If the inductor is replaced by a capacitor C, the voltage lags behind current in phase by π/4. UNIT I: DIVERSITY IN LIVING WORLD. (ii) emf induced in the other coil during the change. Size of object P is three times size of object Q. 3:39. The Physics chapter wise exercise questions with solutions will help you to complete your class work, revise important concepts and get higher marks in Class 11 exams. Obtain the expression for the electric field (E) at a point lying at a distance x from the wire, using Gauss’ law. Students who are in class 12th or preparing for any exam which is based on Class 12 Physics can refer NCERT Physics Book for their preparation. Magnetic declination is the angle between the magnetic meridian and the geographic meridian at a place on the earth. Sample Paper for class 11 Physical Education includes questions from Changing Trends and Career in Physical Education, Olympic Movement, Physical Fitness, Wellness and Lifestyle, Physical Education and Sports for Differently Abled, Yoga, Physical Activity and Leadership Training, Test, Measurement and Evaluation, Fundamentals of Anatomy and Physiology, Kinesiology, Biomechanics … Ethyl nitrosourea, poison gas, and vinyl chloride are common alkylating agents that add alkyl radical to the DNA and damages it. A farmer ploughing the field, a construction worker carrying bricks, a student studying for a competitive examination, an artist painting a beautiful landscape, all are said to be working. (b) A steady current of 2A flows through a circular coil having 5 turns of radius 7 cm. ( Any one). Unpolarised light of intensity Io is incident on two crossed polaroids. Other non-specific mutagens: Other unclassified mutagens are responsible for DNA damage and non-functioning … Why is a laminated iron core used in a transformer ? This is the list of some of the important physics formulas that are used by all class students mostly to solve physics problems. Physics Exemplar contains various types of questions. Metal ions are also dangerous to our DNA because it acts in styles of other ways. Intercalating Agents: There are certain dyes such as acridine orange, proflavine and acriflavin which are three ringed molecules of similar dimensions as those of purine pyrimidine pairs (Fig. (a) Differentiate between self inductance and mutual inductance. Example no 5.3 Chapter- Laws of Motion |class 11th Physics | Ncert Examples - Duration: 3:39. A circular loop of radius r, carrying a current I lies in y-z plane with its centre at the origin. It is observed that an external magnetic field of 0.25 T is required to hold the magnet in equilibrium at an angle of 30° with the field. CBSE students can download PDF of Class XI Model Question Papers for Maths, Physics, History, Chemistry. NCERT Solutions For Class 12 Physics Chapter 6 Electromagnetic Induction. (a) Why is a photo diode operated under reverse bias condition ? At the chromosomal level, the mutagens can alter the structure or number of chromosomes. Name the electro-magnetic waves with their frequency range, produced in, (a) Gamma rays, frequency range 1019 to 1024 Hz, (a) UV rays, frequency range 1015 to 1017 Hz, (b) Infrared rays, frequency range 1012 to 1014 Hz, Two coherent light waves of intensity 5 × 10–2 Wm–2 each super-impose and produce the interference pattern on a screen. Light of same wavelength is incident on three photo-sensitive surfaces A, B and C. The following observations are recorded. The molecules intercalate between the bases of DNA and disrupt its structure. Some of the most common mutagenic agents examples are UV light, X- rays, ROS, Alkylating agents and base analogy, etc. Copyright @ ncerthelp.com A free educational website for CBSE, ICSE and UP board. (b) What will be its resistance when its length becomes 2 Lo? The intensity of light transmitted by the combination will be _______. Justify your answer. In order to pursue student’s career in basic sciences and professional courses, they take up Physics as one of the subjects. UV rays, X-rays, alpha rays, neutrons, and other ionizing and non-ionizing radiations are mutagenic. The alkylated purine bases are removed by the phenomenon called depurination, although depurination isn't mutagenic. Mutagen A mutagen is any substance or agent that can cause a mutation, or change in the sequence or structure of DNA. Download the latest NCERT Books 2020-21 and offline apps based on latest CBSE Syllabus. Another example is methyl nitrosoguanidine that adds methyl group to guanine causing it to mispair with thyamine. (a) Derive the expression for the force acting between two long parallel current carrying conductors. An astronomical telescope may be a refracting type or a reflecting type. Electric field is conservative in nature / work done by or against the electric field does not depend upon the path followed. 2. These particles are, in some cases, mined for human use. (a) Because the fractional change in the minority carriers dominated very weak reverse current is more easily measurable than fractional change in forward biased large current, (a) It is a heavily doped p-n junction. What will be the current in the circuit when the distance is reduced to ‘d/2’ ? This is due to the huge application of electricity and related concepts in these fields. All the chapter wise questions with solutions to help you to revise the complete CBSE syllabus and score more marks in Your board examinations. The category of hard and soft materials includes metals and metallic alloys, synthetic products, and other natural materials, in the form of disks, squares, films, and foams. Using transgenic non-human organisms, DNA is inspected for spontaneous induced mutations to 1 or more suspected mutagenic agents. Because the electrostatic force is conservative in nature. Morando