerel |
| C. | Leucippus |
| D. | Thomas Kibble |
| Answer» C. Leucippus | |
| 443. |
Who had given the phenomena of Blood Circulation? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» B. | |
| 444. |
The Chemical evolution of life was proposed by: |
| A. | Newland |
| B. | Darwin |
| C. | Oparin |
| D. | William Caxton |
| Answer» D. William Caxton | |
| 445. |
Small Pox vaccine was invented by: |
| A. | A. Fleming |
| B. | Ronald Ross |
| C. | James Chadwick |
| D. | Louis Pasteur |
| Answer» E. | |
| 446. |
Artificial ‘gene’ was created by: |
| A. | Meghnad Saha |
| B. | D. Rutherford |
| C. | Hargobind Khorana |
| D. | Oparin |
| Answer» D. Oparin | |
| 447. |
Name the scientist who had discovered that earth revolves round the sun? |
| A. | Copernicus |
| B. | James Arkwright |
| C. | Marconi |
| D. | J. Kepler |
| Answer» B. James Arkwright | |
| 448. |
Which of the following pairs is incorrect? |
| A. | Roentgen: X-Ray |
| B. | Newton: Law of Gravitation |
| C. | Faraday: Diffusion of gases |
| D. | Pasteur: Bacteriology |
| Answer» D. Pasteur: Bacteriology | |
| 449. |
Who had discovered oxygen? |
| A. | Rutherford |
| B. | William Harvey |
| C. | Priestly |
| D. | Galileo |
| Answer» D. Galileo | |
| 450. |
Doctor’s Thermometer was invented by: |
| A. | Newton |
| B. | Fahrenheit |
| C. | Louis Pasteur |
| D. | None of the above |
| Answer» C. Louis Pasteur | |