MCQOPTIONS
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MCQOPTIONS
This section includes 488 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Combined capacitance is equal to the |
| A. | sum of all capacitance of capacitors |
| B. | product of all the capacitance |
| C. | difference between the capacitors |
| D. | average capacitance of capacitors |
| Answer» B. product of all the capacitance | |
| 152. |
Current in a circuit if resistance of 15 and potential difference of 3.0 V is applied across it's ends is |
| A. | 1 A |
| B. | 2 A |
| C. | 0.5 A |
| D. | 0.20 A |
| Answer» E. | |
| 153. |
At constant temperature, resistance and cross-sectional area are |
| A. | directly related |
| B. | not related |
| C. | remains constant |
| D. | inversely related |
| Answer» E. | |
| 154. |
If current of 20 mA is passing through op-amp and voltage drop across series resistor is 10 V then value of resistance is |
| A. | 500 |
| B. | 400 |
| C. | 300 |
| D. | 200 |
| Answer» B. 400 | |
| 155. |
Maximum current a battery of e.m.f 3.0 V and internal resistance 1.0 is |
| A. | 4.0 A |
| B. | 5.0 A |
| C. | 3.0 A |
| D. | 30 A |
| Answer» D. 30 A | |
| 156. |
Natural frequency of a guitar string can be changed by changing it's |
| A. | area |
| B. | diameter |
| C. | length |
| D. | stiffness |
| Answer» D. stiffness | |
| 157. |
180 is equal to{{}} |
| A. | 2 rad |
| B. | rad |
| C. | 2rad |
| D. | 4rad |
| Answer» C. 2rad | |
| 158. |
Speed of an object travelling around a circle depends upon |
| A. | angular velocity |
| B. | radius |
| C. | circumference |
| D. | both A and B |
| Answer» E. | |
| 159. |
In order to keep a body moving in a circle, there exists a force on it that is directed toward the center of the circle. This force is known as |
| A. | Centrifugal force |
| B. | Centripetal force |
| C. | Gravitational Force |
| D. | magnetic force |
| Answer» C. Gravitational Force | |
| 160. |
An object moving in a circle of radius r with a constant speed v has a constant acceleration towards the center equal to |
| A. | v r |
| B. | v r |
| C. | v r |
| D. | v r |
| Answer» B. v r | |
| 161. |
Assuming uniform density of the core, the acceleration due to gravity below the Earth's surface is |
| A. | inversely proportional to the square of the distance from the center of the Earth |
| B. | inversely proportional to the distance from the center of the Earth |
| C. | directly proportional to the square of the distance from the center of the Earth |
| D. | directly proportional to the distance from the center of the Earth |
| Answer» E. | |
| 162. |
Acceleration due to gravity on moon is |
| A. | 9.9 m s-2 |
| B. | 9.5 m s-2 |
| C. | 6.1 m s-2 |
| D. | 1.6 m s-2 |
| Answer» E. | |
| 163. |
Speed of stationary waves is |
| A. | $$$1ms^{-1}$$$ |
| B. | $$$2ms^{-1}$$$ |
| C. | $$$3ms^{-1}$$$ |
| D. | zero |
| Answer» E. | |
| 164. |
Frequency of sky waves is |
| A. | less then 3 MHz |
| B. | more than 3 MHz |
| C. | less than 2 MHz |
| D. | exactly 2 MHz |
| Answer» C. less than 2 MHz | |
| 165. |
Stationary waves are also called |
| A. | static waves |
| B. | standing waves |
| C. | progressive waves |
| D. | All of the above |
| Answer» C. progressive waves | |
| 166. |
Velocity of sound waves through any material depends on |
| A. | the material's density d only |
| B. | the material's density d as well as its modulus of elasticity E |
| C. | the material's modulus of elasticity E only |
| D. | neither the material's density d nor its modulus of elasticity E |
| Answer» C. the material's modulus of elasticity E only | |
| 167. |
In FM, frequency of modulated wave varies with |
| A. | amplitude |
| B. | time |
| C. | wavelength |
| D. | energy |
| Answer» C. wavelength | |
| 168. |
If frequency of certain wave is f, then it's velocity is {{}} |
| A. | v = f |
| B. | v = T |
| C. | T2 |
| D. | 1 T2 |
| Answer» B. v = T | |
| 169. |
Oscillations become damped due to |
| A. | normal force |
| B. | friction |
| C. | tangential force |
| D. | parallel force |
| Answer» C. tangential force | |
| 170. |
Unwanted signal that distorts a transmitted signal is called |
| A. | analogue |
| B. | noise |
| C. | digital |
| D. | tuning |
| Answer» C. digital | |
| 171. |
Number of oscillations per unit time is |
| A. | amplitude |
| B. | wavelength |
| C. | frequency |
| D. | period |
| Answer» D. period | |
| 172. |
Number of oscillations per unit time is called |
| A. | wavelength |
| B. | amplitude |
| C. | displacement |
| D. | frequency |
| Answer» E. | |
| 173. |
Average power of all activities of our body is |
| A. | 111 W |
| B. | 113 W |
| C. | 116 W |
| D. | 120 W |
| Answer» D. 120 W | |
| 174. |
In Kundt's dust tube, dust accumulates at |
| A. | nodes |
| B. | antinodes |
| C. | at the end |
| D. | at troughs only |
| Answer» B. antinodes | |
| 175. |
Type of x-rays used to detect break in bone is |
| A. | hard |
| B. | soft |
| C. | both A and B |
| D. | moderate |
| Answer» B. soft | |
| 176. |
Device used to store energy in electrical circuits is |
| A. | resistor |
| B. | inductor |
| C. | capacitor |
| D. | diode |
| Answer» D. diode | |
| 177. |
For a hydrogen atom the electrical force as compared to gravitational force is{{}} |
| A. | 1039 times |
