12th Class Fsc Physics Online Preparation

Online Short Questions For Chapter 3 "12th Class Physics Chapter 3 Short Questions Preparation "

Try The Short Questions For 12th Class Physics Chapter 3 Short Questions Preparation

  • Total Questions10

  • Available Sets4

Start Test Download PDF

Physics - 12th Class Physics Chapter 3 Short Questions Preparation

Question # 1

Define Lorentz Force.

  • Ans 1: The combined effect of electric force and magnetic force exerted on charged particle is called Lorentz force.
Submit

Prepare Complete Set Wise Questions For Chapter 3 "12th Class Physics Chapter 3 Short Questions Preparation "

12th Class Physics Chapter 3 Short Questions Preparation - Set 1

Question # 1

Define Lorentz Force.

  • Ans 1: The combined effect of electric force and magnetic force exerted on charged particle is called Lorentz force.
Submit

12th Class Physics Chapter 3 Short Questions Preparation - Set 2

Question # 1

Why soft iron cylinder is placed inside the coil of galvanometer?

  • Ans 1: The soft iron cylinder makes the magnetic field stronger and radial such that into whatever position the coil rotates,the magnetic field is always parallel to its plane.
Submit

12th Class Physics Chapter 3 Short Questions Preparation - Set 3

Question # 1

What should be orientation of a current carrying coil in magnetic field so that the torque acting upon the coil is (a) maximum (b)minimum.

  • Ans 1: The torque experienced by a current carrying loop when placed in magnetic field is t=NIBA cos alpha.
    When plane of the coil makes and angle of 0 degree with magnetic field ,the torque on the coil will be maximum.t=NIBA.
    When plane of the coil makes and angle of 90 degree with magnetic field the torque on the coil will be zero or minimum.
    t=NIBA cos 90 degree
    t=0.

Submit

12th Class Physics Chapter 3 Short Questions Preparation - Set 4

Question # 1

How the beam of electron is focused on the screen of CRO?

  • Ans 1: CRO works by deflecting beam of electrons as they pass through uniform electric field between the two sets of parallel plates,The deflecting beam then falls on a fluorescent screen where it makes a visible spot.
Submit

ic-science-white
Physics
14th Chapter

12th Class Physics Ch 14 Preparation

Here you can prepare 12th Class Physics Chapter 14 (electromagnetism ) . Click the button for 100% free full practice .

Start Chapter 14 Preparation

Is this page helpful?