# MCQ in Physics Part 12 | ECE Board Exam

(Last Updated On: July 17, 2021) This is the Multiples Choice Questions Part 12 of the Series in Physics as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS), Physics Books, Journals and other Physics References.

#### Continue Practice Exam Test Questions Part 12 of the Series

Choose the letter of the best answer in each questions.

551. A type of wave in which the particles vibrate in direction at right angles to the direction of the wave travel.

a) Wave front

b) Transverse waves

c) Longitudinal waves

d) Wave length

Explanation:

552. A type of wave in which individual particles vibrate in a direction parallel to the direction of the wave travel.

a) Longitudinal waves

b) Stationary wave

c) Wave front

d) Transverse waves

Explanation:

553. A surface that passes through all points in the wave those are in the same phase.

a) Longitudinal waves

b) Transverse waves

c) Wave front

d) Stationary wave

Explanation:

554. Interference in which two waves arrive at a point in phase with each other and the resulting amplitude is the sum of the amplitudes is the sum of the amplitudes of the two original waves.

a) Constructive interference

b) Destructive interference

c) Opposing interference

d) None of these

Explanation:

555. The waves arrive a half wave out of phase and the resultant amplitude is the difference between the two amplitude.

a) Destructive interference

b) Constructive interference

c) Opposing interference

d) None of these

Explanation:

556. A principle stating that each point on a wave front may be considered as a new source of disturbance sending wavelets in forward direction. At any instant the new wave front is the surface tangent to all wave length.

a) Huygen’s principle

b) Hygen’s principle

c) Hugen’s principle

d) Hegyn’s principle

Explanation:

557. The change of direction of a wave due to speed changes.

a) Dispersion

b) Refraction

c) Wave front

d) Wave misalignment

Explanation:

558. Wave produced when two waves of equal amplitude and frequency travel in opposite directions in a medium.

a) Stationary Wave

b) Antinodes

c) wave front

d) wave misalignment

Explanation:

559. Points in a stationary wave at which the amplitude is zero.

a) antinodes

b) nodes

c) pronodes

d) none of these

Explanation:

560. Points of maximum amplitude.

a) antinodes

b) nodes

c) pronodes

d) none of these

Explanation:

561. A disturbance caused by a vibrating body and sense by the ear.

a) force vibration

b) resonance

c) sound

d) intensity

Explanation:

562. Set up by an elastic body by another vibrating body.

a) resonance

b) amplitude

c) forced vibration

d) super sonic wave

Explanation:

563. Forced vibration where the natural frequency of the coupled body is the same as that of the vibrator.

a) resonance

b) amplitude

c) forced vibration

d) super sonic wave

Explanation:

564. Effect due to the combined action of two set of waves passing through a single region at the same time.

a) interference

b) Doppler effect

c) refraction

d) ultrasonic

Explanation:

565.The apparent frequency of a sound source is changed if there is relative motion between the source and the observer.

a) Doppler effect

b) supersonic

c) interference

d) ultrasonic

Explanation:

566. A highly concentrated pressure wave caused by an object flying faster than speed of sound.

a) sonic-boom shock wave

b) ultrasonic

c) supersonic

d) resonance

Explanation:

567. A speed greater than the speed of sound.

a) supersonic

b) ultrasonic

c) infrasonic

d) micro sonic

Explanation:

568. Sound produced by an object that vibrates with a frequency above the range of human hearing.

a) supersonic

b) ultrasonic

c) infrasonic

d) micro sonic

Explanation:

569. The study of sound production and transmission in relation to the human sense of hearing.

a) music

b) acoustic

c) noise

d) pitch

Explanation:

570. A sound produce by a regular vibration.

a) musical tone

b) acoustic

c) noise

d) pitch

Explanation:

571. Any undesirable sound.

a) musical tone

b) acoustic

c) noise

d) pitch

Explanation:

572. The highness or lowness of a sound as characterized by the frequency of vibration.

a) musical tone

b) acoustic

c) noise

d) pitch

Explanation:

573. Refers to the complexity of the sound.

a) musical tone

b) acoustic

c) noise

d) pitch

Explanation:

574. The magnitude of hearing sensation produced by the sound.

a) intensity

b) intensity level

c) loudness

d) bell

Explanation:

575. The rate at which sound energy flows through a unit area.

a) intensity

b) intensity level

c) loudness

d) bell

Explanation:

576. The logarithm of the ratio of the intensity of a sound to an arbitrary chosen intensity.

a) intensity

b) intensity level

c) loudness

d) bell

Explanation:

577. The unit of intensity.

a) intensity

b) intensity level

c) loudness

d) bel

Explanation:

