CBSE Class 12 Physics EMI And AC Worksheet

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Read and download free pdf of CBSE Class 12 Physics EMI And AC Worksheet. Students and teachers of Class 12 Physics can get free printable Worksheets for Class 12 Physics EMI And AC in PDF format prepared as per the latest syllabus and examination pattern in your schools. Class 12 students should practice questions and answers given here for Physics in Class 12 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 12 Physics Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems with solutions on daily basis to get more score in school exams and tests

Worksheet for Class 12 Physics EMI And AC

Class 12 Physics students should refer to the following printable worksheet in Pdf for EMI And AC in Class 12. This test paper with questions and answers for Class 12 will be very useful for exams and help you to score good marks

Class 12 Physics Worksheet for EMI And AC

EMI And AC MCQ Questions with Answers Class 12 Physics

Question- One tesla in equal to
(a) 107 gauss
(b) 10–4 gauss
(c) 104 gauss
(d) 10–8 gauss
Ans-(c)
 
Question- A coil of cross-sectional area 102 cm2 is is placed in the magnetic field, which changes to 4 × 10–2 Wb/cm2 within 5 sec. What will be the current across 5 Ω resistance ?
(a) 0.016 A
(b) 0.16 A
(c) 1.6 A
(d) 16.0 A
Ans-(b)
 
Question- A coil having 500 square loops of side 10 cm is placed normal to magnetic field which increases at a rate of 1 T/sec. The induced e.m.f. is
(a) 0.1 V
(b) 0.5 V
(c) 1 V
(d) 5 V
Ans-(d)
 
Question- A loop of area 0.1 m2 rotates with a speed of 60 rps perpendicular to a magnetic field of 0.4 T. If there are 100 turns in the loop, maximum voltage induced in the loop is
(a) 15.07 V
(b) 1507 V
(c) 250 V
(d) 150.7 V
Ans-(b)
 
Question- A magnet is moved towards a coil (i) quickly (ii) slowly. The induced e.m.f. is
(a) same in both
(b) more in (i) than in (ii) case
(c) smaller in (i) than in (ii) case
(d) nothing can be said
Ans-(b)
 
Question- If magnetic flux associated with a coil varies at the rate of 1 Wb/s, the induced e.m.f. is
(a) 1V
(b)108 V
(c) 10–8 V
(d) 1 mV
Ans-(a)
 
Question- A metal ring is held horizontally and a bar magnet is dropped through the ring with its length along the axis of the ring. The acceleration of the falling manget is
(a) equal to g
(b) less than g
(c) more than g
(d) depends on the diameter of ring and length of magnet Translatory motion
Ans-(b)
 
Question- A straight conductor of length 0.4 m is moved with a speed of 7 ms–1 perpendicular to a magnetic field of induction 0.9 Wb/m2. The induced e.m.f. across the conductor is
(a) 25.2 V
(b) 5.04 V
(c) 2.52 V
(d) 1.26 V
Ans-(c)
 
Question- The wing span of an aeroplane is 36 m. If the plane is flying at 400 km/h, the e.m.f. induced between the wings tips is (assume V = 4 × 10–5 T)
(a) 16 V
(b) 1.6 V
(c) 0.16 V
(d) 0.016 V
Ans-(c)
 
Question- The e.m.f. produced in a wire by its motion across a magnetic field does not depend upon
(a) The length of the wire
(b)The composition of the wire
(c) The diameter of the wire
(d) The orientation of the wire
Ans-(c)
 
Question- A car moves on a plane road. The induced e.m.f. in the axle connecting the two wheels is maximum when it moves
(a) eastward at the equator
(b) westward at the equator
(c) eastward at the latitude of 45°
(d) at the poles
Ans-(d)
 
Question- Two solenoids of same cross-sectional area have their lengths and number of turns in ratio of 1 : 2. The ratio of self-inductance of two solenoids is
(a) 1 : 1
(b) 1 : 2
(c) 2 : 1
(d) 1 : 4
Ans-(b)
 
