CBSE Class 12 Physics EMI and AC Assignment

Read and download free pdf of CBSE Class 12 Physics EMI and AC Assignment. Get printable school Assignments for Class 12 Physics. Class 12 students should practise questions and answers given here for Chapter 6 Electromagnetic Induction Physics in Class 12 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 12 Physics prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 12 Physics Chapter 6 Electromagnetic Induction

Class 12 Physics students should refer to the following printable assignment in Pdf for Chapter 6 Electromagnetic Induction in Class 12. This test paper with questions and answers for Class 12 Physics will be very useful for exams and help you to score good marks

Chapter 6 Electromagnetic Induction Class 12 Physics Assignment

EMI And AC MCQ Questions with Answers Class 12 Physics

Question- An ideal capacitor of capacitance 0.2μF is charged to a potential difference of 10 V. The charging battery is then disconnected. The capacitor is then connected to an ideal inductor of self inductance 0.5 mH. The current at a time when the potential difference across the capacitor is 5 V, is : 
(a) 0.34 A
(b) 0.25 A
(c) 0.17 A
(d) 0.15 A
Ans-(c)
 
Question- Microwave oven acts on the principle of :
(a) transferring electrons from lower to higher energy levels in water molecule
(b) giving rotational energy to water molecules
(c) giving vibrational energy to water molecules
(d) giving translational energy to water molecules
Ans-(c)
 
Question- For LED’s to emit light in visible region of electromagnetic light, it should have energy band gap in the range of: 
(a) 0.9 eV to 1.6 eV
(b) 0.1 eV to 0.4 eV
(c) 1.7 eV to 3.0 eV
(d) 0.5 eV to 0.8 eV
Ans-(c)
 
Question-A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100 W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 5 m from the lamp will be nearly. 
(a) 2.68 V/m
(b) 1.34 V/m
(c) 4.02 V/m
(d) 5.36 V/m
Ans-(a)
 
Question-Long range radio transmission is possible when the radiowaves are reflected from the ionosphere. For this to happen the frequency of the radiowaves must be in the range : 
(a) 8 – 25 MHz
(b) 80 – 150 MHz
(c) 150 – 500 kHz
(d) 1 – 3 MHz
Ans-(a)
 
Question- If denote microwaves, X rays, infrared, gramma rays, ultraviolet, radio waves and visible parts of the electromagnetic spectrum by M, X, I, G, U, R and V, the following is the arrangement in ascending order of wavelength :
(a) I, M, R, U, V, X and G
(b) R, M I, V, U, X and G
(c) M, R, V, X, U, G and I
(d) G, X U, V, I, M and R
Ans-(d)
 
Question- An arc lamp requires a direct current of 10 A at 80 V to function. If it is connected to a 220 V (rms), 50 Hz AC supply, the series inductor needed for it to work is close to :
(a) 0.08 H
(b) 0.044 H
(c) 0.065 H
(d) 80 H
Ans-(c)
 
Question- During the propagation of electromagnetic waves in a medium :
(a) Electric energy density is half of the magnetic energy density.
(b) Electric energy density is equal to the magnetic energy density.
(c) Both electric and magnetic energy densities are zero.
(d) Electric energy density is double of the magnetic energy density.
Ans-(b)
 
Question-The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field stength is 
(a) 3V/m
(b) 6V/m
(c) 9V/m
(d) 12V/m
Ans-(b)
 
Question- An ideal coil of 10 H is connected in series with a resistance of 5Ω and a battery of 5 V. 2 s after the connection is made,the current flowing (in ampere) in the circuit is
(a) (1 – e)
(b) e
(c) e –1
(d) (1 – e–1)
Ans-(d)
 
Question-A long solenoid has 200 turns/cm and carries a current I. The magnetic field at its centre is 6.28 × 10–4 Wb/m2. Another long solenoid has 100 turns/cm and it carries a current 1/3.The value of the magnetic field at its centre is
(a) 1.05 × 10–2 Wb/m2
(b) 1.05 × 10–5 Wb/m2
(c) 1.05 × 10–3 Wb/m2
(d) 1.05 × 10–4 Wb/m2
Ans-(d)
 
Question- Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
(a) the rates at which currents are changing in the two coils
(b) relative position and orientation of the two coils
(c) the materials of the wires of the coils
(d) the currents in the two coils
Ans-(b)
 
