PGT Physics Teacher Interview Questions and Answers

Moment of inertia is the measure of an object's resistance to rotational motion.

• Moment of inertia depends on the mass and distribution of mass of an object.

• It is denoted by the symbol 'I' and has units of kg m².

• Objects with larger moment of inertia require more torque to rotate.

• Moment of inertia plays a crucial role in understanding rotational motion and is used in various fields such as physics, engineering, and astronomy.

• Examples of moment of inertia include a spinning top,...read more

Electric field is a region around a charged particle where it exerts a force on other charged particles.

• Electric field is a vector quantity.

• It is measured in Newtons per Coulomb (N/C).

• Electric field intensity is the magnitude of the electric field at a particular point.

• It is given by the formula E = F/q, where F is the force exerted on a charge q by the electric field.

• Electric field lines show the direction of the electric field.

• Example: A positively charged particle creates ...read more

EM waves are transverse as the electric and magnetic fields oscillate perpendicular to the direction of wave propagation.

• EM waves are characterized by their electric and magnetic fields which are perpendicular to each other and to the direction of wave propagation.

• This can be observed in the behavior of polarized light, where the electric field oscillates perpendicular to the direction of propagation.

• EM waves can also be demonstrated to be transverse through experiments such ...read more

A physical quantity is a property that can be measured and expressed in numerical terms.

• Physical quantities are measurable properties of matter or energy.

• They can be expressed in numerical terms and have units of measurement.

• Examples include length, mass, time, temperature, and electric charge.

• Physical quantities can be scalar or vector quantities.

• Scalar quantities have only magnitude while vector quantities have both magnitude and direction.