Notes

# Bsc Physics Part 2 Full Book Mcqs

131: F = q B×V the presents the force exerted on a

a) Charge q moving with velocity v in a electric field

b) Charge q moving with velocity v in a magnetic field B

c) Both

d) None of these

132: Biot_savart’s law is expressed mathematically as

a) H

b) B ∝ Idlsin∅/r2

c) Hdl=Ienc

d) Hdl=(∇×H)ds

133: Biot_savart’s law can be applied to current carrying conductors of

a) Large length

b) Medium length

c) Small length

d) Very small length

134: potential has the unit of

a) J/C

b) Joule

c) J/m3

d) J/m2

135: according to Ampere’s circuital law, field intensity at a point at distance R from a very

long straight Fila

a) Hdl=Ienc

b) Jds=I

c) Both a & b

d) None of these

136: Ampere’s circuital law and which of the following law in electrostatics are analogous

a) Lenz’s

b) Gauss’s

c) Boit_savart’s

137: Ampere’s circuital law can be applied …… the conductor

a) Inside

b) Outside

c) Both a & b

d) None of these

138: electric intensity at any point in an electric field is equal the at that point

a) Electric flux

b) Magnetic flux density

d) None of the above

139: when a dielectric material is placed in an electrictric field it

a) Is charged

b) Get polarized

c) Remain un charged

d) Remain un polarized

140: an electromagnetic field exit only when there is

a) An increasing current

b) Decreasing current

c) Voltage

d) Current

141: when a dielectric placed in an electric field the field strength is

a) Decrease

b) Increase

c) Reduce to zero

d) Remain un changed

142: according to Ampere’s circuital law,

a) Hdl=Ienc

b)Jds=I

c) Hdl=∇×Hds

d) ∇×E=-∂B/∂t

143: a magnetic field exist around

a) Iron

b) Copper

c) Aluminium

d) Moving charge

144: electric potential V is given by

a) E=-∇V

b) V=Q/4πεr

c) Both a & b

d) None of these

145: magnetic field outside a solenoid is

a) Zero

b) Strong

c) Infinity

d) Negligible

146: the unit for permeability is

a) Wb

b) At/m

c) Web/At×m

d) At/web

147: the unit of electric dipole moment of

a) C.m

b) C/m

c) C.m2

d) C/m2

148: a field line and an equipotential of surface are

a) Always parallel

b) Always at 90 degree

c) Inclined at any angle

d) None of these

149: the force between two charge each of charge one micro colomb placed one meter aparts

in air will be

a) 9*10-12 N

b) 9*10+12 N

c) Zerod) 9*10-3 N

150: gauss law is applicable for a

a) Curved surface

b) Closed surface

c) Rectangular surface

d) Equipotential surface