Question- The current passing through a choke coil of 5H is decreasing at the rate of 2 As–1. The e.m.f. developed across the coil is
(a) – 10V
(b) + 10V
(c) 2.5 V
(d) –2.5 V
Ans-(a, b)
 
Question- What is the self inductance of an air core solenoid 1 m long, diameter 0.5 m, if it has 500 turns ? Take π2 = 10.
(a) 3.15 × 10–4 H
(b) 4.8 × 10–4 H
(c) 5 × 10–4 H
(d) 625 × 10–4 H
Ans-(d)
 
Question- Dimensions of self-inductance are :
(a) MLT–2 A–2
(b) ML2T–1A–2
(c) ML2T–2A–2
(d) ML2T–2A–1
Ans-(c)
 
Question- In a current carrying long solenoid, the field produced does not depend upon
(a) No. of turns per unit length
(b) current flowing
(c) Radius of solenoid
(d) All of the above there.
Ans-(c)
 
Question- For a coil having L = 2 mH, current flows at the rate of 103 ampere/sec. The emf induced is
(a) 2V
(b) 1 V
(c) 4 V
(d) 3 V
Ans-(a)
 
Question- If number of turns in primary and secondary coils in increased to two times each, the mutual inductance
(a) becomes 4 time
(b) becomes 2 time
(c) becomes 1/4 time
(d) remains unchanged
Ans-(a)
 
Question- Alternating voltage V = 400 sin (500 π t) is a applied across a resistance of 0.2 k Ω. The r.m.s. value of current will be equal to
(a) 14.14 A
(b) 1.414 A
(c) 0.1414 A
(d) 2.0 A
Ans-(b)
 
Question-In general, in an alternating current circuit
(a) the average value of current is zero
(b) the average value of square of current is zero
(c) average power dissipation is zero
(d) the phase difference between voltage and curent is zero.
Ans-(a)
 
Question- A generator produces a voltage that is given by V = 240 sin 120 t volt, where t is in second. The frequency and r.m.s. voltage are :
(a) 60 Hz. and 240 volt
(b) 19 Hz and 120 volt
(c) 19 Hz and 170 volt
(d) 754 Hz and 170 volt
Ans-(c)


More question-

1. State Faraday’s laws of EMI.

Ans: e = - dɸ/dt

2. Write S.I. unit of magnetic flux. Is it a scalar or a vector?

Ans: Weber, Scalar.

3. On what factor does the self-inductance of a solenoid depends?

Ans: (a) No of turns in the solenoid (b) Length of the solenoid (c) Core inside the solenoid(d) Area of the cross-section.

4. Define self–inductance of a coil. Give its S.I. unit.

Ans: Magnetic Flux link in the coil when unit current flows through it. SI unit is henry.

5. Define self–induction of a coil. Give one example.

Ans: The phenomenon of electric current in a coil due to growth or detail of current in the coil.

Example: Back emf of motor. 

Please click the link below to download CBSE Class 12 Physics EMI and AC Important Questions.

