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.
| 251. |
For a straight wire, induced current depends upon |
| A. | the speed of movement of wire |
| B. | the length of wire |
| C. | the magnitude of magnetic flux density |
| D. | all of above |
| Answer» E. | |
| 252. |
Induced current in coil by a magnet turns it into an |
| A. | straight wire |
| B. | magnet |
| C. | ammeter |
| D. | electromagnet |
| Answer» E. | |
| 253. |
speed of ultrasound depends upon |
| A. | medium |
| B. | amplitude |
| C. | material |
| D. | wavelength |
| Answer» D. wavelength | |
| 254. |
Unit of luminous intensity is |
| A. | m |
| B. | kg |
| C. | cd |
| D. | mol |
| Answer» D. mol | |
| 255. |
Wavelength of x-rays is in range |
| A. | 10 -8 to 10 -13 m |
| B. | 10 -7 to 10 -14 m |
| C. | 10 -10 to 10 -15 m |
| D. | 10 2 to 10 9 m |
| Answer» B. 10 -7 to 10 -14 m | |
| 256. |
In s.h.m, object's acceleration depends upon |
| A. | displacement from equilibrium position |
| B. | magnitude of restoring force |
| C. | both A and B |
| D. | force exerted on it |
| Answer» D. force exerted on it | |
| 257. |
Intensity of x-rays can be increased by increasing |
| A. | frequency |
| B. | current |
| C. | voltage |
| D. | resistance |
| Answer» C. voltage | |
| 258. |
intensity of sun's radiation is about {{}} |
| A. | 1.0 kW m-2 |
| B. | 20 kW m-2 |
| C. | 5 kW m-2 |
| D. | 8 kW m-2 |
| Answer» B. 20 kW m-2 | |
| 259. |
Wavelength of 2.0 MHz ultrasound waves in tissue is |
| A. | 7.5 10-4 m |
| B. | 8 10-5 m |
| C. | 8.5 10-6 m |
| D. | 9.2 10-3 m |
| Answer» B. 8 10-5 m | |
| 260. |
Wavelength of slow moving neutrons is about |
| A. | 10-34 m |
| B. | 10-20 m |
| C. | 10-19 m |
| D. | 10-10 m |
| Answer» E. | |
| 261. |
Mechanical waves include |
| A. | sound |
| B. | light |
| C. | EM waves |
| D. | UV waves |
| Answer» B. light | |
| 262. |
In a weather map, lines joining all those regions with same atmospheric pressure are called |
| A. | Bars |
| B. | Millibars |
| C. | Isobars |
| D. | Atmospheric bars |
| Answer» D. Atmospheric bars | |
| 263. |
In young double slit experiment, the wavelength of incident beams should be |
| A. | same |
| B. | different |
| C. | zero |
| D. | opposite |
| Answer» B. different | |
| 264. |
Grating element is equal to |
| A. | n /sin |
| B. | n |
| C. | sin |
| D. | cos |
| Answer» B. n | |
| 265. |
Energy of photon is directly related to the |
| A. | wavelength |
| B. | wave number |
| C. | frequency |
| D. | amplitude |
| Answer» D. amplitude | |
| 266. |
1 Tesla is equal to {{}} |
| A. | 50 N A-1 m-1 |
| B. | 100 N A-1 m-1 |
| C. | 1 N A-1 m-1 |
| D. | 1000 N A-1 m-1 |
| Answer» D. 1000 N A-1 m-1 | |
| 267. |
Energy passing through unit area is |
| A. | intensity of x-ray |
| B. | frequency of x-ray |
| C. | wavelength of x-ray |
| D. | amplitude of x-ray |
| Answer» B. frequency of x-ray | |
| 268. |
E.M.F for a coil depends upon |
| A. | the cross sectional area |
| B. | no. of turns of wire |
| C. | the magnitude of magnetic flux density |
| D. | all of above |
| Answer» E. | |
| 269. |
Energy of molecules of any substance is known as |
| A. | kinetic energy |
| B. | potential energy |
| C. | internal energy |
| D. | chemical energy |
| Answer» D. chemical energy | |
| 270. |
Direction of momentum is direction of object's |
| A. | mass |
| B. | acceleration |
| C. | velocity |
| D. | frictional force |
| Answer» D. frictional force | |
| 271. |
Capacitor is fully charged if potential difference is equal to |
| A. | e.m.f |
| B. | current |
| C. | resistance |
| D. | power |
| Answer» B. current | |
| 272. |
If charge stored on plates of capacitor is large, then capacitance will be |
| A. | small |
| B. | large |
| C. | zero |
| D. | infinite |
| Answer» C. zero | |
| 273. |
If the plates of capacitor are oppositely charged then the total charge is equal to |
| A. | negative |
| B. | positive |
| C. | zero |
| D. | infinite |
| Answer» D. infinite | |
| 274. |
Terminal potential difference of battery depends on |
| A. | current |
| B. | temperature |
| C. | both A and B |
| D. | resistance of external resistor |
| Answer» E. | |
| 275. |
Unit for pressure used in weather maps is millibar. 1 millibar is equal to |