Question-When the current changes from + 2 A to –2 A in 0.05 s, an emf of 8 V is induced in a coil. The coefficient of selfinduction of the coil is 
(a) 0.2 H
(b) 0.4 H
(c) 0.8 H
(d) 0.1 H
Ans-(d)
 
Question-If a current is passed through a spring then the spring will 
(a) expand
(b) compress
(c) remain same
(d) None of the above
Ans-(b)
 
Question-A physicist works in a laboratory where the magnetic field is 2 T. She wears a necklace enclosing area 0.01 m2 in such a way that the plane of the necklace is normal to the field and is
having a resistance R = 0.01 Ω. Because of power failure, the field decays to 1 T in time 10–3 seconds. Then what is the total heat produced in her necklace ? (T = Tesla)
(a) 10 J
(b) 20 J
(c) 30 J
(d) 40 J
Ans-(a)
 
Question- Two identical coaxial circular loops carry current i each circulating in the clockwise direction. If the loops are approaching each other, then
(a) Current in each loop increases
(b) Current in each loop remains the same
(c) Current in each loop decreases
Ans-(c)
 
Question- A conducting ring of radius 1 meter is placed in an uniform magnetic field B of 0.01Telsa oscillating with frequency 100Hz with its plane at right angles to B. What will be the maximum induced electric field
(a) πvolt/m
(b) 2volt/m
(c) 10volt/m
(d) 62volt/m
Ans-(a)
 
Question-A coil has an inductance of 0.7 H and is joined in series with a resistance of 220 Ω. When an alternating emf of 220 V at 50 cps is applied to it, then the wattless component of the current in the circuit is
(a) 5A
(b) 0.5 A
(c) 0.7 A
(d) 7 A
Ans-(b)
 
Question- An rms voltage of 110 V is applied across a series circuit having a resistance 11 Ω and an impedance 22 Ω. The power consumed is
(a) 275 W
(b) 366 W
(c) 550 W
(d) 1100 W
Ans-(a)


More question-

 

Q1- Two identical loops,one of copper and another of constanton,are removed from a magnetic field within the same time interval.In which loop the induced current will be greater?

Q2- 

CBSE Class 12 Physics EMI and AC Assignment

B In the wire AB current is decreasing.What is the directrion of induced Current in the square loop?

Q3- Define the term self inductance. Write its SI unit.

Q4- Find the capacitance of the capacitor that would have the reactance of 100ohm when used with an ac source of frequency5/π KHZ.

Q5- Current and voltage in the circuit are I=10 Sin 314t and V=50 Sin (314t + π/2)V. What is the power dissipation in the circuit?

Q6- A conducting rod of length l,with one end pivoted, is rotated with a uniform angular speed w in a vertical plane, normal to the uniform magnetic field B. Deduce an expression for the emf induced in this rod.

Q7.- 

CBSE Class 12 Physics EMI and AC Assignment-


(A) Find the induced current in the circuit. R L V (B) Find the minimum force required for pulling the Sliding arm with constant speed v.

Q8. An electric heater is connected ,turn by turn, to a dc and ac sources of equal voltages. Will the rate of heat production be same in two cases? Explain.

Q9- Prove that in a series LCR circuit, the power dissipated depends not only on the voltage and current but also on the cosine of the phase angle Φ between these two

Q10- Prove that on applying an ac across an inductor voltage leads to current by phase π/2 radian.

Q11. An alternating voltage of frequency f is applied across a series LCR circuit.Let fr be the resonance frequency.Will the current in the circuit lag,lead or remain in phase with the applied voltage when (a)f>fr (b) f < fr Explain your answer in each case.

 

