MCQOPTIONS
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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.
| 351. |
The speed of sound in air is just |
| A. | 1158 km per hour |
| B. | 1349 km per hour |
| C. | 1200 km per hour |
| D. | 1246 km per hour |
| Answer» E. | |
| 352. |
The parts of the computer that you can see and touch are called |
| A. | hardware |
| B. | software |
| C. | data |
| D. | procedures |
| Answer» B. software | |
| 353. |
The facts and figures that are used by the programs to produce useful information are called |
| A. | software |
| B. | data |
| C. | hardware |
| D. | procedures |
| Answer» C. hardware | |
| 354. |
A wireless communication station set up at a particular geographical location is called |
| A. | base station |
| B. | fax station |
| C. | computer station |
| D. | phone station |
| Answer» B. fax station | |
| 355. |
To collect all information regarding a subject for any purpose and to store them in the computer more than one interlinked files which may help when needed, is known as |
| A. | operating system |
| B. | word processing |
| C. | data management |
| D. | informing system |
| Answer» D. informing system | |
| 356. |
The total distance covered by the sound from the point of generation to the reflecting surface and back should be at least |
| A. | 30 m |
| B. | 34 m |
| C. | 40 m |
| D. | 38 m |
| Answer» C. 40 m | |
| 357. |
The sound produced by a large drum is louder than a small drum because of its |
| A. | distance from sticks |
| B. | small vibrating area |
| C. | large vibrating area |
| D. | none of above |
| Answer» D. none of above | |
| 358. |
If the speed of sound in air is 330 ms-1 and the wavelength is 10 cm. The frequency of sound should be |
| A. | 3.9×103 Hz |
| B. | 4.7×103 Hz |
| C. | 3.3×103 Hz |
| D. | 5.3×103 Hz |
| Answer» D. 5.3×103 Hz | |
| 359. |
Sound which has Jarring effect on ears is |
| A. | Noise |
| B. | Music |
| C. | pleasant sound |
| D. | soul music |
| Answer» B. Music | |
| 360. |
Frequency of tuning fork depends on |
| A. | mass of its prongs |
| B. | area of its prongs |
| C. | stiffness of its prongs |
| D. | density of its prongs |
| Answer» B. area of its prongs | |
| 361. |
In the fiber-optic thread, the refractive index of the inner core is |
| A. | less than cladding |
| B. | equal to cladding |
| C. | higher than cladding |
| D. | all of above |
| Answer» D. all of above | |
| 362. |
The distance from the pole to the principal focus measured along the |
| A. | center of curvature |
| B. | principal axis |
| C. | vertex |
| D. | radius of curvature |
| Answer» C. vertex | |
| 363. |
An object 20 cm tall is located 14 cm from a concave mirror having focal length 20 cm. The image is located at |
| A. | 30 cm |
| B. | 46.7 cm |
| C. | 35.6 cm |
| D. | 32.5 cm |
| Answer» C. 35.6 cm | |
| 364. |
The endoscope used to examine the stomach is called |
| A. | cystoscope |
| B. | gastro-scope |
| C. | microscope |
| D. | bronchoscope |
| Answer» C. microscope | |
| 365. |
The short-sightedness can be corrected if |
| A. | converging glasses are used |
| B. | converging mirror is used |
| C. | diverging mirror is used |
| D. | diverging glasses is used |
| Answer» E. | |
| 366. |
The expression for Hooke's law is |
| A. | F = ma |
| B. | F = -kx |
| C. | F = vl |
| D. | F = m1m2 |
| Answer» C. F = vl | |
| 367. |
A simple pendulum completes one vibration in 3 seconds. When g = 10 ms-2, its length will be |
| A. | 1.5 m |
| B. | 2 m |
