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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.
| 851. |
The relationship between object distance (p), image distance (q) from the mirror and focal length (f) of the mirror is known as |
| A. | glass formula |
| B. | mirror formula |
| C. | speed formula |
| D. | energy formula |
| Answer» C. speed formula | |
| 852. |
The entire light is reflected into the denser medium, which is called total |
| A. | internal reflection of light |
| B. | external reflection of light |
| C. | internal refraction of light |
| D. | external refraction of light |
| Answer» B. external reflection of light | |
| 853. |
The relation between the object and image distance from the lens in terms of the focal length of the lens is called |
| A. | fiber optics |
| B. | lens formula |
| C. | ohm's law |
| D. | optical law |
| Answer» C. ohm's law | |
| 854. |
If the object is towards the left side of the lens, the object distance will be |
| A. | zero |
| B. | constant |
| C. | positive |
| D. | negative |
| Answer» D. negative | |
| 855. |
A girl 1.8 m tall is standing 2.8 m in front of a camera which is using a convex lens having a focal length of 0.04 m. The image is |
| A. | not formed |
| B. | real |
| C. | virtual |
| D. | fake image |
| Answer» C. virtual | |
| 856. |
To convert voices into electrical signals, modern telephone uses |
| A. | graphite |
| B. | plates |
| C. | diaphragm |
| D. | lead |
| Answer» D. lead | |
| 857. |
Data storage devices are |
| A. | random access memory (RAM) |
| B. | read only memory (ROM) |
| C. | secondly memory |
| D. | primary memory |
| Answer» D. primary memory | |
| 858. |
Spiral tracks coded on the surface of CD are called |
| A. | land |
| B. | pits |
| C. | tracks |
| D. | lines |
| Answer» C. tracks | |
| 859. |
Any crime accomplished through knowledge or use of computer technology is known as |
| A. | crime abroad |
| B. | property crime |
| C. | computer crime |
| D. | hate crime |
| Answer» D. hate crime | |
| 860. |
The vibration of the diaphragm produces |
| A. | heat waves |
| B. | light waves |
| C. | sound waves |
| D. | electric current |
| Answer» D. electric current | |
| 861. |
In nuclear fusion, as compared to the masses of original nuclei, the final nucleus is always |
| A. | equal |
| B. | more |
| C. | less |
| D. | zero |
| Answer» D. zero | |
| 862. |
The rate of radioactive decay is proportional to |
| A. | nature of rays |
| B. | no. of electron |
| C. | no. of protons |
| D. | no. of unstable nuclei |
| Answer» E. | |
| 863. |
During the second half-life, the original material is decayed |
| A. | one quarter |
| B. | two quarter |
| C. | three quarter |
| D. | all of above |
| Answer» D. all of above | |
| 864. |
The rate of radioactive decay is proportional to the number of |
| A. | unstable nuclei |
| B. | unstable protons |
| C. | unstable electrons |
| D. | unstable atoms |
| Answer» B. unstable protons | |
| 865. |
The artificially produced radioactive elements are known as |
| A. | ions |
| B. | radiant |
| C. | radioisotopes |
| D. | transmutations |
| Answer» D. transmutations | |
| 866. |
The technique used to locate underwater depths or locating objects lying deep on the ocean floor is called |
| A. | FIBER |
| B. | SONEX |
| C. | SONAR |
| D. | VIBEX |
| Answer» D. VIBEX | |
| 867. |
The characteristic of sound by which we distinguish between two sounds of same loudness and pitch is |
| A. | quality |
| B. | loudness |
| C. | frequency |
| D. | pitch |
| Answer» B. loudness | |
| 868. |
If the intensity of rustle leaves is 10-11 Wm-2 then intensity level due to rustling is |
| A. | 10dB |
| B. | 11dB |
| C. | 100dB |
| D. | 50dB |
| Answer» B. 11dB | |
| 869. |
The loudest animal sound ever recorded is of |
| A. | elephant |
| B. | blue whale |
| C. | shark |
| D. | seal |
| Answer» C. shark | |
| 870. |
A boy clapped his hands near a cliff and heard the echo 3 s later. If the speed of the sound is 346 ms-1, then the distance of the cliff from the boy is |
| A. | 345 m |
| B. | 289 m |
| C. | 519 m |
| D. | 600 m |
| Answer» D. 600 m | |
| 871. |
If speed is 180 ms-1 and frequency is 200 Hz, The wavelength should be |
| A. | 0.9 m |
| B. | 0.5 m |
| C. | 1.2 m |
| D. | 2 m |
| Answer» B. 0.5 m | |
| 872. |
As compare to longitudinal waves, the transverse waves move through solids at a speed of |
| A. | less than half |
| B. | less than one |
| C. | half |
| D. | less than quarter |
| Answer» B. less than one | |
| 873. |
To produce both transverse and longitudinal waves, we can use a |
| A. | string |
| B. | helical spring |
| C. | ripple tank |
| D. | tuning fork |
| Answer» C. ripple tank | |
| 874. |
The restoring force pushes or pulls the oscillatory object |
| A. | Towards mean position |
| B. | Away from mean position |
| C. | at central point |
| D. | extreme point |
| Answer» B. Away from mean position | |
| 875. |
The maximum displacement from the mean position of a body performing simple harmonic mean is called |
