CBSE 12th Standard Physics Subject Moving Charges And Magnetism Value Based Questions 3 Mark Questions With Solution 2021
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CBSE 12th Standard Physics Subject Moving Charges And Magnetism Value Based Questions 3 Mark Questions With Solution 2021
12th Standard CBSE
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Reg.No. :
Physics
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While watching Discovery channel Sheela was impressed that certain organisms have the ability to sense the field lines of earth's magnetic field. They use this ability to travel from one location to another, Sheela wanted to find the angle of dip at her place. She then mounted the compass on a cardboard and placed it vertically along the magnetic meridian. She was able to measure the angle of dip
(a) What values did Sheela have?
(b) Define the magnetic element of earth.(a) -
Babita and Sheela class XII students were assigned a project based on magnetism.In their project work, they calculated the value of earth's magnetic field.When they submitted their project work for verification.
Mr.Raj, their physics teacher, corrected the mistake.Hew also suggested few books which could be of use to them.
What values did Mr.Raj exhibit towards his students? Mention any two.(a) -
A Ramesh while doing his physics practical in a class, found that if a voltmeter, an ammeter and a resistance are connected in series to a lead accumulator, there is deflection in the voltmeter but the deflection in ammeter is negligible. He discussed his problem with all his class fellows but no one could explain the reason. Harshpreet was also studying in his class. When he discussed the problem with her, she explained the reason and then whole class was informed by both of them.
(a) What was the reason for deflection in voltmeter and negligible deflection in the ammeter?
(b) What value were displayed by Ramesh and Harshpreet?(a)
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CBSE 12th Standard Physics Subject Moving Charges And Magnetism Value Based Questions 3 Mark Questions With Solution 2021 Answer Keys
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(a) The values showed by Sheela were nature of appreciation, curiosity, diligence, and creative skill
(b)There are three magnetic elements of earth magnetic field.
(i) Declination at a place is the angle between magnetic and geographical meridian at that place.
(ii) Magnetic dip or inclination is the angle which the strength of earth's magnetic field makes with its horizontal component in the magnetic meridian.
(iii) Horizontal component of earth's magnetic field is the component of total intensity of earth's magnetic field in the horizontal direction in the magnetic meridian. -
Honesty, helpfulness, responsible behaviour towards students, concern for the students, concern for the students to create interest in the subject.
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(a) A voltmeter is a galvanometer in which a high resistance is connected in series and an ammeter is a galvanometer in which low resistance is connected in parallel (called shunt of the ammeter). When all the voltmeter, ammeter and a resistance are connected in series to lead accumulator, the resistance of circuit becomes very high (because a voltmeter is a high resistance galvanometer). So, there is very low current in the circuit. When current is passed through the voltmeter, it produces some deflection. But in case of ammeter, the current passes through the shunt of the ammeter and not through the coil and hence produces no(or negligible) deflection.
(b) The values displayed by Ramesh:
(i) Presence of mind and general awareness
(ii) scientific thinking.
The value displayed by Harshpreet---
(i) Helping nature and
(ii) deep knowledge of the subject.