| C. | 3.2 m |
| D. | 2.28 m |
| Answer» E. | |
| 368. |
If the length of a simple pendulum is doubled then its time will be |
| A. | 2.8π√(l ⁄ g) |
| B. | 2π√g |
| C. | 4π√(l ⁄ g) |
| D. | tripled |
| Answer» B. 2π√g | |
| 369. |
The motion of ceiling fan |
| A. | is SHM |
| B. | isn't SHM |
| C. | Linear |
| D. | quadratic |
| Answer» C. Linear | |
| 370. |
At one end of a ripple tank 90 cm across, a 6Hz vibrator produces waves whose wavelength is 30 mm. The time needed to cross the waves is |
| A. | 3 seconds |
| B. | 7 seconds |
| C. | 10 seconds |
| D. | 5 seconds |
| Answer» E. | |
| 371. |
The echo of sound is more prominent if the surface is |
| A. | soft |
| B. | rigid |
| C. | porous |
| D. | smooth |
| Answer» C. porous | |
| 372. |
A higher pitch means the |
| A. | zero frequency |
| B. | lower frequency |
| C. | higher frequency |
| D. | lower loudness |
| Answer» D. lower loudness | |
| 373. |
A marine survey ship sends a sound wave to the seabed which receives an echo after 2.5 s. The speed of sound in seawater is 1200 ms-1. The depth of the sea is |
| A. | 1200 m |
| B. | 1500 m |
| C. | 750 m |
| D. | 1000 m |
| Answer» C. 750 m | |
| 374. |
A human hearing can not hear a sound of frequency more than |
| A. | 10,000 Hz |
| B. | 20,000 Hz |
| C. | 5,000 Hz |
| D. | 15,000 Hz |
| Answer» E. | |
| 375. |
A sound wave has a frequency of 3 KHz and wavelength 20 cm. How much will it take to travel 2 km? |
| A. | 4.2 s |
| B. | 3.33 s |
| C. | 3.9 s |
| D. | 4.65 s |
| Answer» C. 3.9 s | |
| 376. |
If a copper wire is 2 m long and its diameter is 2 mm, then its resistance should be |
| A. | 2 × 10-2 |
| B. | 0.58 × 10-2 |
| C. | 3.54 × 10-2 |
| D. | 1.07 × 10-2 |
| Answer» E. | |
| 377. |
Materials that obey Ohm's law and hence have a constant resistance over a wide range of voltages are called |
| A. | ohmic |
| B. | non-ohmic |
| C. | batteries |
| D. | capacitors |
| Answer» B. non-ohmic | |
| 378. |
When a circuit with very low resistance is formed, there can be occurred a |
| A. | potential difference |
| B. | short circuit |
| C. | flow of light |
| D. | flow of heat |
| Answer» C. flow of light | |
| 379. |
If the charge Q is passing through an area in time t then, current I flowing through will be |
| A. | I = Q/t |
| B. | I = t/Q |
| C. | I = Q + t |
| D. | I = Q×t |
| Answer» B. I = t/Q | |
| 380. |
Current can not flow through an insulator because they have |
| A. | no free electrons |
| B. | free electrons |
| C. | no free protons |
| D. | free neutrons |
| Answer» B. free electrons | |
| 381. |
Soft iron can be easily |
| A. | magnetized only |
| B. | demagnetized only |
| C. | convert into gas |
| D. | magnetized and demagnetized |
| Answer» E. | |
| 382. |
If a coil is rotated in a magnetic field, there will be induced a |
| A. | current |
| B. | wave |
| C. | friction |
| D. | stress |
| Answer» B. wave | |
| 383. |
The direction of induced current always |
| A. | opposes the cause |
| B. | remains same as that of cause |
| C. | equal to cause that produces it |
| D. | directs the cause |
| Answer» B. remains same as that of cause | |
| 384. |
As per Faraday's law of electromagnetic induction, the value of induced electromotive force in a circuit is directly proportional to the rate of change of the number of |
| A. | potential difference |
| B. | electromagnetic difference |
| C. | magnetic lines of force |
| D. | electromagnetic induction |
| Answer» D. electromagnetic induction | |
| 385. |
The study of magnetic effects of current is called |
