McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 501. |
Least count of screw gauge is |
| A. | 0.01 cm |
| B. | 0.5 cm |
| C. | 0.1 cm |
| D. | 0.01 mm |
| Answer» D. 0.01 mm | |
| 502. |
Increase in kinetic energy of car having mass 800 kg and velocities ranging from 20 m s -1 to 30 m s -1 is {{}} |
| A. | 300 KJ |
| B. | 500 KJ |
| C. | 400 KJ |
| D. | 200 KJ |
| Answer» D. 200 KJ | |
| 503. |
Work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is |
| A. | 1000 kJ |
| B. | 1300 kJ |
| C. | 1400 kJ |
| D. | 1200 kJ |
| Answer» D. 1200 kJ | |
| 504. |
Internal resistance of cell when there is current of 0.40 A when a battery of 6.0 V is connected to a resistor of 13.5 Ω is |
| A. | 1.5 Ω |
| B. | 2.3 Ω |
| C. | 3.5 Ω |
| D. | 4.5 Ω |
| Answer» A. 1.5 Ω | |
| 505. |
Barrel of screw gauge has |
| A. | 100 divisions |
| B. | 50 divisions |
| C. | 10 divisions |
| D. | 45 divisions |
| Answer» B. 50 divisions | |
| 506. |
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» C. precise measurement | |
| 507. |
A motor of the lift provides a force of 20 kN which rises it by 18 m in 10 s, the output power of motor is |
| A. | 36 kW |
| B. | 46 kW |
| C. | 56 kW |
| D. | 66 kW |
| Answer» A. 36 kW | |
| 508. |
Actual range of values around a measurement is called |
| A. | error |
| B. | uncertainty |
| C. | accuracy |
| D. | precision |
| Answer» B. uncertainty | |
| 509. |
Depth of water in a bottle is 24.3 cm and uncertainty is 0.2 cm, percentage uncertainty in measurement is |
| A. | 0.82% |
| B. | 9% |
| C. | 1% |
| D. | 2% |
| Answer» A. 0.82% | |
| 510. |
While taking the reading, the line of sight should be |
| A. | at acute angle to the scale |
| B. | perpendicular to scale |
| C. | at obtuse angle to the scale |
| D. | parallel to the scale |
| Answer» B. perpendicular to scale | |
| 511. |
Maximum current a battery of e.m.f 3.0 V and internal resistance 1.0 Ω is |
| A. | 4.0 A |
| B. | 5.0 A |
| C. | 3.0 A |
| D. | 30 A |
| Answer» C. 3.0 A | |
| 512. |
In potential dividers, the output voltage depends upon the |
| A. | single resistor |
| B. | relative values of all resistors |
| C. | current |
| D. | temperature |
| Answer» B. relative values of all resistors | |
| 513. |
Calipers are used to measure the |
| A. | diameter |
| B. | length |
| C. | thickness |
| D. | volume |
| Answer» A. diameter | |
| 514. |
Smallest division on stopwatch is |
| A. | 0.1 s |
| B. | 0.05 s |
| C. | 0.01 s |
| D. | 1 s |
| Answer» C. 0.01 s | |
| 515. |
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» A. 1.0 kW m-2 | |
| 516. |
When light enters from vacuum in to glass, it's velocity |
| A. | decreases |
| B. | remains same |
| C. | increases |
| D. | varies depending on mass of glass |
| Answer» A. decreases | |
| 517. |
As wave travels, intensity |
| A. | increases |
| B. | remains same |
| C. | decreases |
| D. | varies |
| Answer» C. decreases | |
| 518. |
Waves that move through materials are called |
| A. | progressive waves |
| B. | EM waves |
| C. | radio waves |
| D. | UV waves |
| Answer» A. progressive waves | |
| 519. |
Speed of sound in air is {{}} |
| A. | 280 m s-1 |
| B. | 300 m s-1 |
| C. | 350 m s-1 |
| D. | 330 m s-1 |
| Answer» D. 330 m s-1 | |
| 520. |
Particles vibrate about their mean positions and transfer |
| A. | frequency |
| B. | wavelength |
| C. | energy |
| D. | power |
| Answer» C. energy | |
| 521. |
Speed of electromagnetic radiation is independent of |
| A. | wavelength |
| B. | amplitude |
| C. | time period |
| D. | frequency |
| Answer» D. frequency | |
| 522. |
Mechanical waves include |
| A. | sound |
| B. | light |
| C. | EM waves |
| D. | UV waves |
| Answer» A. sound | |
| 523. |
A complete cycle of wave is around |
| A. | 90° |
| B. | 180° |
| C. | 45° |
| D. | 360° |
| Answer» D. 360° | |
| 524. |
Changing magnetic field induces |
| A. | charge |
| B. | current |
| C. | frequency |
| D. | voltage |
| Answer» B. current | |
| 525. |
Phase difference is measured in |
| A. | degrees |
| B. | meters |
| C. | seconds |
| D. | newton |
| Answer» A. degrees | |
| 526. |
Speed at which stars and galaxies are moving away from us is determined by phenomena of |
| A. | blue shift |
| B. | yellow shift |
| C. | red shift |
| D. | orange shift |
| Answer» C. red shift | |
| 527. |
Electric and magnetic fields vary at angle of |
| A. | 30° |
| B. | 90° |
| C. | 45° |
| D. | 180° |
