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.
| 451. |
Energy stored in a 2000 mF capacitor charged to a potential difference of 10 V is |
| A. | 0.12 J |
| B. | 1.3 J |
| C. | 0.10 J |
| D. | 3 J |
| Answer» D. 3 J | |
| 452. |
Momentum of two objects moving with same speed but in opposite direction upon collision is |
| A. | increased |
| B. | decreased |
| C. | is zero |
| D. | is infinite |
| Answer» D. is infinite | |
| 453. |
Maximum energy an x-ray photon can have is {{}} |
| A. | e V |
| B. | e |
| C. | eV |
| D. | V |
| Answer» D. V | |
| 454. |
Wavelength of an incident light when it is incident normally on a diffraction grating having 3000 lines per centimeter angular separation is 10 is |
| A. | 500 nm |
| B. | 650 nm |
| C. | 580 nm |
| D. | 600 nm |
| Answer» D. 600 nm | |
| 455. |
At separation between a node and antinode, wavelength becomes |
| A. | |
| B. | 2 |
| C. | 4 |
| D. | 2 |
| Answer» D. 2 | |
| 456. |
Amplifier produces output with more |
| A. | power only |
| B. | voltage only |
| C. | current only |
| D. | power and voltage |
| Answer» E. | |
| 457. |
With gel between skin and transducer percentage of reflected intensity of ultrasonic is |
| A. | 0.03% |
| B. | 0.05% |
| C. | 0.06% |
| D. | 0.08% |
| Answer» B. 0.05% | |
| 458. |
In transformer, alternating current is induced in |
| A. | primary coil |
| B. | secondary coil |
| C. | iron core |
| D. | resistor |
| Answer» C. iron core | |
| 459. |
In a stationary wave, nodes are at |
| A. | fixed points |
| B. | movable points |
| C. | there are no nodes |
| D. | random points |
| Answer» B. movable points | |
| 460. |
If we double the temperature of an ideal gas, then it's average kinetic energy will be |
| A. | halved |
| B. | triple the original |
| C. | fourth times of original |
| D. | doubled |
| Answer» E. | |
| 461. |
Phenomena in which signal transmitted in one circuit creates undesired effect in other circuit is known as |
| A. | crosstalk |
| B. | signal attenuation |
| C. | sampling |
| D. | crosslinking |
| Answer» E. | |
| 462. |
Gradual decrease in x-ray beam intensity as it passes through material is called |
| A. | attenuation |
| B. | decay |
| C. | radioactivity |
| D. | imaging |
| Answer» B. decay | |
| 463. |
For destructive interference, the path difference is |
| A. | odd number of half wavelengths |
| B. | even number of half wavelengths |
| C. | whole number of wavelengths |
| D. | even whole number of wavelengths |
| Answer» B. even number of half wavelengths | |
| 464. |
If the connections across the resistor are reversed, then graph between current and potential difference is |
| A. | variable |
| B. | straight lined |
| C. | constant |
| D. | inverted |
| Answer» C. constant | |
| 465. |
Interference pattern of light and dark bands on screen is called |
| A. | graphical pattern |
| B. | line spectrum |
| C. | light spectrum |
| D. | fringes |
| Answer» E. | |
| 466. |
In a perfectly elastic collision, the relative speed of approach and relative speed of separation are |
| A. | equal |
| B. | in equal |
| C. | zero |
| D. | infinite |
| Answer» B. in equal | |
| 467. |
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» B. 46 kW | |
| 468. |
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» B. 9% | |
| 469. |
If output voltage is greater than input voltage, then transformer is |
| A. | step up |
| B. | step down |
| C. | faulty |
| D. | fatal |
| Answer» B. step down | |
| 470. |
Impedance of ideal op-amp is |
| A. | zero |
| B. | 1 |
| C. | infinite |
| D. | 2 |
| Answer» D. 2 | |
| 471. |
Current in a circuit when a charge of 180 C passes a point in a circuit in 2 minutes is |
| A. | 1:00 AM |
| B. | 2:00 AM |
| C. | 3:00 AM |
| D. | 1.5 A |
| Answer» E. | |
| 472. |
Area under current-time graph represents |
| A. | magnitude of charge |
| B. | dielectric |
| C. | amount of positive charge |
| D. | amount of negative charge |
| Answer» B. dielectric | |
| 473. |
Digital number 9 can be represented in binary number as |
| A. | 110 |
| B. | 1001 |
| C. | 1010 |
| D. | 1011 |
| Answer» C. 1010 | |
| 474. |
Each digit in a binary number is known as a |
| A. | bit |
| B. | byte |
| C. | number |
| D. | digit |
| Answer» B. byte | |
| 475. |
Op-amp can provide maximum output current of |
| A. | 25 mA |
| B. | 30 mA |
| C. | 35 mA |
| D. | 40 mA |
| Answer» B. 30 mA | |
| 476. |
Number of power supplies required to get output of op-amp is |
| A. | two |
| B. | four |
| C. | six |
| D. | three |
| Answer» B. four | |
| 477. |
Period of simple harmonic motion of a spiral spring or elastic thread is given by |
| A. | T = 2 (extension produced/gravitational field strength |
| B. | T = 2 (extension produced/ (gravitational field strength |
| C. | T = 2 ( (extension produced)/gravitational field strength |
| D. | T = 2 (extension produced/gravitational field strength |
| Answer» E. | |
| 478. |
Actual range of values around a measurement is called |
| A. | error |
| B. | uncertainty |
| C. | accuracy |
| D. | precision |
| Answer» C. accuracy | |
| 479. |
If frequency of modulated wave is less than frequency of carrier wave, then input signal is |
| A. | negative |
| B. | positive |
| C. | zero |
| D. | infinite |
| Answer» B. positive | |
| 480. |
Einstein's mass-energy relationship states that if the mass decreases by m, the energy released E is given by {{}} |
| A. | E = m c, where "c" denotes the speed of light. |
| B. | E = m c , where "c" denotes the speed of light. |
| C. | E = m c, where "c" denotes the speed of light. |
| D. | E = m c , where "c" denotes the speed of light. |
| Answer» C. E = m c, where "c" denotes the speed of light. | |
| 481. |
Number of degree a complete circle represents is |
| A. | 90 |
| B. | 180 |
| C. | 270 |
| D. | 360 |
| Answer» E. | |
| 482. |
Output resistance of an actual op-amp is |
| A. | 45 |
| B. | 46 |
| C. | 70 |
| D. | 75 |
| Answer» E. | |
| 483. |
Two waves with phase difference 180 have resultant of amplitude |
| A. | one |
| B. | zero |
| C. | same as the single wave |
| D. | doubles the single wave |
| Answer» C. same as the single wave | |
| 484. |
As amplitude of resonant vibrations decreases, degree of damping |
| A. | increases |
| B. | remains same |
| C. | decreases |
| D. | varies |
| Answer» D. varies | |
| 485. |
Combined resistance of 5 and 10 is equal to |
| A. | 10 |
| B. | 16 |
| C. | 15 |
| D. | 20 |
| Answer» D. 20 | |
| 486. |
Two 10 resistors are connected in parallel, their equivalent resistance is |
| A. | 5 |
| B. | 0.2 |
| C. | 15 |
| D. | 20 |
| Answer» B. 0.2 | |
| 487. |
Point where spring oscillates with maximum amplitude is called |
| A. | node |
| B. | antinode |
| C. | fixed end |
| D. | movable end |
| Answer» C. fixed end | |
| 488. |
Fractional increase in original length is called |
| A. | stress |
| B. | strain |
| C. | tensile force |
| D. | compression |
| Answer» C. tensile force | |