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WorksheetsIV Sem Compl. Physics Quiz 1
Total questions: 15
Worksheet time: 10mins
1. Millikan’s oil drop experiment showed that _____
Electric charge is of two types
Charge is quantized
Charge can neither be created nor be destroyed
Like charges repel and unlike charges attract
What force keeps an electron in its orbit around the nucleus?
Nuclear force
Electrostatic attraction of the nucleus
centrifugal force
electromagnetic force
What is the electric field at a distance of 1 m from a charge of 1 C?
9 X 109 N
9 X 10-9 N
9 X 109 N/C
9 X 10-9 N/C
Electric field lines begin on negative charges and end on positive ones. True or false
True
False
A sphere contains equal no. of +ve and -ve charges separated by random distances. What is the net flux through the surface?
10 q/ε
0
cannot be determined
may vary
What is the kinetic energy gained by an alpha particle when it moves from a point of 70 V potential to a point where the potential is 50 V?
20 eV
40 eV
20 MeV
40 MeV
How does the electric field due to a uniform surface charge vary with distance from the surface?
varies as 1/r2
varies as 1/r
does not depend on distance
varies as distance r
What is the work done in moving a charge 1 C between two points on the surface of a conducting sphere of radius 1 m?
9 X 109 J
-9 X 109 J
zero
none of these
Electric potential is given by V = 5x2 - 3y2+ 2 z2 volts. Find the electric field at (2,3,1)
20 i- 18 j+ 4k Vm
20 i- 18 j+ 4k V/m
-20 i + 18 j - 4k Vm
-20 i + 18 j - 4k V/m
What will happen to a soap bubble if it is given a charge?
It will contract
It will expand
Nothing
What is electric displacement vector D? Which is the right expression for Gauss's law in dielectrics?
D= ε0E + P, ▼.D = ρ
D= ε0E + P, ▼.D = ρ/ε0
D= ε0E, ▼.D = -ρ/ε0
D= ε0E - P,▼.D = ρ/ε0
How is the current density in a conductor related to charge density n and drift velocity v?
J = ne/v
J = nev
J= ne2v
J= nv/e
If the resistance of a coil is 8 Ω when placed in ice and 12 Ω when immersed in boiling water, what is the temperature coefficient of resistance of its material?
50 / 0C
500 / 0C
0.50 X 10-3 / 0C
5 X 10-3 / 0C
Supercondurs show .....
low resistance and magnetism
low resistance and perfect diamagnetism
zero resistance and perfect diamagnetism
zero resistance and paramagnetism
How can you convert a galvanometer into an ammeter?
By connecting a high resistance in series with it
By connecting a high resistance in parallel with it
By connecting a low resistance in series with it
By connecting a low resistance in parallel with it