| Answer» B. 90° | |
| 528. |
Unification of electromagnetic and weak nuclear forces was done by |
| A. | Maxwell |
| B. | Faraday |
| C. | Kirchhoff |
| D. | Abdus-Salam |
| Answer» D. Abdus-Salam | |
| 529. |
Frequency and time period are |
| A. | directly related |
| B. | not related |
| C. | inversely related |
| D. | directly proportional |
| Answer» C. inversely related | |
| 530. |
Amount by which one oscillation leads or lags behind another is called |
| A. | in phase |
| B. | intensity |
| C. | phase difference |
| D. | superposition |
| Answer» C. phase difference | |
| 531. |
Number of oscillations per unit time is called |
| A. | wavelength |
| B. | amplitude |
| C. | displacement |
| D. | frequency |
| Answer» D. frequency | |
| 532. |
If the particles of medium vibrate at right angles to the direction of velocity then wave is |
| A. | longitudinal |
| B. | transverse |
| C. | abrupt |
| D. | sound |
| Answer» B. transverse | |
| 533. |
Intensity of a wave is directly proportional to the |
| A. | amplitude |
| B. | square of amplitude |
| C. | cube of amplitude |
| D. | frequency |
| Answer» B. square of amplitude | |
| 534. |
Wave speed is directly proportional to |
| A. | frequency |
| B. | amplitude |
| C. | wavelength |
| D. | energy |
| Answer» C. wavelength | |
| 535. |
Longitudinal waves gives rise to |
| A. | amplitude |
| B. | frequency |
| C. | wavelength |
| D. | high and low pressure regions |
| Answer» D. high and low pressure regions | |
| 536. |
Ranges of waves which overlap are |
| A. | x-rays and gamma rays |
| B. | x-rays and infrared rays |
| C. | gamma rays and infrared rays |
| D. | UV rays and infrared rays |
| Answer» A. x-rays and gamma rays | |
| 537. |
In order to find the internal structure of nucleus, electrons should be accelerated by voltages up to |
| A. | 105 V |
| B. | 107 V |
| C. | 109 V |
| D. | 1011 V |
| Answer» C. 109 V | |
| 538. |
High speed electrons have wavelength of order |
| A. | 10-15 m |
| B. | 10-14 m |
| C. | 10-16 m |
| D. | 10-17 m |
| Answer» A. 10-15 m | |
| 539. |
Wavelength of slow moving neutrons is about |
| A. | 10-34 m |
| B. | 10-20 m |
| C. | 10-19 m |
| D. | 10-10 m |
| Answer» D. 10-10 m | |
| 540. |
High speed electrons from particle detectors are used to determine |
| A. | arrangement of atoms in metals |
| B. | diameter of atomic nuclei |
| C. | inter atomic distance |
| D. | circumference of atomic nuclei |
| Answer» B. diameter of atomic nuclei | |
| 541. |
Energy of gamma photon is greater than |
| A. | 102 J |
| B. | 10-13 J |
| C. | 1013 J |
| D. | 105 J |
| Answer» B. 10-13 J | |
| 542. |
Waves associated with electrons are referred to as |
| A. | plasma waves |
| B. | UV waves |
| C. | gamma rays |
| D. | matter waves |
| Answer» D. matter waves | |
| 543. |
Frequency below which no electrons are emitted from metal surface is |
| A. | minimum frequency |
| B. | angular frequency |
| C. | maximum frequency |
| D. | threshold frequency |
| Answer» D. threshold frequency | |
| 544. |
Loss of energy of an electron results in |
| A. | absorption of photon |
| B. | emission of photon |
| C. | destruction of photon |
| D. | formation of photon |
| Answer» B. emission of photon | |
| 545. |
Wavelength of a 65 kg person running at a speed of 3 m s -1 through an opening of width 0.80 m is {{}} |
| A. | 34 m |
| B. | 35 m |
| C. | 3.4 × 10-36 m |
| D. | 3.5 m |
| Answer» C. 3.4 × 10-36 m | |
| 546. |
According to Newton, the light travels as |
| A. | particles |
| B. | waves |
| C. | both A and B |
| D. | dust |
| Answer» A. particles | |
| 547. |
In electron diffraction, the rings behave as |
| A. | particles |
| B. | waves |
| C. | both A and B |
| D. | rays |
| Answer» B. waves | |
| 548. |
Energy absorbed by electron is used in |
| A. | escaping the metal |
| B. | increasing kinetic energy |
| C. | both A and B |
| D. | increasing frequency |
| Answer» C. both A and B | |
| 549. |
Diffraction of slow moving electrons is used to estimate |
| A. | arrangement of atoms in metals |
| B. | nature of atoms |
| C. | number of atoms in metals |
| D. | position of atoms in metalloids |
| Answer» A. arrangement of atoms in metals | |
| 550. |
Energy of photon is directly related to the |
| A. | wavelength |
| B. | wave number |
| C. | frequency |
| D. | amplitude |
| Answer» C. frequency | |
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