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.
| 1051. |
Diamond conducts heat due to |
| A. | free electrons |
| B. | strong bonding |
| C. | weak bonding |
| D. | radiation |
| Answer» C. weak bonding | |
| 1052. |
A safety device that is connected in series with the livewire in the circuit to protect the equipment when excess current flows are called |
| A. | neutral wire |
| B. | fuse |
| C. | cable |
| D. | Earth/ground wire |
| Answer» C. cable | |
| 1053. |
In a dry cell, chemical energy changes into |
| A. | heat energy |
| B. | electrical energy |
| C. | atomic energy |
| D. | light energy |
| Answer» C. atomic energy | |
| 1054. |
A large current of the range such as 1A or 10A can be measured through |
| A. | Vernier calipers |
| B. | galvanometer |
| C. | ammeter |
| D. | voltmeter |
| Answer» D. voltmeter | |
| 1055. |
One milliampere (mA) is equal to |
| A. | 10-9A |
| B. | 10-6A |
| C. | 10-3A |
| D. | 10-6A |
| Answer» D. 10-6A | |
| 1056. |
The current supplied to our homes by the power companies is |
| A. | negative current |
| B. | direct current |
| C. | alternative current |
| D. | fixed current |
| Answer» D. fixed current | |
| 1057. |
(Electrical energy/time) is equal to |
| A. | potential difference |
| B. | flow of light |
| C. | flow of heat |
| D. | electric power |
| Answer» E. | |
| 1058. |
SI unit for resistance is |
| A. | farad |
| B. | ampere |
| C. | volt |
| D. | ohm |
| Answer» E. | |
| 1059. |
In a battery, the separation of charges sets up |
| A. | potential difference |
| B. | current |
| C. | charges |
| D. | resistance |
| Answer» B. current | |
| 1060. |
(energy/charge) is equal to |
| A. | conventional current |
| B. | capacity |
| C. | potential difference |
| D. | electromotive force |
| Answer» E. | |
| 1061. |
Only virtual and erect images can be formed by a |
| A. | convex mirror |
| B. | concave mirror |
| C. | silver mirror |
| D. | plane mirror |
| Answer» B. concave mirror | |
| 1062. |
The refractive index of a medium is |
| A. | Speed of light in air to speed of light in vacuum |
| B. | Speed of light in vacuum to speed of light in air |
| C. | focal length to object distance |
| D. | speed of light in the medium x speed of light in the air |
| Answer» B. Speed of light in vacuum to speed of light in air | |
| 1063. |
The focal length is positive for |
| A. | diverging lens |
| B. | converging lens |
| C. | biconcave lens |
| D. | convex lens |
| Answer» C. biconcave lens | |
| 1064. |
Some people can not see distant objects clearly without spectacles. This defect is called |
| A. | accommodation |
| B. | stress |
| C. | farsightedness |
| D. | nearsightedness |
| Answer» E. | |
| 1065. |
The line joining the center of curvature and pole of the spherical mirror is known as |
| A. | center of curvature |
| B. | focal length |
| C. | principal axis |
| D. | vertex |
| Answer» D. vertex | |
| 1066. |
The iris controls |
| A. | the movement of lens |
| B. | the retina |
| C. | lens movement |
| D. | light entering retina |
| Answer» E. | |
| 1067. |
The variation of the focal length of the eye lens to form a sharp image on the retina is called |
| A. | near point |
| B. | far point |
| C. | accommodation |
| D. | hypermetropia |
| Answer» D. hypermetropia | |
| 1068. |
To explore the interior organs of the body for a surgical purpose, we use |
| A. | lenses |
| B. | microscope |
| C. | endoscope |
| D. | light pipe |
| Answer» D. light pipe | |
| 1069. |
The process of blending of light as it passes from air into glass and vice versa is called |
| A. | reflection of light |
| B. | deflection of light |
| C. | defraction of light |
| D. | refraction of light |
| Answer» E. | |
| 1070. |
The cladding is made of glass or plastic of relatively |
| A. | low refractive index |
| B. | no refractive index |
| C. | zero refractive index |
| D. | high refractive index |
| Answer» B. no refractive index | |
| 1071. |
NOT gate is also called |
| A. | multiplier |
| B. | divider |
| C. | inverter |
| D. | converter |
| Answer» D. converter | |
| 1072. |
For thermionic emission, the voltage applied should be of |
| A. | 5 V |
| B. | 7 V |
| C. | 8 V |
| D. | 6 V |
| Answer» E. | |
| 1073. |
When an electron beam passes between two plates, it can be seen that the electrons are deflected towards |
| A. | no plate |
| B. | negative plate |
| C. | positive plate |
| D. | none of above |
| Answer» D. none of above | |
| 1074. |
The number of electrons reaching the screen determines the screen's |
| A. | size |
| B. | brightness |
| C. | frequency |
| D. | amplitude |
| Answer» C. frequency | |
| 1075. |
The purpose of NOT gate is to convert one logic level into the |
| A. | same logic level |
| B. | opposite logic level |
| C. | parallel logic level |
| D. | none of above |
