Physics Answers

A point charge of 1x 10^-6C is at centre of Gaussian surface with cubical shape 1m on edge. Find flux through surface?

A gold nucleus emanates an electric field, holding all its electrons in place. How strong is the electric field experienced by the electron from its outermost orbital, located at 136pm? How fast is it moving on its circular orbit, assuming it has a hypothetical plane orbit? How much kinetic energy is gained by the electron?

The arrow is shot with the bow vertically upwards. The spring gives the arrow a speed of 19 m / s. How high does the arrow rise?

A passenger aircraft with a mass of 78,000 kg flies at a cruising altitude of 11,300 m at a speed of 864 km/h. How big is it

a) kinetic energy

b) potential energy in relation to the ground

c) mechanical energy?

A man is 24years older than his son.in e years times he will twice as old as his son now. How old is his father

The mean speed of the molecules of an ideal gas is −  3 1 2.0 10 ms .The radius

of a gas molecule is −  10 1.5 10 m.Calculate the (i) collision frequency, and

(ii) mean free path. It is given that n = 4  1024 m^−3.

An automobile makes a turn whose radius 18 m. The road is banked at an angle of

10^o when the friction between the tires and the road is zero. At what speed should the driver take the curve to avoid sliding off the road?

Question-5

(a)   If the electric field is zero throughout a region, must the electric potential also be zero in that region?

(b)  If two points are at the same potential, are there any electric field lines connecting them?

(c)   Is the electric potential necessarily constant over the surface of a conductor?

Question-4

(a)  Discuss how potential difference and electric field strength are related. Give an example

(b)  What is the strength of the electric field in a region where the electric potential is constant?   

(c)   What is the relationship between voltage and energy? More precisely, what is the relationship between potential difference and electric potential energy?

You are given two capacitors, C1 and C2, in which C1 > C2. Define according to your understanding that how could things be arranged so that C2 could hold more charge than C2?