Chapter 01 Electric Charges And Fields
CBSE Class 12 Physics Electric Charges And Fields Worksheet Set A
CBSE Class 12 Physics Electric Charges And Fields Worksheet Set B
CBSE Class 12 Physics Electric Charges And Fields Worksheet Set C
Chapter 02 Electrostatic Potential and Capacitance
CBSE Class 12 Physics Electrostatic Potential And Capacitance Worksheet
CBSE Class 12 Physics Electrostatics Boards Questions Worksheet
CBSE Class 12 Physics Electrostatics Worksheet
Chapter 03 Current Electricity
CBSE Class 12 Physics Current Electricity Boards Questions Worksheet
CBSE Class 12 Physics Current Electricity Worksheet Set A
CBSE Class 12 Physics Current Electricity Worksheet Set B
CBSE Class 12 Physics Current Electricity Worksheet Set C
CBSE Class 12 Physics Current Electricity Worksheet Set D
Chapter 04 Moving Charges and Magnetism
CBSE Class 12 Physics Magnetic Effects Of Current Worksheet Set A
CBSE Class 12 Physics Magnetic Effects Of Current Worksheet Set B
CBSE Class 12 Physics Magnetic Effects Of Current Worksheet Set C
CBSE Class 12 Physics Magnetic Effects Of Current Worksheet Set D
CBSE Class 12 Physics Magnetism And Matter Boards Questions Worksheet
CBSE Class 12 Physics Magnetism Worksheet Set A
CBSE Class 12 Physics Magnetism Worksheet Set B
CBSE Class 12 Physics Moving Charges And Magnetism Boards Questions Worksheet
Chapter 06 Electromagnetic Induction
CBSE Class 12 Physics Electromagnetic Induction And Alternating Current Worksheet Set A
CBSE Class 12 Physics Electromagnetic Induction And Alternating Current Worksheet Set B
CBSE Class 12 Physics Electromagnetic Induction And Alternating Current Worksheet Set C
Chapter 07 Alternating Current
CBSE Class 12 Physics Alternating Current Important Questions Worksheet Set A
CBSE Class 12 Physics Alternating Current Important Questions Worksheet Set B
Chapter 08 Electromagnetic Waves
CBSE Class 12 Physics Electromagnetic Waves Boards Questions Worksheet
CBSE Class 12 Physics Electromagnetic Waves Worksheet Set A
CBSE Class 12 Physics Electromagnetic Waves Worksheet Set B
Chapter 09 Ray Optics and Optical Instruments
CBSE Class 12 Physics Ray Optics Optical Instruments Worksheet
Chapter 10 Wave Optics
CBSE Class 12 Physics Wave Optics Boards Questions Worksheet
Chapter 11 Dual Nature of Radiation and Matter
CBSE Class 12 Physics Dual Nature Of Matter And Radiation Worksheet Set A
CBSE Class 12 Physics Dual Nature Of Matter And Radiation Worksheet Set B
CBSE Class 12 Physics Dual Nature And Radiation Boards Questions Worksheet
Chapter 12 Atoms
CBSE Class 12 Physics Atoms Important Questions Worksheet
CBSE Class 12 Physics Atoms And Nuclie Boards Questions Worksheet
CBSE Class 12 Physics Atoms And Nuclie Important Questions Worksheet
CBSE Class 12 Physics Nuclei Worksheet Set A
CBSE Class 12 Physics Nuclei Worksheet Set B
Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits
CBSE Class 12 Physics Semiconductor Devices Worksheet Set A
CBSE Class 12 Physics Semiconductor Devices Worksheet Set E
Chapter 15 Communication Systems
CBSE Class 12 Physics Communication Systems Important Questions Worksheet
More Worksheets for Class 12 Physics
CBSE Class 12 Physics 1 Mark Question Bank Worksheet
CBSE Class 12 Physics 2 Mark Question Bank Worksheet
CBSE Class 12 Physics 3 Mark Question Bank Worksheet
CBSE Class 12 Physics Electric Potential And Capacitance Worksheet
CBSE Class 12 Physics EMI And AC Worksheet
CBSE Class 12 Physics Long Answer Question Bank Worksheet
CBSE Class 12 Physics Optics Worksheet Set A
CBSE Class 12 Physics Optics Worksheet Set B
CBSE Class 12 Physics Optics Worksheet Set C
CBSE Class 12 Physics Quick Revision Questions Worksheet Set A
CBSE Class 12 Physics Quick Revision Questions Worksheet Set B
CBSE Class 12 Physics Quick Revision Questions Worksheet Set C
CBSE Class 12 Physics Short Answer Question Bank Worksheet Set A
CBSE Class 12 Physics Short Answer Question Bank Worksheet Set B
CBSE Class 12 Physics Short Answer Question Bank Worksheet Set C

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CBSE Class 12 Physics EMI And AC Worksheet

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Worksheet for Physics CBSE Class 12 EMI And AC

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EMI And AC worksheet Physics CBSE Class 12

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EMI And AC CBSE Class 12 Physics Worksheet

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Worksheet for CBSE Physics Class 12 EMI And AC

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