| A. | time period |
| B. | amplitude |
| C. | frequency |
| D. | wave length |
| Answer» C. frequency | |
| 876. |
In a simple pendulum, the force acting along the string is |
| A. | 0 |
| B. | mg sinθ |
| C. | mg cosθ |
| D. | 1 |
| Answer» B. mg sinθ | |
| 877. |
The mechanical waves in which particles of the medium vibrate about their mean position along the direction of propagation of the waves are called |
| A. | transverse waves |
| B. | longitudinal waves |
| C. | mechanical waves |
| D. | electromagnetic waves |
| Answer» C. mechanical waves | |
| 878. |
The time period of a simple pendulum is independent of it's |
| A. | length |
| B. | friction |
| C. | gravity |
| D. | mass and amplitude |
| Answer» E. | |
| 879. |
The kinetic energy of mass attached to spring at extreme position is |
| A. | minimum |
| B. | Maximum |
| C. | moderate |
| D. | zero |
| Answer» E. | |
| 880. |
The velocity of bob in SHM becomes zero at |
| A. | mean position |
| B. | in air |
| C. | extreme position |
| D. | middle of mean and extreme position |
| Answer» D. middle of mean and extreme position | |
| 881. |
The categories of waves are |
| A. | 3 |
| B. | 4 |
| C. | 2 |
| D. | 5 |
| Answer» D. 5 | |
| 882. |
Oscillations are damped due to the presence of |
| A. | linear motion |
| B. | restoring force |
| C. | frictional force |
| D. | mechanical force |
| Answer» D. mechanical force | |
| 883. |
If the time period of a simple pendulum is 2 s then it's length is |
| A. | 1.02m |
| B. | 1.2m |
| C. | 1.4m |
| D. | 1.5m |
| Answer» B. 1.2m | |
| 884. |
If potential energies and kinetic energies are equal then displacement of an object in SHM is |
| A. | 4 |
| B. | 0 |
| C. | 2 |
| D. | 6 |
| Answer» C. 2 | |
| 885. |
The relationship between speed (v), frequency (f) and wavelength (λ) is |
| A. | vf = λ |
| B. | fλ = v |
| C. | v&lambda = f |
| D. | v = λ/f |
| Answer» C. v&lambda = f | |
| 886. |
By reducing the current through the cable, power loss in the form of heat dissipation can be |
| A. | increased |
| B. | reduced |
| C. | constant |
| D. | none of above |
| Answer» C. constant | |
| 887. |
The direction of induced current in a circuit is always such that it opposes the cause that produces it. This law was introduced by |
| A. | Faraday |
| B. | Lenz |
| C. | Fleming |
| D. | Johns Burge |
| Answer» C. Fleming | |
| 888. |
The direction of induced Electromotive force (EMF) in a circuit is under the law of conservation of |
| A. | mass |
| B. | charge |
| C. | energy |
| D. | momentum |
| Answer» D. momentum | |
| 889. |
Through a conductor, an electric current produces a |
| A. | mechanical energy |
| B. | magnetism |
| C. | potential difference |
| D. | magnetic field |
| Answer» E. | |
| 890. |
The power is transmitted over long distances at high voltage to minimize the |
| A. | loss of energy |
| B. | loss of air |
| C. | loss of light |
| D. | cost |
| Answer» B. loss of air | |
| 891. |
The release of energy from the sun is due to |
| A. | nuclear fission |
| B. | nuclear fusion |
| C. | burning of gases |
| D. | chemical reaction |
| Answer» C. burning of gases | |
| 892. |
Ashes from a fire in the forest show carbon-14 activity of only 1/8 the activity of fresh wood. How long ago the forest had fire? |
| A. | 18590 years |
| B. | 17190 years |
| C. | 16580 years |
| D. | 14820 years |
| Answer» C. 16580 years | |
| 893. |
The temperature at the center of the Sun is nearly |
| A. | 20 million Kelvin |
| B. | 10 million Kelvin |
| C. | 30 million Kelvin |
| D. | 25 million Kelvin |
| Answer» B. 10 million Kelvin | |
| 894. |
Times a proton is heavier than an electron is |
| A. | 1827 |
| B. | 1876 |
| C. | 1836 |
| D. | 1789 |
| Answer» D. 1789 | |
| 895. |
Nucleons are a collection of |
| A. | electrons and protons |
| B. | electrons and neutrons |
| C. | protons and neutrons |
| D. | protons and positrons |
| Answer» D. protons and positrons | |
| 896. |
The endoscope used to examine the bladder is called |
| A. | cystoscope |
| B. | gastro-scope |
| C. | microscope |
| D. | bronchoscope |
| Answer» B. gastro-scope | |
| 897. |
In a simple lens camera, the distance between lens and film is |
| A. | fixed |
| B. | variable |
| C. | always zero |
| D. | always 5 cm |
| Answer» B. variable | |
| 898. |
For a virtual image made on the right side of the lens by a real object, the image distance is |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | constant |
| Answer» C. zero | |
| 899. |
Both virtual and real images can be formed by a |
| A. | plane mirror |
| B. | convex mirror |
| C. | concave mirror |
| D. | silver mirror |
| Answer» D. silver mirror | |
| 900. |
Which of the following is used in fiber optics? |
| A. | total internal reflection of light |
| B. | total external reflection of light |
| C. | total internal refraction of light |
| D. | total external refraction of light |
| Answer» B. total external reflection of light | |