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. |
If 1 A of current passes through a bulb that consumes 1 J of energy then the potential difference is |
| A. | 1 volt |
| B. | 2 volts |
| C. | 3 volts |
| D. | 4 volts |
| Answer» B. 2 volts | |
| 2. |
The energy supplied by a battery to a unit positive charge when it flows through the closed circuit is called |
| A. | potential difference |
| B. | electromotive force |
| C. | ohm's law |
| D. | conventional current |
| Answer» C. ohm's law | |
| 3. |
The first practical electric battery, known as the voltaic pile was developed by |
| A. | Newton |
| B. | Luigi Galvano |
| C. | Alessandro Volta |
| D. | Hooke Alexander |
| Answer» D. Hooke Alexander | |
| 4. |
As per Ohm's law, the amount of current passing through a conductor is directly proportional to the |
| A. | electric field |
| B. | conventional current |
| C. | potential difference |
| D. | electromotive force |
| Answer» D. electromotive force | |
| 5. |
A device which stores charge is called |
| A. | Resistor |
| B. | Inductor |
| C. | capacitor |
| D. | transistor |
| Answer» D. transistor | |
| 6. |
The value of k in coulomb's law depends upon |
| A. | magnitude of charges |
| B. | distance between charges |
| C. | medium between two charges |
| D. | all of above |
| Answer» D. all of above | |
| 7. |
If 5 J of work is required to shift 10 C charge from one place to another then the potential difference is |
| A. | 0.5 V |
| B. | 2 V |
| C. | 5 V |
| D. | 10 V |
| Answer» B. 2 V | |
| 8. |
The coulomb's force between the 2 point charges 10µC and 5µC placed at a distance of 150cm is |
| A. | 0.2 N |
| B. | 0.5 N |
| C. | 2 N |
| D. | 10 N |
| Answer» B. 0.5 N | |
| 9. |
In the combination of capacitors in series, the capacitors are connected |
| A. | parallel |
| B. | side by side |
| C. | up and down |
| D. | none of above |
| Answer» C. up and down | |
| 10. |
1 micro farad (1µF) is equal to |
| A. | 1×10-9F |
| B. | 1×10-12F |
| C. | 1×10-6F |
| D. | 1×10-10F |
| Answer» D. 1×10-10F | |
| 11. |
If the medium between two charges is air, then the value of constant k in SI units will be |
| A. | 5 × 109 Nm²C-2 |
| B. | 7 × 109 Nm²C-2 |
| C. | 8 × 109 Nm²C-2 |
| D. | 9 × 109 Nm²C-2 |
| Answer» E. | |
| 12. |
In electrostatic air cleaner, air mixed with dust and pollen enters device across |
| A. | positively charged mesh |
| B. | negatively charged mesh |
| C. | neutral mesh |
| D. | dual charged mesh |
| Answer» B. negatively charged mesh | |
| 13. |
The property of material due to which it attracts or repels other objects is |
| A. | friction |
| B. | velocity |
| C. | current |
| D. | charge |
| Answer» E. | |
| 14. |
The resonant circuits that tune radios to particular frequencies are called |
| A. | plate circuits |
| B. | radio circuits |
| C. | filter circuits |
| D. | fiber circuits |
| Answer» D. fiber circuits | |
| 15. |
If a CD is made of soft elastic material, it is called |
| A. | flash drive |
| B. | floppy disk |
| C. | hard disk |
| D. | audio cassette |
| Answer» C. hard disk | |
| 16. |
In radio, the coils are connected to |
| A. | inductors |
| B. | resistor |
| C. | fixed capacitor |
| D. | variable capacitor |
| Answer» E. | |
| 17. |
The scientific method used to store information and arrange it for communication is called |
| A. | telecommunication |
| B. | information technology |
| C. | codes |
| D. | information |
| Answer» C. codes | |
| 18. |
The method that is used to communicate information to far off places instantly is called |
| A. | miscommunication |
| B. | telecommunication |
| C. | information technology |
| D. | electromagnetic communication |
| Answer» C. information technology | |
| 19. |
Microwaves are used for |
| A. | telecommunication |
| B. | satellite communication |
| C. | code transfer |
| D. | fighting cancer |
| Answer» C. code transfer | |
| 20. |
In air, alpha particles have range of |
| A. | few centimeters |
| B. | several thousand meters |
| C. | several hundred meters |
| D. | several meters |
| Answer» B. several thousand meters | |
| 21. |
Gamma (γ) radiation are fast moving |
| A. | electrons |
| B. | protons |
| C. | photons |
| D. | neutrons |
| Answer» D. neutrons | |
| 22. |
Radiations present in atmosphere due to different radioactive substances are called |
| A. | environmental radiations |
| B. | background radiations |
| C. | positive radiations |
| D. | cosmic radiations |
| Answer» C. positive radiations | |
| 23. |
A helium nucleus comprising of two protons and two neutrons with a charge of 2e is |
| A. | beta particle |
| B. | gamma particle |
| C. | alpha particle |
| D. | negative particle |
| Answer» D. negative particle | |
| 24. |
In SI base units, 1 Bq is equal to |
| A. | 10 disintegration per second |
| B. | 1.5 disintegration per second |
| C. | 0.01 disintegration per second |
| D. | 1 disintegration per second |
| Answer» E. | |
| 25. |
After refraction by the lens, the ray parallel to the principal axis passes through the |
| A. | optical center |
| B. | vertex |
| C. | focal point |
| D. | core |
| Answer» D. core | |
| 26. |
The focus lies behind the mirror in |
| A. | convex mirror |
| B. | concave mirror |
| C. | silver mirror |
| D. | plane mirror |
| Answer» B. concave mirror | |
| 27. |
Power of a lens is defined as the reciprocal of its |
| A. | focal length in meters |
| B. | principal axis |
| C. | optical center |
| D. | vertex |
| Answer» B. principal axis | |
| 28. |
To see dim stars, we use |
| A. | simple microscope |
| B. | compound microscope |
| C. | endoscope |
| D. | telescope |
| Answer» E. | |
| 29. |
Concave lens is also called |
| A. | diverging lens |
| B. | converging lens |
| C. | convex lens |
| D. | none of above |
| Answer» B. converging lens | |
| 30. |
The speed of sound can be found by relation |
| A. | v = cλ |
| B. | v = ma |
| C. | v = fλ |
| D. | f=1 ⁄ T |
| Answer» D. f=1 ⁄ T | |
| 31. |
The speed of sound in air is |
| A. | 343ms-1 |
| B. | 343ms-2 |
| C. | 341ms-1 |
| D. | 250ms-1 |
| Answer» B. 343ms-2 | |
| 32. |
A normal human ear can hear a sound only if its frequency lies between |
| A. | 30 Hz to 30,000 Hz |
| B. | 50 Hz to 50,000 Hz |
| C. | 20 Hz to 20,000 Hz |
| D. | 10 Hz to 10,000 Hz |
| Answer» D. 10 Hz to 10,000 Hz | |
| 33. |
The technique or method to absorb undesirable sounds by soft and porous surface is called |
| A. | acoustic protection |
| B. | unacoustic protection |
| C. | audible protection |
| D. | decibel protection |
| Answer» B. unacoustic protection | |
| 34. |
To communicate with each other, Elephants use |
| A. | low frequency sound waves |
| B. | low frequency light waves |
| C. | high frequency sound waves |
| D. | low frequency heat waves |
| Answer» B. low frequency light waves | |