Free download NCERT Solutions for Class 12 Physics Chapter 4 Moving Charges and Magnetism chapter end Exercises Questions Answers and Additional Exercises Solutions in PDF form. NCERT Solutions and CBSE Apps are updated according to new CBSE Books for 2019-20.
|Chapter 4:||Moving Charges and Magnetism|
NCERT Solutions for Class 12 Physics Chapter 4
- 12 Physics Chapter 4: Moving Charges and Magnetism
- Study Online: Exercises Question Answers
- Study Online: Additional Exercises Answers
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- NCERT Book Chapter 4
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12 Physics Chapter 4 Exercises
NCERT Solutions for Class 12 Physics Chapter 4 Moving Charges and Magnetism exercises are given below to use it online. Click here to see the Additional Exercises questions of this chapter or go to 12 Physics main page.
12 Physics Chapter 4 Additional Exercises
NCERT Solutions for Class 12 Physics Chapter 3 Moving Charges and Magnetism additional exercises are given below to use it online. Click here to see Exercises Questions or move to Top of the page or go to 12 Physics main page.
Questions for practice
- An electric current flows in a horizontal wire from East to West. What will be the direction of magnetic field due to current at a point (i) North of wire; (ii) above the wire.
- If the magnetic field is parallel to the positive y-axis and the charged particle is moving along the positive x-axis, which way would the Lorentz force be for (a) an electron (negative charge), (b) a proton (positive charge).
- An electron beam projected along + x-axis, experiences a force due to a magnetic field along the + y-axis. What is the direction of the magnetic field?
- In a circuit instantaneously voltage and current are V = 150 sin 314t volt and i = 12 cos 314 t ampere respectively. Is the nature of circuit is capacitive or inductive?
- A wire moves with some speed perpendicular to a magnetic field. Why is emf induced across the rod?
- Define RMS Value of Current. [Answer: RMS Value of ac is defined as that value of direct current which produces the same heating effect in a given resistor as is produced by the given alternating current when passed for the same time.]
- A galvanometer of resistance 120gives full scale deflection for a current of 5mA. How can it be converted into an ammeter of range 0 to 5A? Also determine the net resistance of the ammeter.
- A proton and an alpha particle of the same enter, in turn, a region of uniform magnetic field acting perpendicular to their direction of motion. Deduce the ratio of the radii of the circular paths described by the proton and alpha particle.
- A magnetic dipole of magnetic moment M is kept in a magnetic field B. What is the minimum and maximum potential energy? Also give the most stable position and most unstable position of magnetic dipole.
- A circular coil of n turns and radius R carries a current I. It is unwound and rewound to make another square coil of side ‘a’ keeping number of turns and current same. Calculate the ratio of magnetic moment of the new coil and the original coil.