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.
| 101. |
The time a current of 30 mA takes to deliver 30 C charge is |
| A. | 0.3 s |
| B. | 0.003 s |
| C. | 0.4 s |
| D. | 0.5 s |
| Answer» C. 0.4 s | |
| 102. |
The property of a substance which offers opposition to the flow of current through it is called |
| A. | energy |
| B. | capacity |
| C. | resistance |
| D. | voltage |
| Answer» D. voltage | |
| 103. |
Speed of light in air/speed of light in a medium is equal to the index of |
| A. | defraction |
| B. | acoustics |
| C. | reflection |
| D. | refraction |
| Answer» E. | |
| 104. |
Rough surfaces reflect rays of light in |
| A. | two directions |
| B. | one direction |
| C. | many directions |
| D. | no direction |
| Answer» D. no direction | |
| 105. |
If an object is 14 cm in front of the convex mirror and image distance is 5.8 cm then it's focal length is |
| A. | -20 cm |
| B. | -4.1cm |
| C. | -9.9 cm |
| D. | -8.2 cm |
| Answer» C. -9.9 cm | |
| 106. |
Christian Huygens invented the pendulum clock in |
| A. | 1657 |
| B. | 1670 |
| C. | 1682 |
| D. | 1656 |
| Answer» E. | |
| 107. |
Water waves are |
| A. | electromagnetic |
| B. | longitudinal |
| C. | mechanical |
| D. | chemical |
| Answer» D. chemical | |
| 108. |
A transverse wave produced on a spring has a frequency of 200 Hz and travels along the length of a spring of 80 m in 0.5 seconds. The speed of the wave will be |
| A. | 122 ms-1 |
| B. | 140 ms-1 |
| C. | 133 ms-1 |
| D. | 150 ms-1 |
| Answer» D. 150 ms-1 | |
| 109. |
The oscillations of a system in the presence of some resistive force are |
| A. | linear oscillations |
| B. | simple harmonic oscillations |
| C. | damped oscillations |
| D. | random oscillations |
| Answer» D. random oscillations | |
| 110. |
The speed (v) of the wave is equal to the product of frequency and |
| A. | vibration |
| B. | amplitude |
| C. | wavelength |
| D. | time period |
| Answer» D. time period | |
| 111. |
The ability of a capacitor to store charge depends upon |
| A. | area of plates |
| B. | distance between plates |
| C. | type of dielectric used |
| D. | all of above |
| Answer» E. | |
| 112. |
If F is the force acting on the test charge qo, the electric field intensity E would be given by |
| A. | E = F - qo |
| B. | E = F/qo |
| C. | E = F + qo |
| D. | E = qo/F |
| Answer» C. E = F + qo | |
| 113. |
As per Coulomb's law, the force of attraction or repulsion between two point charges is directly 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» D. cube of the distance | |
| 114. |
Coulomb's law is only true for point charges whose sizes are |
| A. | medium |
| B. | very large |
| C. | very small |
| D. | large |
| Answer» D. large | |
| 115. |
To relieve the discomfort of allergy sufferers in homes, we use |
| A. | vacuum cleaner |
| B. | electrostatic air cleaner |
| C. | wind cleaner |
| D. | none of above |
| Answer» C. wind cleaner | |
| 116. |
The elements which emit natural radioactivity are known as |
| A. | radio elements |
| B. | active elements |
| C. | radioactive elements |
| D. | nuclear elements |
| Answer» D. nuclear elements | |
| 117. |
In the nuclide defined by &15&7X, the number of protons and neutrons respectively are |
| A. | 7 and 8 |
| B. | 15 and 7 |
| C. | 8 and 6 |
| D. | 23 and 15 |
| Answer» B. 15 and 7 | |
| 118. |
If a C-14 has a half-life of 5730 years, then how long will it take for the number of C-14 in a sample to drop to 1/8 of initial quantity? |
| A. | 2.58 × 104 years |
| B. | 1.44 × 104 years |
| C. | 1.72 × 104 years |
| D. | 2.58 × 104 years |
| Answer» D. 2.58 × 104 years | |
| 119. |
When two light nuclei combine to form a heavier nucleus, the process is said to be |
| A. | nuclear fission |
| B. | nuclear fusion |
| C. | nuclear power |
| D. | nuclear transmutation |
| Answer» C. nuclear power | |
| 120. |
Alpha (α) particles are helium (He) nucleus with a charge of |
| A. | e |
| B. | 2e |
| C. | 3e |
| D. | 4e |
| Answer» C. 3e | |
| 121. |
When light travelling in a certain medium falls on the surface of another medium, a part of it turns back in the same medium. This phenomenon is called |
| A. | reflection |
| B. | refraction |
| C. | diffraction |
| D. | acoustics |
| Answer» B. refraction | |
| 122. |
In concave mirror, the size of image depends upon |
| A. | size of object |
| B. | position of object |
| C. | area covered by object |
| D. | shape of object |
| Answer» C. area covered by object | |
| 123. |
The variation of focal length to form a sharp image on retina is called |
| A. | accommodation |
| B. | aperture |
| C. | retina control |
| D. | Sutter |
| Answer» B. aperture | |
| 124. |
The lens with a long focal length is |
| A. | not strongly curved only |
| B. | thin only |
| C. | thick |
| D. | not strongly curved and thin |
| Answer» E. | |
| 125. |
Find the focal length of the mirror that forms an image 6.2 cm behind the mirror of an object placed at 26 cm in front of the mirror? |