| Answer» C. parallel logic level | |
| 1076. |
The chemical energy of battery changes to |
| A. | mechanical energy |
| B. | kinetic energy |
| C. | potential energy |
| D. | electric potential energy |
| Answer» E. | |
| 1077. |
Electric current can flow freely in |
| A. | conductors |
| B. | insulators |
| C. | semi insulators |
| D. | none of above |
| Answer» C. semi insulators | |
| 1078. |
To pass the maximum current, the ideal galvanometer should have |
| A. | high resistance |
| B. | moderate resistance |
| C. | very low resistance |
| D. | high potential |
| Answer» D. high potential | |
| 1079. |
The resistance of the wire is directly proportional to the |
| A. | cross sectional area of the wire |
| B. | length of the wire |
| C. | wire material's nature |
| D. | all of above |
| Answer» C. wire material's nature | |
| 1080. |
SI unit of current is |
| A. | joule(J) |
| B. | ampere(A) |
| C. | Pascal(Pa) |
| D. | farad(F) |
| Answer» C. Pascal(Pa) | |
| 1081. |
The distance between the optical center and the principal focus is known as |
| A. | principal axis |
| B. | optical center |
| C. | principal focus |
| D. | focal length |
| Answer» E. | |
| 1082. |
For a convex mirror, the focus lies |
| A. | in front of mirror |
| B. | behind the mirror |
| C. | edge of mirror |
| D. | center of mirror |
| Answer» C. edge of mirror | |
| 1083. |
If a ray is traveling from denser to rare medium then increasing the angle of incidence |
| A. | decreases angle of refraction |
| B. | equals angle of refraction |
| C. | increases angle of refraction |
| D. | increases angle of incidence |
| Answer» D. increases angle of incidence | |
| 1084. |
In-camera the distance between lens and film is fixed and is equal to |
| A. | p |
| B. | q |
| C. | focal length |
| D. | principal axis |
| Answer» D. principal axis | |
| 1085. |
The lens which is thick at center and thin at edges is |
| A. | concave lens |
| B. | biconcave lens |
| C. | convex lens |
| D. | biconvex lens |
| Answer» D. biconvex lens | |
| 1086. |
The level of noise recommended in most countries is |
| A. | 30-40 dB |
| B. | 95-100 dB |
| C. | 85-90 dB |
| D. | 75-80 dB |
| Answer» D. 75-80 dB | |
| 1087. |
The characteristic of sound by which we distinguish between shrill and grave sound is |
| A. | frequency |
| B. | loudness |
| C. | pitch |
| D. | quality |
| Answer» D. quality | |
| 1088. |
The reflection of sound is called |
| A. | quality |
| B. | loudness |
| C. | pitch |
| D. | echo |
| Answer» E. | |
| 1089. |
The speed of sound in the air was first accurately measured in |
| A. | 1718 |
| B. | 1728 |
| C. | 1738 |
| D. | 1708 |
| Answer» D. 1708 | |
| 1090. |
The barely audible sound is called |
| A. | 1 bel |
| B. | zero bel |
| C. | 4 bel |
| D. | 2 bel |
| Answer» C. 4 bel | |
| 1091. |
The resistance of a copper wire if it's length is 1 m and its diameter is 2 mm is |
| A. | 5.4 x 10-3 Ω |
| B. | 5 Ω |
| C. | 4 Ω |
| D. | 2 Ω |
| Answer» B. 5 Ω | |
| 1092. |
If the charge passes through a wire is 0.5C then the current of 50 mA will flow in |
| A. | 10 seconds |
| B. | 15 seconds |
| C. | 12 seconds |
| D. | 20 seconds |
| Answer» B. 15 seconds | |
| 1093. |
The current produced by AC generators is |
| A. | alternative current |
| B. | fixed current |
| C. | negative current |
| D. | direct current |
| Answer» B. fixed current | |
| 1094. |
Ohm's law can be defined as |
| A. | V = It |
| B. | V = If |
| C. | V = IR |
| D. | V = I ⁄ R |
| Answer» D. V = I ⁄ R | |
| 1095. |
Electric current has a single path through the circuit in |
| A. | random combination |
| B. | series combination |
| C. | parallel combination |
| D. | circular combination |
| Answer» C. parallel combination | |
| 1096. |
If a transformer is used to supply voltage to a 15 V model train which draws a current of 0.7 A. If the voltage of the A.C source is 210 V, the current in the primary should be |
| A. | 0.04 A |
| B. | 0.05 A |
| C. | 0.03 A |
| D. | 0.02 A |
| Answer» C. 0.03 A | |
| 1097. |
If the coil is placed perpendicular to field lines then the number of lines passing through the coil is |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | may be max. or min. |
| Answer» C. zero | |
| 1098. |
The loop in magnetic field rotates due to |
| A. | Electromotive force (EMF) |
| B. | frequency |
| C. | resistance |
| D. | torque |
| Answer» E. | |
| 1099. |
A device that converts electric energy into rotational kinetic energy is called |
| A. | circuit breaker |
| B. | transformer |
| C. | generator |
| D. | electric motor |
| Answer» E. | |
| 1100. |
If the secondary voltage is smaller than the primary voltage, the transformer is called a |
| A. | positive transformer |
| B. | step-up transformer |
| C. | negative transformer |
| D. | step-down transformer |
| Answer» E. | |