| A. | 1000 bar |
| B. | 100 kPa |
| C. | 100 Pa |
| D. | 1 atm |
| Answer» D. 1 atm | |
| 276. |
Longitudinal waves gives rise to |
| A. | amplitude |
| B. | frequency |
| C. | wavelength |
| D. | high and low pressure regions |
| Answer» E. | |
| 277. |
In an electric field, energy per unit positive charge is |
| A. | voltage |
| B. | current |
| C. | frequency |
| D. | resistance |
| Answer» B. current | |
| 278. |
Phase difference is measured in |
| A. | degrees |
| B. | meters |
| C. | seconds |
| D. | newton |
| Answer» B. meters | |
| 279. |
Force provided by breaking system of train if it is decelerating at rate of -3 m s -2 and having mass 10,000 kg is {{}} |
| A. | -30,000 N |
| B. | -40,000 N |
| C. | -50,000 N |
| D. | 30,000 N |
| Answer» B. -40,000 N | |
| 280. |
Normal force exerted per unit area by gas on walls of container is |
| A. | temperature |
| B. | energy |
| C. | pressure |
| D. | friction |
| Answer» D. friction | |
| 281. |
Derived unit Tesla is related to |
| A. | A |
| B. | kg |
| C. | s |
| D. | all of above |
| Answer» E. | |
| 282. |
Speed is unchanged because work done on an object is |
| A. | zero |
| B. | positive |
| C. | negative |
| D. | infinite |
| Answer» B. positive | |
| 283. |
Work done in charging a capacitor is given by |
| A. | (1 2)QV |
| B. | 2QV |
| C. | QV |
| D. | 2V |
| Answer» B. 2QV | |
| 284. |
Weakest force in nature is |
| A. | electric force |
| B. | gravitational force |
| C. | weak force |
| D. | magnetic force |
| Answer» C. weak force | |
| 285. |
Energy required per unit mass of substance to raise temperature of that substance by 1 K is called |
| A. | enthalpy |
| B. | internal energy |
| C. | specific heat capacity |
| D. | temperature |
| Answer» D. temperature | |
| 286. |
Density of proton is equal to density of |
| A. | electron |
| B. | atom |
| C. | neutron |
| D. | neutrino |
| Answer» D. neutrino | |
| 287. |
When field is parallel to plane of area, magnetic flux through coil is |
| A. | zero |
| B. | infinite |
| C. | 2 |
| D. | 5 |
| Answer» B. infinite | |
| 288. |
Acceleration of a rocket having mass 5000 kg and resultant force acting on it is 200,000 N is {{}} |
| A. | 50 m s-2 |
| B. | 56 m s-2 |
| C. | 70 m s-2 |
| D. | 40 m s-2 |
| Answer» E. | |
| 289. |
Force applied on a body and its acceleration are |
| A. | inversely related |
| B. | directly related |
| C. | not related at all |
| D. | inversely proportional |
| Answer» C. not related at all | |
| 290. |
Magnitude of gradient of a-x graph is {{}} |
| A. | |
| B. | 2 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 291. |
For an electron, magnitude of force on it is |
| A. | BeV |
| B. | eV |
| C. | Be |
| D. | BV |
| Answer» B. eV | |
| 292. |
Speed of electromagnetic radiation is independent of |
| A. | wavelength |
| B. | amplitude |
| C. | time period |
| D. | frequency |
| Answer» E. | |
| 293. |
Total amount of mass and energy together in a system is |
| A. | increasing |
| B. | decreasing |
| C. | zero |
| D. | constant |
| Answer» E. | |
| 294. |
Wavelength of ultraviolet region of electromagnetic spectrum is |
| A. | 121 nm |
| B. | 120 nm |
| C. | 119 nm |
| D. | 130 nm |
| Answer» B. 120 nm | |
| 295. |
Unification of electromagnetic and weak nuclear forces was done by |
| A. | Maxwell |
| B. | Faraday |
| C. | Kirchhoff |
| D. | Abdus-Salam |
| Answer» E. | |
| 296. |
Most stable isotope in nature is of |
| A. | iron-56 |
| B. | carbon-12 |
| C. | uranium-235 |
| D. | uranium-238 |
| Answer» B. carbon-12 | |
| 297. |
Most energetic photons are |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | x-rays |
| Answer» D. x-rays | |
| 298. |
Strongest ionizing radiation is |
| A. | Alpha |
| B. | beta |
| C. | gamma |
| D. | x-rays |
| Answer» B. beta | |
| 299. |
Resultant force acting on object and rate of change of linear momentum are |
| A. | inversely related |
| B. | not related at all |
| C. | directly related |
| D. | directly proportional |
| Answer» D. directly proportional | |
| 300. |
Momentum of electron having mass 9.1 10 -31 kg and velocity 2.0 107 is {{}} |
| A. | 1.91 10-23 |
| B. | 2.34 10-23 |
| C. | 3.11 10-19 |
| D. | 7.88 10-34 |
| Answer» B. 2.34 10-23 | |