| B. | 10 40 times |
| C. | 10 41 times |
| D. | 10 42 times |
| Answer» B. 10 40 times | |
| 178. |
In order to slip one surface over another, maximum frictional force has to be overcome, this maximum frictional force between the two surfaces is also known as |
| A. | kinetic frictional force |
| B. | maximal frictional force |
| C. | limiting frictional force |
| D. | resisting force |
| Answer» D. resisting force | |
| 179. |
A measurement which on repetition gives same or nearly same result is called |
| A. | accurate measurement |
| B. | average measurement |
| C. | precise measurement |
| D. | estimated measurement |
| Answer» D. estimated measurement | |
| 180. |
If an object moves back and forth repeatedly around a mean position it is called |
| A. | oscillating |
| B. | revolving |
| C. | rotating |
| D. | motion |
| Answer» B. revolving | |
| 181. |
An instrument commonly used for the measurement of atmospheric pressure is known as |
| A. | Manometer |
| B. | Barometer |
| C. | Calorimeter |
| D. | Potentiometer |
| Answer» C. Calorimeter | |
| 182. |
Spreading of wave as it passes through a gap or around an edge is called |
| A. | reflection |
| B. | refraction |
| C. | diffraction |
| D. | superposition |
| Answer» D. superposition | |
| 183. |
At yield point of a copper wire |
| A. | the load hasn't exceeded the elastic limit yet; so, Hooke's law applies |
| B. | the load has already exceeded the elastic limit and the material has become plastic |
| C. | even the plastic stage has passed and the wire has snapped already |
| D. | Like Brass and Bronze, Copper has no yield point |
| Answer» C. even the plastic stage has passed and the wire has snapped already | |
| 184. |
Most appropriate instrument for measurement of internal and external diameter of a tube is |
| A. | vernier callipers |
| B. | micrometer screw gauge |
| C. | meter rule |
| D. | measuring tape |
| Answer» B. micrometer screw gauge | |
| 185. |
In linear motion, the energy is given by 1 2mv 2. Similarly, in rotational motion, the rotational energy is given by {{}} |
| A. | 1/2 I ; where I: moment of inertia of the body, : angular velocity |
| B. | 1/2 I ; where I: moment of inertia of the body, : angular velocity |
| C. | 1/2 I ; where I: moment of inertia of the body, : angular velocity |
| D. | 1/2 I ; where I: moment of inertia of the body, : angular velocity |
| Answer» D. 1/2 I ; where I: moment of inertia of the body, : angular velocity | |
| 186. |
Due to energy dissipation by viscous forces in air, if simple harmonic variations of a pendulum die away after some time, then oscillation is said to be: |
| A. | undamped |
| B. | free |
| C. | damped |
| D. | dependent |
| Answer» D. dependent | |
| 187. |
Oscillatory motion has a |
| A. | straight lined graph |
| B. | randomly lined graph |
| C. | sinusoidal graph |
| D. | asymptotic graph |
| Answer» D. asymptotic graph | |
| 188. |
In a perfectly elastic collision, momentum and energy are |
| A. | not conserved |
| B. | conserved |
| C. | becomes zero after collision |
| D. | equal before collision |
| Answer» C. becomes zero after collision | |
| 189. |
In Fleming's left hand rule, thumb shows direction of |
| A. | current |
| B. | field |
| C. | motion |
| D. | charge |
| Answer» D. charge | |
| 190. |
Binary system has base |
| A. | 10 |
| B. | 11 |
| C. | 1 |
| D. | 2 |
| Answer» E. | |
| 191. |
In inverting amplifier, the phase difference between input and output voltages must be |
| A. | 30 |
| B. | 45 |
| C. | 90 |
| D. | 180 |
| Answer» E. | |
| 192. |
Electrical force exerted by two point charges on each other is inversely proportional to |
| A. | sum of their charges |
| B. | product of their charges |
| C. | distance between them |
| D. | square of distance between them |
| Answer» E. | |
| 193. |
Liquid A and liquid B exert same amount of pressure on each other, but the density of A is twice the density of B. The height of liquid B is 10 cm, then the height of liquid A would be |
| A. | 5 cm |
| B. | 10 cm |
| C. | 20 cm |
| D. | 40 cm |
| Answer» B. 10 cm | |
| 194. |
Number of conduction electrons per unit volume is |
| A. | electron number |
| B. | number density |
| C. | proton number |
| D. | neutron number |
| Answer» C. proton number | |
| 195. |
Graph of alternating current is a |
| A. | cos wave |
| B. | tan wave |
| C. | curve |
| D. | sine wave |
| Answer» E. | |
| 196. |
Semiconductors have electron number density of order{{}} |
| A. | 10 24 m-3 |
| B. | 10 20 m-3 |
| C. | 10 12 m-3 |
| D. | 10 23 m-3 |
| Answer» E. | |
| 197. |
Number density for copper is {{}} |
| A. | 10-29 m-3 |
| B. | 10 30 m-3 |
| C. | 10 29 m-3 |
| D. | 10 20 m-3 |
| Answer» D. 10 20 m-3 | |
| 198. |
Total number of magnetic field lines passing through an area is called |
| A. | magnetic flux density |
| B. | magnetic flux |
| C. | e.m.f |
| D. | voltage |
| Answer» C. e.m.f | |
| 199. |
Displacement-time graph depicting an oscillatory motion is |
| A. | cos curve |
| B. | sine curve |
| C. | tangent curve |
| D. | straight line |
| Answer» C. tangent curve | |
| 200. |
Highest point on AC graph is known as |
| A. | peak value |
| B. | amplitude |
| C. | frequency |
| D. | wave front |
| Answer» B. amplitude | |