Soffritti, MD, Franco Minardi, MD, and Cesare Maltoni, MD *. It is gradually stretched till its length becomes 2 Lo. After we heat the DNA, over a specific degree (>95°C), the DNA becomes denatured- two single-stranded DNA generated from the dsDNA. (ii) From surface B, photo electrons are just emitted. Explain with the help of a diagram, the working of a step-down transformer. Reactive oxygen species, benzene, gum elastic and rubber products, sodium azide, aromatic amines, alkaloids, deaminating agents, and PAH (Polycyclic aromatic hydrocarbons) are other mutagens that make different mutations. Find the values of emf of the two cells. Also, extreme heat damages DNA and breaks the phosphodiester bonds too. Hence, define 1 A current. A wire of length Lo has a resistance Ro. Fortunately earlier year question papers can assist the understudies with scoring great in the tests. Content Not Uploaded Yet. Please mail at school@cbse.online or whatsapp at 8905629969 (a) Plot a graph showing variation of its resistance R with its length l during stretching. This role is played by mutagenic agents. An A.C. source with variable frequency is connected to a parallel plate capacitor. Common alkylating agents are Methylhydrazine, Temozolomide, Dacarbazine, Busulfan, Thio-TEPA, Carmustine, lomustine Dimethyl sulfate, Ethyl ethane sulfate. A point charge –q is also placed at the centre of the sphere. A wide variety of agents are categorized as carcinogens. The agents induce base-pairing errors by increasing ionization and produce gaps within the DNA strand. If the sequence of a nucleotide within a gene is modified, the protein can't form, or loss of function protein is created. NCERT Books Class 12 Physics: The National Council of Educational Research and Training (NCERT) publishes Physics textbooks for Class 12. NCERT Solutions for Class 11 Physics Chapter 5: Laws of Motion. Here we have given CBSE NCERT Exemplar Problems with Solutions for Class 11 Physics. At a point where the path difference between the waves is λ/6, λ being wavelength of the wave, find the. Infections are common mutagens that are well-known to us and create lethal health issues. The rapidly dividing cells are a chief target for ionizing radiations like X-rays. Physics: Scope and excitement; nature of physical laws; Physics, technology and society. Hence resistance in forward bias is low. X-rays, valproate, and toxoplasma are standard physical, chemical, and biological teratogens, respectively. The ratio of the de-Broglie wavelengths associated with them, will be. Science subjects which include Physics, Chemistry and Biology are very important for students who want to score good marks in their CBSE board examination. To access these free NCERT Physics Solutions (Class 12) chapters 1-15, follow the links tabulated below. If the frequency of light incident on the cathode of a photo-cell is increased, how will the following be affected ? What are the Most Popular Types of Mutagens as per the Effects? Radiations are the primary mutagenic agent reported in 1920. X-rays/ UV-rays, Aflatoxins, and retroviruses are standard physicals, chemical, and biological carcinogens, respectively. Here you can read Chapter 9 of Class 12 Physics NCERT Book. Give reason. As per Mutagenic agents' definition, the process describes monitoring and measuring the mutagenic potential of agents, which involves creating it. Biological Agents: Viruses, Bacteria, Transposons. (b) The mutual inductance of two coaxial coils is 2H. In the α-article scattering experiment, the shape of the trajectory of the scattered α-particles depend upon : (c) both impact parameter and source of α-particles. (c) resultant intensity in terms of the intensity at the maximum. (b) A bar magnet of dipole moment 3 Am2 rests with its centre on a frictionless pivot. Benzene - Physical and Chemical Properties, Difference Between Physical and Chemical Change, Artificial Sweeteners and Sweetening Agents, Difference Between Physical Capital and Human Capital, Indian Contract Act 1872 - Classes Of Agents, Physical Properties of Alkanes and Their Variations, Vedantu When L, C and R are connected in series with the same source. dceta.ncert@nic.in 011 2696 2580 NCERT, Sri Aurobindo Marg, New Delhi-110016 011 2696 2580 NCERT, Sri Aurobindo Marg, New Delhi-110016 (a) State the level of doping and biasing condition used in light emitting diode (LED). An overview of the topics to be covered for Physics in class 11 NEET . X-rays/ UV-rays, Aflatoxins, and retroviruses are standard physicals, chemical, and biological carcinogens, respectively. CBSETuts.com provides you Free PDF download of NCERT Exemplar Class 7 Science Chapter 6 Physical and Chemical Changes solved by expert teachers as per NCERT (CBSE) Book guidelines. A resistor R and an inductor L are connected in series to a source of voltage V = Vo sin ωt. Define ‘magnetic declination’ at a place on earth. (a) Explain the principle of working of a potentiometer. Pro Lite, Vedantu Free PDF download of NCERT Solutions for Class 11 Physics Chapter 7 - Systems of Particles and Rotational Motion solved by Expert Teachers as per NCERT (CBSE) textbook guidelines. (b) Show graphically the variation of this electric field E as a function of distance x from the wire. If you grasp the underlying theory behind the formulas then physics will be easier for you. Repeated local injury (e.g., wounding) or recurring irritation (e.g., chronic inflammation) to a part of the body are other examples of potential physical carcinogens. Carcinogens: The carcinogens are the class of mutagens that induce tumour formation and thus cause cancer. The combination is connected to the potentiometer circuit in each case. CBSE Syllabus Class 12 Maths Physics Chemistry ... 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