physics 101

It consists of a copper plate coated with a thin layer of cuprous oxide (Cu,0). A semi transparent layer of silver is laid on this plate as shown in Fig. 9.10. When external light falls on the oxide layer, the electrons emitted from the layer move into the copper plate. Then oxide layer beco..

The algebraic sum of the currents meeting at a junction in a circuit is zero. The current flowing towards the junction is taken as positive and the current leaving the junction is taken as negative. In Fig. 7.19, /[ and 1 2 are flowing towards the junction and are taken as positiv..

the magnetometer is measured as 1 0 A '. Magnetic induction at the centre of the needle which is on the axial line at a distance'd' from the centre of the bar magnet is B 2Md . , )' ' .....(4-14) , where 'M' is the magnetic moment and '2T is the length of th'ebar magnet. From equation (4.13) B = B ..

A car of mass 1200 kg is towed up a ghat road having an angle of inclination of 30. If the coefficient of rolling friction between the tyres and the road is 0.004, find the force required to tow up the car at a uniform speed. Solution : Referring to Fig. (5.8), the force r..

If the forces that are responsible for the adsorption of absorbate molecules on the surface of the adsorbent are chemical forces (i.e. chemical bond formation type) the adsorption is called chemical adsorption or chemisorption.'* Example : Adsorption of H2 on Ni metal surface. H2 moles are h..

. For example,if the bob of a simple pendulum is displaced and released its path will gradually become shorter and shorter and after some time it will stop oscillating. We call such a motion as damped oscillatory motion. However, if the energy lost by the oscillator is replenished, its path will no..

. It represents figure of merit of the coil. Q-factor is defined as the reciprocal of the power factor 1 Zl Q-factor =-- = cos 0 R If the resistance R is small compared to reactance, then 2-factor = ZJR = Ua/R Also 2 = 2K x "m energy sotred energy dissipated per cyc..

. Then, mean free path is given by: A,] + + +.......+ N Derivation of expression for mean free path. Assume that only one molecule is in motion and all other molecules are at rest. Let d be the diameter of each molecule. The moving molecule shall collide against all those molecules whose centres li..

[E.Q][Ans. (10/7) 2, (10/19)V, (2/19) A] 40. In the circuit shown [See fig. 7.96] if R 0 is given, what value must R x have in order that the resistance between the terminals A and B shall be equal to R 0 . [E.Q][Ans. ( Rq /V3)] 41. When a resistance o..

When two or more resistances are connected as shown in Fig. 6.7, they are said to be in series. R x and R 2 are connected in series. In this case, (a) The same current I will flow through them. (b) The combined or effective resistance R = R, + R ? , as /C\iCA7/ the p..