Sign Up

Captcha Click on image to update the captcha.

Have an account? Sign In Now

Sign In

Captcha Click on image to update the captcha.

Forgot Password?

Don't have account, Sign Up Here

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

Captcha Click on image to update the captcha.

Have an account? Sign In Now

You must login to ask question.

Captcha Click on image to update the captcha.

Forgot Password?

Need An Account, Sign Up Here
Sign InSign Up

Tiwari Academy Discussion

Tiwari Academy Discussion Logo Tiwari Academy Discussion Logo

Tiwari Academy Discussion Navigation

  • NCERT Solutions
  • NCERT Books
  • CBSE Syllabus
  • Tutors
Search
Ask A Question

Mobile menu

Close
Ask a Question
  • NCERT Solutions
  • NCERT Books
  • CBSE Syllabus
  • Tutors
Home/class 12 chapter-4 physics

Tiwari Academy Discussion Latest Questions

Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis; both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire? g = 9.8 m s⁻².

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.26 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 129 Views
  • 14 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A galvanometer coil has a resistance of 15 Ω and the metre shows full scale deflection for a current of 4 mA. How will you convert the metre into an ammeter of range 0 to 6 A?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.28 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 220 Views
  • 13 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A galvanometer coil has a resistance of 12 Ω and the metre shows full scale deflection for a current of 3 mA. How will you convert the metre into a voltmeter of range 0 to 18 V?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.27 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 194 Views
  • 12 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10⁻⁵ m² , and the free electron density in copper is given to be about 10²⁹m⁻³.)

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.25 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 361 Views
  • 12 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class-11-Physics

A uniform magnetic field of 3000 G is established along the positive z-direction. A rectangular loop of sides 10 cm and 5 cm carries a current of 12 A. What is the torque on the loop in the different cases shown in Fig. 4.28? What is the force on each case? Which case corresponds to stable equilibrium?

A uniform magnetic field of 3000 G is established along the positive z-direction. A rectangular loop of sides 10 cm and 5 cm carries a current of 12 A. What is the torque on the loop in the different cases shown in Fig. 4.28? What is the force on each case? Which case corresponds to stable equilibrium?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.24 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 200 Views
  • 11 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if, (a) the wire intersects the axis, (b) the wire is turned from N-S to northeast-northwest direction, (c) the wire in the N-S direction is lowered from the axis by a distance of 6.0 cm?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.23 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 200 Views
  • 11 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

The wires which connect the battery of an automobile to its starting motor carry a current of 300 A (for a short time). What is the force per unit length between the wires if they are 70 cm long and 1.5 cm apart? Is the force attractive or repulsive?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.22 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 134 Views
  • 10 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. (a) What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero? (b) What will be the total tension in the wires if the direction of current is reversed keeping the magnetic field same as before? (Ignore the mass of the wires.) g = 9.8 m s⁻².

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.21 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 100 Views
  • 11 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

A magnetic field set up using Helmholtz coils (described in Exercise 4.16) is uniform in a small region and has a magnitude of 0.75 T. In the same region, a uniform electrostatic field is maintained in a direction normal to the common axis of the coils. A narrow beam of (single species) charged particles all accelerated through 15 kV enters this region in a direction perpendicular to both the axis of the coils and the electrostatic field. If the beam remains undeflected when the electrostatic field is 9.0 × 10⁻⁵ V m⁻¹, make a simple guess as to what the beam contains. Why is the answer not unique?

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.20 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 110 Views
  • 11 Votes
Answer
Ashok0210
Ashok0210
Asked: February 23, 2021In: Class 12 Physics

An electron emitted by a heated cathode and accelerated through a potential difference of 2.0 kV, enters a region with uniform magnetic field of 0.15 T. Determine the trajectory of the electron if the field (a) is transverse to its initial velocity, (b) makes an angle of 30º with the initial velocity.

Class 12 Physics CBSE and UP Board Moving Charges and Magnetism Chapter-4 Exercise 4.19 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-4 physicsclass 12 physicsncert class 12 moving charges and magnetism
  • 1 1 Answer
  • 149 Views
  • 11 Votes
Answer
1 2 3

Sidebar

Ask A Question

Subscribe

  • Popular
  • Answers
  • Mrinal Garg

    Which is the best website providing NCERT Solutions?

    • 100 Answers
  • Amit Sharma

    What would be the CBSE Exam 2022-2023 Date Sheet for ...

    • 26 Answers
  • Richa

    NCERT Books

    • 24 Answers
  • Nitin 44

    पुराने सिक्के खरीदने वाले के व्हाट्सएप नंबर क्या है?

    • 24 Answers
  • manishq1

    Where can I get NCERT books in PDF format?

    • 22 Answers
  • ballu
    ballu added an answer Accidentally spilling soapy water on a marble floor would generally… November 30, 2023 at 12:14 pm
  • R k Parsad
    R k Parsad added an answer (i) The substance used for whitewashing is calcium oxide, commonly… November 30, 2023 at 12:14 pm
  • ballu
    ballu added an answer Athletes utilize shoes equipped with spikes to enhance their performance… November 30, 2023 at 12:14 pm
  • ballu
    ballu added an answer Seema, pushing the heavier box, will need to apply a… November 30, 2023 at 12:14 pm
  • ballu
    ballu added an answer The difference between static and sliding friction arises from the… November 30, 2023 at 12:14 pm

Explore

  • Home
  • Questions

© 2023 Tiwari Academy. All Rights Reserved