Please refer to the link below for CBSE Class 12 Physics EMI and AC Assignment-


Chapter 01 Electric Charges and Fields
CBSE Class 12 Physics Electric Charges And Field Assignment
Chapter 02 Electrostatic Potential and Capacitance
CBSE Class 12 Physics Electric Potential and Capacitance Assignment
CBSE Class 12 Physics Electrostatics Assignment
CBSE Class 12 Physics Electrostatics Notes and Questions
CBSE Class 12 Physics Electrostatistics Assignment
Chapter 03 Current Electricity
CBSE Class 12 Physics Current Electricity Assignment Set A
CBSE Class 12 Physics Current Electricity Assignment Set B
CBSE Class 12 Physics Current Electricity Assignment Set C
CBSE Class 12 Physics Current Electricity Assignment Set D
CBSE Class 12 Physics Current Electricity Notes and Questions
Chapter 04 Moving Charges and Magnetism
CBSE Class 12 Physics Magnetic Effect Assignment
CBSE Class 12 Physics Magnetic Effects of Current Assignment
CBSE Class 12 Physics Moving Charges And Magnetism Assignment
Chapter 05 Magnetism and Matter
CBSE Class 12 Physics Magnetic Effect of Current and Magnetism Assignment
Chapter 06 Electromagnetic Induction
CBSE Class 12 Physics Electromagnetic Induction Alternating Currents Assignment
CBSE Class 12 Physics Electromagnetic Induction Assignment
CBSE Class 12 Physics EMI and AC Assignment
Chapter 08 Electromagnetic Waves
CBSE Class 12 Physics Electromagnetic Waves Assignment Set A
CBSE Class 12 Physics Electromagnetic Waves Assignment Set B
Chapter 09 Ray Optics and Optical Instruments
CBSE Class 12 Physics Optics Assignment
CBSE Class 12 Physics Optics Assignment Set A
CBSE Class 12 Physics Optics Assignment Set B
Chapter 10 Wave Optics
CBSE Class 12 Physics Ray and Wave Optics Assignment
Chapter 11 Dual Nature of Radiation and Matter
CBSE Class 12 Physics Dual Nature of Matter Assignment
CBSE Class 12 Physics Dual Nature of Matter and Radiation Assignment
CBSE Class 12 Physics Dual Nature Nucleus and Atom Assignment
Chapter 12 Atoms
CBSE Class 12 Physics Atoms and Nuclei Assignment Set A
CBSE Class 12 Physics Atoms and Nuclei Assignment Set B
Chapter 13 Nuclei
CBSE Class 12 Physics Nuclei Assignment
Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits
CBSE Class 12 Physics Electronic Devices Assignment Set A
CBSE Class 12 Physics Electronic Devices Assignment Set B
CBSE Class 12 Physics Semiconductor Assignment
Chapter 15 Communication Systems
CBSE Class 12 Physics Communication and Emw Assignment
CBSE Class 12 Physics Communication Systems Assignment Set A
CBSE Class 12 Physics Communication Systems Assignment Set B
Class 12 Physics Assignments
CBSE Class 12 Physics Electrostat Assignment Set A
CBSE Class 12 Physics Electrostat Assignment Set B
CBSE Class 12 Physics Frequently asked questions in examinations
CBSE Class 12 Physics Graded Exercise Questions
CBSE Class 12 Physics Revision Assignment Set A
CBSE Class 12 Physics Revision Assignment Set B
CBSE Class 12 Physics Revision Assignment Set C
CBSE Class 12 Physics Revision Assignment Set D
CBSE Class 12 Physics Revision Assignment Set E
CBSE Class 12 Physics Revision Assignment Set F
CBSE Class 12 Physics Revision Assignment Set G
CBSE Class 12 Physics Revision Assignment Set H
CBSE Class 12 Physics Revision Assignment Set I
CBSE Class 12 Physics Revision Assignment Set J
CBSE Class 12 Physics Revision Assignment Set K
Optics Formulae
CBSE Class 12 Physics Optics Formulae Assignment

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CBSE Class 12 Physics Chapter 6 Electromagnetic Induction Assignment

We hope you liked the above assignment for Chapter 6 Electromagnetic Induction which has been designed as per the latest syllabus for Class 12 Physics released by CBSE. Students of Class 12 should download and practice the above Assignments for Class 12 Physics regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 12 Physics practice sheet in Pdf. All questions have been designed for Physics by looking into the pattern of problems asked in previous year examinations. 

Assignment for Physics CBSE Class 12 Chapter 6 Electromagnetic Induction

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Chapter 6 Electromagnetic Induction Assignment Physics CBSE Class 12

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Chapter 6 Electromagnetic Induction Assignment CBSE Class 12 Physics

Regular assignment practice helps to get a more comprehensive understanding of Chapter 6 Electromagnetic Induction concepts. Assignments play a crucial role in understanding Chapter 6 Electromagnetic Induction in CBSE Class 12. Students can download all the assignments of the same chapter in Class 12 Physics in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Physics Class 12 Chapter 6 Electromagnetic Induction Assignment

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Where can I download in PDF assignments for CBSE Class 12 Physics Chapter 6 Electromagnetic Induction

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The Chapter 6 Electromagnetic Induction Class 12 Physics Assignments have been designed based on latest CBSE syllabus for Class 12 Physics issued for the current academic year

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