English

Fill in the Blanks by Writing (I) Only Soft Iron, (Ii) Only Steel, (Iii) Both Soft-iron and Steel for the Material of Core And/Or Magnet.

Advertisements
Advertisements

Question

Fill in the blanks by writing (i) Only soft iron, (ii) Only steel, (iii) Both soft-iron and steel for the material of core and/or magnet.

A. C. generator______.

Fill in the Blanks
Advertisements

Solution

A. C. generator core- soft iron, magnet - steel

shaalaa.com
  Is there an error in this question or solution?
Chapter 4: Electricity and Magnetism - Exercise 9 [Page 217]

APPEARS IN

Frank Physics Part 2 [English] Class 10 ICSE
Chapter 4 Electricity and Magnetism
Exercise 9 | Q 2.4 | Page 217

RELATED QUESTIONS

A line charge λ per unit length is lodged uniformly onto the rim of a wheel of mass M and radius R. The wheel has light non-conducting spokes and is free to rotate without friction about its axis (Figure). A uniform magnetic field extends over a circular region within the rim. It is given by,

B = − B0 k (r ≤ a; a < R)

= 0 (otherwise)

What is the angular velocity of the wheel after the field is suddenly switched off?


Prove theoretically  (electromagnetic induction) `e = (dphi)/(dt)`


Consider the energy density in a solenoid at its centre and that near its ends. Which of the two is greater?


The following diagram shows a fixed coil of several turns connected to a center zero galvanometer G and a magnet NS which can move in the direction shown in the diagram.

  1. Describe the observation in the galvanometer if
    1. The magnet is moved rapidly,
    2. The magnet is kept still after it has moved into the coil
    3. The magnet is then rapidly pulled out the coil.
  2. How would the observation in (i) of part (a) change if a more powerful magnet is used?


State Lenz’s law.


An induced current of 2.5 mA flows through a single conductor of resistance 100 Ω. Find out the rate at which the magnetic flux is cut by the conductor.


A coil of 200 turns carries a current of 4 A. If the magnetic flux through the coil is 6 x 10-5 Wb, find the magnetic energy stored in the medium surrounding the coil.


The instrument that use to defect electric current in the circuit is known as ____________.


A coil of one turn is made of a wire of certain length and then from the same length, a coil of two turns is made. If the same current is passed in both the cases, then the ratio of the magnetic inductions at their centres will be:


An expression for oscillating electric field in a plane electromagnetic wave is given as Ez = 300 sin(5π × 103x - 3π × 1011t)Vm-1 Then, the value of magnetic field amplitude will be ______. (Given: speed of light in Vacuum c = 3 × 108 ms-1)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×