| A. | −6.58 cm |
| B. | −8.41 cm |
| C. | −7.8 cm |
| D. | −9.6 cm |
| Answer» C. −7.8 cm | |
| 126. |
As per Ohm's law, V (potential difference) is equal to |
| A. | I(current)×R(resistance of the conductors) |
| B. | I(current)/R(resistance of the conductors) |
| C. | R(resistance of the conductors)/I(current) |
| D. | I(current) + R(resistance of the conductors) |
| Answer» B. I(current)/R(resistance of the conductors) | |
| 127. |
The device that disconnects the supply automatically if current exceeds the normal value is known as |
| A. | circuit breaker |
| B. | fuse |
| C. | cable |
| D. | capacitor |
| Answer» B. fuse | |
| 128. |
As compare to short wires, long wires have |
| A. | more resistance |
| B. | no resistance |
| C. | less resistance |
| D. | same resistance |
| Answer» B. no resistance | |
| 129. |
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 total power produced by the battery is |
| A. | 2 W |
| B. | 3 W |
| C. | 5 W |
| D. | 6 W |
| Answer» B. 3 W | |
| 130. |
Substances that have constant resistance over a wide range of voltages are |
| A. | ohmic |
| B. | non ohmic |
| C. | resistive |
| D. | non resistive |
| Answer» B. non ohmic | |
| 131. |
Waves which require medium for propagation are |
| A. | electromagnetic |
| B. | mechanical |
| C. | transverse |
| D. | longitudinal |
| Answer» C. transverse | |
| 132. |
In Hooke's Law, F = -k x, the constant k is called the |
| A. | velocity |
| B. | speed constant |
| C. | spring constant |
| D. | time |
| Answer» D. time | |
| 133. |
X-ray waves, television waves and radio waves are the examples of |
| A. | mechanical waves |
| B. | transverse waves |
| C. | longitudinal waves |
| D. | electromagnetic waves |
| Answer» E. | |
| 134. |
In SHM of a simple pendulum, the component of weight which is directed towards mean position is |
| A. | mg cosθ |
| B. | mg sinθ |
| C. | mg tanθ |
| D. | none of above |
| Answer» C. mg tanθ | |
| 135. |
Another term is used for vibration called |
| A. | association |
| B. | motion |
| C. | oscillation |
| D. | floatation |
| Answer» D. floatation | |
| 136. |
Such things which can have only two possible states are known as |
| A. | secondary variables |
| B. | primary variables |
| C. | binary variables |
| D. | linear variables |
| Answer» D. linear variables | |
| 137. |
In AND operation if any one of logic input is at '0' then output is |
| A. | 1 |
| B. | 0 |
| C. | 2 |
| D. | 4 |
| Answer» C. 2 | |
| 138. |
To investigate the properties of electron beam, we use |
| A. | proton gun |
| B. | bullet gun |
| C. | voltage gun |
| D. | electron gun |
| Answer» E. | |
| 139. |
The quantities whose values vary in non-continuous manner are |
| A. | analogue |
| B. | digital |
| C. | scalar |
| D. | vector |
| Answer» C. scalar | |
| 140. |
A circuit which implements AND operation is |
| A. | AND gate |
| B. | OR gate |
| C. | NOT gate |
| D. | NOR gate |
| Answer» B. OR gate | |
| 141. |
In transformer the changing current in primary coil induces changing magnetic field in |
| A. | resistor |
| B. | inductor |
| C. | insulator |
| D. | secondary coil |
| Answer» E. | |
| 142. |
A transformer is designed to convert the voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. The turns on its secondary coil should be |
| A. | 100 |
| B. | 200 |
| C. | 120 |
| D. | 480 |
| Answer» C. 120 | |
| 143. |
Electric motors works on the principle of |
| A. | capacitors |
| B. | friction |
| C. | couple |
| D. | torque |
| Answer» E. | |
| 144. |
Weak ionic current in our body that travels along the nerve can produce the |
| A. | atoms |
| B. | heat |
| C. | potential difference |
| D. | magnetic effect |
| Answer» E. | |
| 145. |
In a transformer, the primary coil is connected to |
| A. | Alternating current (AC) source |
| B. | Direct current (DC) source |
| C. | resistor |
| D. | inductor |
| Answer» B. Direct current (DC) source | |
| 146. |
A compact disc (CD) can store computer's data over |
| A. | 420 megabytes |
| B. | 380 megabytes |
| C. | 680 megabytes |
| D. | 560 megabytes |
| Answer» D. 560 megabytes | |
| 147. |
The number of operating computers on internet is |
| A. | nearly 10 million |
| B. | nearly 20 million |
| C. | more than 50 million |
| D. | 30 million |
| Answer» D. 30 million | |
| 148. |
In radio, television and cell phone information is sent either through space in the form of |
| A. | cathode rays |
| B. | electric signals |
| C. | light |
| D. | electromagnet waves |
| Answer» E. | |
| 149. |
The educational institutions, libraries, hospitals, and industries store the concerned information by |
| A. | operating system |
| B. | word processing |
| C. | data management |
| D. | informing system |
| Answer» D. informing system | |
| 150. |
The medium which sends the signal from source to destination is known as |
| A. | transmitter |
| B. | transmission channel |
| C. | receiver |
| D. | hardware |
| Answer» C. receiver | |