SOZ BY keenplify (WEEK 11-20) https://www.youtube.com/channel/UCJFpwSSupQut6trEhoBy_SA PS: May mga question na iba yung sagot sa week nila, bahala na kayo basta eto na yung answer key 😊 What is one way to increase the current in a wire? A: Increase the number of coils Voltage can be induced in a wire by__________. A: all of these Electromagnetic induction is change in ___________________. A: magnetic flux Which description best applies to Lenz's Law? A: When a change in magnetic field occurs to a coil the direction of current goes in the in the other direction to this change. Law says that the Induced current is proportional to the change of magnetic flux A: Faraday's A magnet is moved in and out of a coil of wire connected to a high-resistance voltmeter. If the number of coils doubles, the induced voltage ___________ A: doubles A magnet can move in a coil of wire to produce electricity in which system? A: Generator Voltage can be induced in a wire by A: all of these What benefit is gained by the addition of the iron core in an electromagnet? A: It makes a weak magnet stronger What would happen if I move a bar magnet in and out of a coil of copper wire? A: Electric current will flow through the wire The period of a wave is A: time required to complete one cycle The power factor is the ratio of __________________ power to _________________ power. A: true and apparent The type of current where charges shake back and forth in a circuit A: Alternating Current When frequency decreases, capacitive reactance _____. A: increases In a circuit containing resistance only, the voltage and current are with one another. A: in phase Which of the following is true of the current in a capacitive circuit? A: It leads the voltage. Battery is ________. A: DC source Current from a battery is _____________. A: DC Current that is used by most household appliances____________. A: AC The current in an inductive circuit _____. A: lags the voltage X-ray photographs show softer tissue__________. A: as dark, highly exposed areas. Which of the following occurs as a light wave bends when it passes from one medium into another? A: refraction Electromagnetic waves vary in _______. A: wavelength and frequency. To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its__________. A: wavelength Newton’s prism experiments showed that white sunlight is made up of__________. A: all the colors of the visible spectrum. Infrared rays have a shorter wavelength than__________. A: radar waves. Light acts like__________. A: Both a wave and a particle The visible light spectrum ranges between__________. A: infrared rays and ultraviolet rays. Which of the following occurs as light travels farther from its source? A: Far from the source, photons spread over a larger area. Cellular telephones utilize__________. A: microwaves An image that is formed at the back of the mirror is said to be_______. A: virtual image What is the characteristic of image formed when given that u and f have the same value of length? A: real or virtual, image formed at infinity A concave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/The focal length of the lens will be__________ A: 4.4 cm An image is formed upside down in front of mirror and seems bigger by 2 times from the actual size. What might be the type of mirror uses? A: concave mirror To determine the characteristics of image formed we need to a draw ray diagram that uses_______. A: at least 2 rays that overlap each other When a ray of light enters a glass slab from air_______. A: its wavelength decreases A hollow convex lens of glass will behave like__________. A: glass plate Angle of minimum deviation is equal to the angle of prism A of an equilateral glass prism. The angle of incidence at which minimum deviation will be obtained is __________ A: 60∘ Which statement is true about convex mirror? A: image formed is virtual and diminished A real image is formed by a convex lens, then it is put in contact with a concave lens and again a real image is formed. This image is ______________ A: shift away from the lens system The combination of two or more waves that result in a single wave___________. A: interference How loud or soft a sound is, is related to the _____________ of the wave A: amplitude Constructive interference will cause the wave to ___________. A: Increase its displacement In ________ interference, the energy of the combined wave is greater than the energy of each of the two waves. A: constructive When a wave bends around a barrier or passes through an opening, it is called__________. A: Diffraction _____________ wave particles move left to right. A: Longitudinal Which wave behavior do noise cancelling headphones use? A: destructive interference If two sound waves differ in intensity, the wave that is more intense sounds________ A: louder What is interference? A: occurs when two or more waves overlap and combine occurs when two or more waves combine to produce a wave with a smaller amplitude/energy. A: Destructive interference The full range of frequencies of electromagnetic radiation is called ______________. A: radio waves The waves with the longest wavelengths in the electromagnetic spectrum are __________. A: Infrared rays To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its A: wavelength Which of the following occurs as light travels farther from its source? A: The source gives off less light as photons move away from it. Which of the following occurs as a light wave bends when it passes from one medium into another? A: constructive interference X-ray photographs show softer tissue____________. A: as invisible. Electromagnetic waves vary in__________. A: wavelength and frequency. The visible light spectrum ranges between _____________. A: television waves and infrared rays. Light acts like _______ A: Both a wave and a particle Infrared rays have a shorter wavelength than ____________. A: Ultraviolet ray. WEEK 18 When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element _______. A: remains the same The process of the production of lighter nuclei from heavier nuclei is called ___________. A: fission Negatively charged particles emitted from a nucleus at a high speed are ____. A: beta particles The three types of nuclear radiation in increasing order of penetrating power are ____. A: alpha, beta, gamma Radioactive materials have unstable___________. A: nuclei A helium nucleus with two protons and two neutrons is called a(n) ____. A: alpha particle The type of radioactive particle that can be stopped by a sheet of paper is the ____. A: alpha particle The most penetrating type of radiation is the ____. A: gamma ray What is Half-life? A: The amount of time it takes for half the nuclei in a sample of the isotope to decay The process by which nuclei having low masses are united to form nuclei with larger masses is ____. A: fusion
