English

Choose the correct option. Inside a bar magnet, the magnetic field lines

Advertisements
Advertisements

Question

Choose the correct option.

Inside a bar magnet, the magnetic field lines

Options

  • are not present

  • are parallel to the cross-sectional area of the magnet

  • are in the direction from N pole to S pole

  • are in the direction from S pole to N pole

MCQ
Advertisements

Solution

Inside a bar magnet, the magnetic field lines are in the direction from S pole to N pole.

shaalaa.com
  Is there an error in this question or solution?
Chapter 12: Magnetism - Exercises [Page 228]

APPEARS IN

Balbharati Physics [English] Standard 11 Maharashtra State Board
Chapter 12 Magnetism
Exercises | Q 1. (iv) | Page 228

RELATED QUESTIONS

Magnetic lines of force are closed continuous curves.


Write any three properties of magnetic lines of force.


How are the magnetic field lines different from the electrostatic field lines?


Predict the polarity of the capacitor in the situation described below :


Answer the following question in detail.

Two bar magnets are placed on a horizontal surface. Draw magnetic lines around them. Mark the position of any neutral points (points where there is no resultant magnetic field) on your diagram.


A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 × 10–2 J. What is the magnitude of magnetic moment of the magnet?


A closely wound solenoid of 800 turns and area of cross-section 2.5 × 10–4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?


A closely wound solenoid of 2000 turns and area of cross-section 1.6 × 10-4 m2 , carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane.

What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10-2 T is set up at an angle of 30° with the axis of the solenoid?


If the bar magnet is turned around by 180°, where will the new null points be located?


Which of the following statements about bar magnet is correct?


Which of the following statement about magnetic field lines is true?


In which case of comparing solenoid and bar magnet there is no exact similarity?


The ratio of magnetic fields due to a smaller bar magnet in the end on position to broad side on position is ______.

Four point masses, each of value m, are placed at the comers of a square ABCD of side L, the moment of inertia of this system about an axis through A and parallel to BD is ______.


The resistance of ideal voltmeter is


At a certain 100 p of reduces 0.0/57 m carrier a current of 2 amp. The magnetic field at the centre of the coop is [`mu_0 = 4pi xx 10^-7` wb/amp – m]


A magnetic needle suspended freely orients itself:-


Magnetic dipole moment is a ______


A toroid of n turns, mean radius R and cross-sectional radius a carries current I. It is placed on a horizontal table taken as x-y plane. Its magnetic moment m ______.


A proton has spin and magnetic moment just like an electron. Why then its effect is neglected in magnetism of materials?


Suppose we want to verify the analogy between electrostatic and magnetostatic by an explicit experiment. Consider the motion of (i) electric dipole p in an electrostatic field E and (ii) magnetic dipole m in a magnetic field B. Write down a set of conditions on E, B, p, m so that the two motions are verified to be identical. (Assume identical initial conditions.)


A bar magnet of magnetic moment m and moment of inertia I (about centre, perpendicular to length) is cut into two equal pieces, perpendicular to length. Let T be the period of oscillations of the original magnet about an axis through the midpoint, perpendicular to length, in a magnetic field B. What would be the similar period T′ for each piece?


There are two current carrying planar coils made each from identical wires of length L. C1 is circular (radius R) and C2 is square (side a). They are so constructed that they have same frequency of oscillation when they are placed in the same uniform B and carry the same current. Find a in terms of R.


A bar magnet is demagnetized by inserting it inside a solenoid of length 0.2 m, 100 turns, and carrying a current of 5.2 A. The coercivity of the bar magnet is ______.


In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is 9.8 × 10−6 kg m2. If the magnitude of magnetic moment of the needle is x × 10−5 Am2; then the value of ‘x’ is:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×