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MCQOPTIONS
This section includes 1134 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
The most important piece of hardware is |
| A. | Random-access memory (RAM) |
| B. | Read only memory (ROM) |
| C. | Central processing unit (CPU) |
| D. | Motherboard |
| Answer» D. Motherboard | |
| 302. |
To collect the information and store them in computer in more than one inter linked files is called |
| A. | data storing |
| B. | data managing |
| C. | data cleaner |
| D. | data logging |
| Answer» C. data cleaner | |
| 303. |
The most important piece of hardware is the |
| A. | mouse |
| B. | Central processing unit(CPU) |
| C. | keyboard |
| D. | monitor |
| Answer» C. keyboard | |
| 304. |
If we apply the law of conversion of energy to electromagnetic induction, the electrical energy induced in a conductor comes from the |
| A. | potential energy |
| B. | heat energy |
| C. | kinetic energy |
| D. | mechanical energy |
| Answer» D. mechanical energy | |
| 305. |
To control a large current with the help of a small current, we use the |
| A. | relay |
| B. | fuse |
| C. | breaker |
| D. | transformer |
| Answer» B. fuse | |
| 306. |
Electric motor is a device which converts electric energy into |
| A. | potential energy |
| B. | rotational energy |
| C. | kinetic energy |
| D. | rotational kinetic energy |
| Answer» E. | |
| 307. |
In a practical electric motor, the coil is called |
| A. | armature |
| B. | ammeter |
| C. | pole |
| D. | split |
| Answer» B. ammeter | |
| 308. |
It is made of many loops mounted on a shaft or axle |
| A. | fuse |
| B. | transformer |
| C. | armature |
| D. | circuit |
| Answer» D. circuit | |
| 309. |
A fuse is always connected with live wire in |
| A. | parallel |
| B. | series |
| C. | combination |
| D. | alternative circuit |
| Answer» C. combination | |
| 310. |
In Pakistan, the frequency of alternating current is |
| A. | 40 Hz |
| B. | 50 Hz |
| C. | 60 Hz |
| D. | 70 Hz |
| Answer» C. 60 Hz | |
| 311. |
In house wiring, all appliances are connected in |
| A. | parallel |
| B. | series |
| C. | combination |
| D. | alternative circuit |
| Answer» B. series | |
| 312. |
The equivalent resistance is equal to the sum of the individual resistance of the combination in |
| A. | series combination |
| B. | parallel combination |
| C. | circular combination |
| D. | random combination |
| Answer» B. parallel combination | |
| 313. |
If the resistance of an electric bulb is 500 Ω and voltage across its ends is 250 V then power consumed by it is |
| A. | 130 W |
| B. | 125 W |
| C. | 120 W |
| D. | 200 W |
| Answer» C. 120 W | |
| 314. |
Signals falling on the transmission antenna oscillate the charges which then emit the electrical signals in the form of |
| A. | electric current |
| B. | electromagnet radio waves |
| C. | light waves |
| D. | sound waves |
| Answer» C. light waves | |
| 315. |
A software that manages computer and devices connected to it is |
| A. | Operating system |
| B. | Random access memory (RAM) |
| C. | Read only memory (ROM) |
| D. | all of above |
| Answer» B. Random access memory (RAM) | |
| 316. |
Sound waves produced at the radio station through microphone changed into |
| A. | electrical signals |
| B. | heat waves |
| C. | light waves |
| D. | sound waves |
| Answer» B. heat waves | |
| 317. |
Information sent by cell phones are in the form of |
| A. | electrical signals |
| B. | binary data |
| C. | microwaves |
| D. | electromagnetic waves |
| Answer» E. | |
| 318. |
It takes the output signal from the transmission channel and delivers it to the transducer after processing it |
| A. | transmitter |
| B. | transmission channel |
| C. | receiver |
| D. | hardware |
| Answer» D. hardware | |
| 319. |
Telephones send information through wires in the form of |
| A. | electrical signals |
| B. | radio signals |
| C. | microwaves |
| D. | none of above |
| Answer» B. radio signals | |
| 320. |
The number of processors in supercomputer are |
| A. | 1 |
| B. | 2 |
| C. | 0 |
| D. | it has many processors |
| Answer» E. | |
| 321. |
1 kB is equal to |
| A. | 1024 bytes |
| B. | 1250 bytes |
| C. | 1524 bytes |
| D. | 1169 bytes |
| Answer» B. 1250 bytes | |
| 322. |
The set of instructions and rules to design and use information system are called |
| A. | software |
| B. | data |
| C. | hardware |
| D. | procedures |
| Answer» E. | |
| 323. |
As per Coulomb's law, the force of attraction or repulsion between two point charges is inversely proportional to the |
| A. | sum of the magnitude of charges |
| B. | square of the distance between them |
| C. | product of the magnitude of charges |
| D. | cube of the distance |
| Answer» C. product of the magnitude of charges | |
| 324. |
The amount of work done in bringing unit positive charge from infinity to a point in electric field is called |
| A. | coulomb's force |
| B. | electrostatic force |
| C. | electric potential |
| D. | resistance |
| Answer» D. resistance | |
| 325. |
If the body is positively or negatively charged the leaves of electroscope will |
| A. | diverge |
| B. | converge |
| C. | stay still |
| D. | shrink |
| Answer» B. converge | |