578. The succession of tones related to each other.

a) musical tone

b) intensity level

c) musical pitch

d) musical scale

Explanation:

579. The persistence of sound in a enclose space.

a) echo

b) reverberation

c) reflection

d) complexity

Explanation:

580. Rebounding of light from certain substances.

a) reflection

b) interference

c) refraction

d) diffraction

Explanation:

581. The property of light by which it travels in a straight line.

a) intensity

b) rectilinear propagation

c) polarization

d) diffraction

Explanation:

582. The process by which the vibrations of light are confined to a definite plane.

a) intensity

b) rectilinear propagation

c) polarization

d) diffraction

Explanation:

583. A theory which states that light is a special form of wave disturbances.

a) wave theory or adulatory theory of light

b) quantum theory

c) wave disturbances theory

d) none of these

Explanation:

584. States that energy exchanges between matters occur in discrete amounts of energy which are proportional to the frequency.

a) wave theory or adulatory theory of light

b) quantum theory

c) wave disturbances theory

d) none of these

Explanation:

585. Refers to the quantity of visible radiation passing per unit time.

a) luminous flux

b) quantum theory

c) lumen

d) candle

Explanation:

586. Unit of luminous intensity

a) luminous flux

b) luminous intensity

c) lumen

d) candle

Explanation:

587. Unit of luminous flux.

a) luminous flux

b) luminous intensity

c) lumen

d) candle

Explanation:

588. Evaluated in terms of the power that causes the brightness sensation from a standard candle.

a) illuminance

b) luminous intensity

c) lumen

d) candle

Explanation:

589. Luminous flux per unit area that reaches the surface.

a) illuminance

b) luminous intensity

c) lumen

d) candle

Explanation:

590. A faint blue white glow produced in water and other transparent substances when charges particles pass through the substances at speeds greater than the speed of light through these substances.

a) illuminance

c) blue tooth

Explanation:

591. Instrument use for comparing luminous intensities of light sourced.

a) odometer

b) luminous tester

c) luminance

d) photometer

Explanation:

592. Source intensity per unit projected area of emitting surface.

a) odometer

b) luminous tester

c) luminance

d) photometer

Explanation:

593. Law of reflection.

a) the angle of reflection is equal to the angle of incidence.

b) the reflected ray, the incident ray, and the normal to the surface are in the same plane principal focus of a spherical mirror.

c) both a and b

d) none of these

Explanation:

594. Rays farther from the principal axis of the spherical mirror are reflected to cross the axis nearer to the mirror than those close to the axis.

a) spherical

b) aberration

c) vertical length

d) spherical aberration

Explanation:

595. The ratio of the speed of light v1 in the first medium to the speed v2 in the second medium.

a) absolute index of refraction

b) index of refraction

c) total internal refraction

d) mirage

Explanation:

596. The ratio of the speed of light in empty space to the speed in the medium.

a) absolute index of refraction

b) index of refraction

c) total internal refraction

d) mirage

Explanation:

597. Phenomenon due to atmospheric refraction.

a) absolute index of refraction

b) index of refraction

c) total internal refraction

d) mirage

Explanation:

598. Occur when light passes from a medium of less speed to one of greater speed.

a) absolute index of refraction

b) index of refraction

c) total internal refraction

d) mirage

Explanation:

599. The point at which rays parallel to the principal axis converge after passing through a converging lens.

a) principal focus

b) focal length

c) real image

d) virtual image

Explanation:

600. Distance of principal focus from the lens.

a) principal focus

b) focal length

c) real image

d) virtual image

Explanation:

#### Online Questions and Answers in Physics Series

Following is the list of practice exam test questions in this brand new series:

College Physics MCQs
PART 1: MCQ from Number 1 – 50                        Answer key: PART 1
PART 2: MCQ from Number 51 – 100                   Answer key: PART 2
PART 3: MCQ from Number 101 – 150                 Answer key: PART 3
PART 4: MCQ from Number 151 – 200                 Answer key: PART 4
PART 5: MCQ from Number 201 – 250                 Answer key: PART 5
PART 6: MCQ from Number 251 – 300                 Answer key: PART 6
PART 7: MCQ from Number 301 – 350                 Answer key: PART 7
PART 8: MCQ from Number 351 – 400                 Answer key: PART 8
PART 9: MCQ from Number 401 – 450                 Answer key: PART 9
PART 10: MCQ from Number 451 – 500                 Answer key: PART 10

Complete List of MCQs in General Engineering and Applied Science per topic

Series of MCQ in General Engineering and Applied Science