| A. | mechanical energy |
| B. | magnetism |
| C. | potential difference |
| D. | electromagnetism |
| Answer» E. | |
| 386. |
By rubbing a neutral body with another neutral body, we can produce |
| A. | heat |
| B. | electric charge |
| C. | light |
| D. | atoms |
| Answer» C. light | |
| 387. |
The major cause of fires and explosions in many places is |
| A. | heat |
| B. | thunderstorm |
| C. | static electricity |
| D. | automobiles |
| Answer» D. automobiles | |
| 388. |
As per coulomb's law, when the distance of separation increases, the attraction of 2 positively charged objects |
| A. | increases |
| B. | decreases |
| C. | remains unchanged |
| D. | can not be determined |
| Answer» D. can not be determined | |
| 389. |
If a charge is moved from lower power potential to higher potential, then energy should be |
| A. | released |
| B. | remains same |
| C. | supplied |
| D. | converted |
| Answer» D. converted | |
| 390. |
A region around a charge in which it exerts an electrostatic force on another charge is called |
| A. | electric field industry |
| B. | electric shock |
| C. | electric path |
| D. | electric field |
| Answer» E. | |
| 391. |
Due to a large quantity of electric charge which builds up in the heavy thunderclouds, the phenomenon occurs is called |
| A. | rain |
| B. | storm |
| C. | heating |
| D. | lightning |
| Answer» E. | |
| 392. |
3 capacitors with capacitances 5µ F, 6µ F and 7µ F are arranged in parallel combination with a battery of 5V, as 1µ F = 10-6F, the quantity of charge on each plate of the capacitor is |
| A. | 25µC, 30µC, 35µC |
| B. | 15µC, 20µC, 25µC |
| C. | 5µC, 10µC, 15µC |
| D. | 45µC, 50µC, 55µC |
| Answer» B. 15µC, 20µC, 25µC | |
| 393. |
The medium between the two plates is air or a sheet of some insulator, such a medium is called |
| A. | capacitor |
| B. | plug |
| C. | dielectric |
| D. | adopter |
| Answer» D. adopter | |
| 394. |
The property of attraction or repulsion between substances is due to the |
| A. | electric charges |
| B. | neutrons |
| C. | atoms |
| D. | capacitors |
| Answer» B. neutrons | |
| 395. |
3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in series combination with a battery of 5V, as 1µF = 10-6F, the voltage across each capacitor is |
| A. | 1.96V, 1.63V, 1.4V |
| B. | 2.1V, 2.5V, 2.8V |
| C. | 0.5V, 0.9V, 0.8V |
| D. | 3.6V, 3.8V, 3.9V |
| Answer» B. 2.1V, 2.5V, 2.8V | |
| 396. |
The property of a substance which offers opposition to flow of current is called |
| A. | friction |
| B. | resistance |
| C. | current |
| D. | Electromotive force (Electromotive force (EMF)) |
| Answer» C. current | |
| 397. |
Electric potential and Electromotive force (EMF) are |
| A. | different terms |
| B. | have different units |
| C. | same terms |
| D. | undefined terms |
| Answer» D. undefined terms | |
| 398. |
A thermistor is used in a circuit that senses |
| A. | current changes |
| B. | voltage changes |
| C. | area changes |
| D. | temperature changes |
| Answer» E. | |
| 399. |
A resistor having resistance 6.2Ω is connected across a battery of 5 V using a wire of negotiable resistance. Current passes through the resistor are 0.4 A. The power dissipated in the resistor is |
| A. | 0.72 W |
| B. | 1.5 W |
| C. | 0.99 W |
| D. | 3 W |
| Answer» D. 3 W | |
| 400. |
Materials having a resistance that changes with voltage or current are called |
| A. | ohmic |
| B. | non-ohmic |
| C. | batteries |
| D. | capacitors |
| Answer» C. batteries | |