| 326. |
Electric intensity being a force is a |
| A. | unmeasurable quantity |
| B. | vector quantity |
| C. | scalar quantity |
| D. | basic quantity |
| Answer» C. scalar quantity | |
| 327. |
Plastic rod rubbed with fur and glass rod rubbed with silk |
| A. | repel each other |
| B. | mix up with each other |
| C. | attract each other |
| D. | none of above |
| Answer» D. none of above | |
| 328. |
If the test charge is free to move, it will always move in the direction of |
| A. | electric field intensity |
| B. | electric field industry |
| C. | electric field |
| D. | electric shock |
| Answer» B. electric field industry | |
| 329. |
A negative charge |
| A. | repels neutral charge |
| B. | attracts neutral charge |
| C. | repels negative charge |
| D. | repel positive charge |
| Answer» D. repel positive charge | |
| 330. |
The capacitors which use chemical reactions to store charge are called |
| A. | ceramic capacitors |
| B. | fixed capacitors |
| C. | parallel plate capacitors |
| D. | electrolytic capacitors |
| Answer» E. | |
| 331. |
Capacitor plates are separated by an insulator known as |
| A. | non-metal |
| B. | dielectric |
| C. | paper |
| D. | wood |
| Answer» C. paper | |
| 332. |
To paint new cars automobile workers use |
| A. | current electricity |
| B. | static electricity |
| C. | capacitor |
| D. | inductor |
| Answer» C. capacitor | |
| 333. |
The capacitor which has a dielectric between its plates and is made of a flexible material that can be rolled into the shape of a cylinder is called |
| A. | ceramic capacitors |
| B. | fixed capacitors |
| C. | parallel plate capacitors |
| D. | electrolytic capacitors |
| Answer» B. fixed capacitors | |
| 334. |
Electroscope can be charged by |
| A. | convection |
| B. | radiation |
| C. | conduction |
| D. | all of above |
| Answer» D. all of above | |
| 335. |
3 capacitors with capacitances 5µ F, 6µ F and 7µ F are arranged in series combination with a battery of 5V, as 1µ F = 10-6F, the quantity of charge on each plate of the capacitor is |
| A. | 2.5µC |
| B. | 1.96µC |
| C. | 3.6µC |
| D. | 2.89µC |
| Answer» C. 3.6µC | |
| 336. |
A sensitive instrument for detecting charges is called |
| A. | gold leaf electroscope |
| B. | telescope |
| C. | compound microscope |
| D. | chemical electroscope |
| Answer» B. telescope | |
| 337. |
The amount of work done in bringing a unit positive charge from infinity to the point in an electric field is termed as |
| A. | electric field industry |
| B. | electric field |
| C. | electric potential |
| D. | electric field intensity |
| Answer» D. electric field intensity | |
| 338. |
The force between two bodies having charges 500μC and 100μC separated by a distance of 0.5m in the air is |
| A. | 1800 N |
| B. | 1000 N |
| C. | 2200 N |
| D. | 300 N |
| Answer» B. 1000 N | |
| 339. |
What would be the energy supplied by the charge if a point charge of +2 is transferred from a point at potential 100V to a point at potential 50V? |
| A. | 50 J |
| B. | 100 J |
| C. | 200 J |
| D. | 250 J |
| Answer» C. 200 J | |
| 340. |
A negative electric charge |
| A. | attracts other negative charge |
| B. | repels other negative charge |
| C. | attracts a neutral charge |
| D. | repels a neutral charge |
| Answer» C. attracts a neutral charge | |
| 341. |
The superior type of capacitor and used in vast ranges of application is |
| A. | ceramic capacitors |
| B. | fixed capacitors |
| C. | parallel plate capacitors |
| D. | electrolytic capacitors |
| Answer» B. fixed capacitors | |
| 342. |
If the voltage across the capacitor is 15V, the potential difference between its plates is |
| A. | 7.5V |
| B. | 15V |
| C. | 25V |
| D. | 10V |
| Answer» C. 25V | |
| 343. |
The capacitor capacitance can be increased or decreased by |
| A. | turning the rotatable plates in or out |
| B. | sliding the plates |
| C. | changing the plates |
| D. | changing the nature of plates |
| Answer» B. sliding the plates | |
| 344. |
SI unit of electric intensity is |
| A. | C-1 |
| B. | N-1 |
| C. | NC-1 |
| D. | NC-4 |
| Answer» D. NC-4 | |
| 345. |
If 0.8 N is the force of repulsion between two identical charges and the charges are 0.1 m apart. The value of each charge will be |
| A. | 8.4 × 10-7 |
| B. | 6.4 × 10-7 |
| C. | 9.4 × 10-7 |
| D. | 7.4 × 10-7 |
| Answer» D. 7.4 × 10-7 | |
| 346. |
Software is referred to as |
| A. | hardware |
| B. | computer programs |
| C. | binary data |
| D. | procedure |
| Answer» C. binary data | |
| 347. |
The parts of primary memory are |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 348. |
Multi-mode cables can send information only over relatively |
| A. | very long distances |
| B. | long distances |
| C. | short distances |
| D. | none of above |
| Answer» D. none of above | |
| 349. |
Unauthorized access to computer systems of another person is called |
| A. | hacking |
| B. | burglary |
| C. | fraud |
| D. | arson |
| Answer» B. burglary | |
| 350. |
An optical fiber with a coating of lower refractive index is a thin strand of high-quality glass that absorbs |
| A. | very huge light |
| B. | no light |
| C. | very little light |
| D. | all of above |
| Answer» D. all of above | |