Two similar charges each of one coulomb placed in air one meter apart repel each other with a force______________?
A. 9 x 109N
B. 9.2 x 104N
C. 9 x 109N
D. 9 x 107N
A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?
A closed surface contains two equal and opposite charges. The net electric flux from the surface will be________________?
A. negative
B. positive
C. zero
D. data is insufficient
Electric intensity being a vector quantity always points_______________?
Electric intensity being a vector quantity always points_______________?
A. along the direction of force experienced by a unit positive charge
B. opposite to the direction of force experienced by a unit positive charge
C. perpendicular to the direction of force experienced by a uit positive charge
D. any of above
An electric charge at rest produces_______________?
An electric charge at rest produces_______________?
A. only a magnetic field
B. only an electric field
C. neither electric field nor magnetic field
D. both electric and magnetic fields
The force per unit charge is know as__________________?
The force per unit charge is know as__________________?
A. electric flux
B. electric intensity
C. electric potential
D. all of above are same
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will_______________?
A. decrease
B. increase
C. remain constant
D. depends upon composition of dielectric
The minimum charge on any object cannot be less than_______________?
The minimum charge on any object cannot be less than_______________?
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 9.1 x 109C
D. no definite value exist
When we rub a glass rod with a silk cloth then________________?
When we rub a glass rod with a silk cloth then________________?
A. glass rod acquires negative charge while silk acquires positive charge
B. glass rod acquires positive charge while silk acquires negative charges
C. both glass rod and silk acquire negative charge
D. both glass rod and silk acquire positive charge
A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?
A coil of wire is arranged with its plane perpendicular to a uniform magnetic field o flux density B. when the radius of the coil increases from r1 to r2 in time Δt then what is the emf induced in the coil ?
A. ωB/r22-r12/Δt
B. ωB(r2-r1)2/Δt
C. ωB(r22-r12)/Δt
D. ωB(r22+r12)/Δt
Self-inductance of a long solenoid is______________?
Self-inductance of a long solenoid is______________?
A. μoN2A
B. μoN2/A
C. μoN2
D. BA