UP Board Class 12 Electric Charges and Fields — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice UP Board Class 12 Electric Charges and Fields in the app →Two point charges of $+2\ \mu$C and $+3\ \mu$C are placed $30$ cm apart. The Coulomb force between them is:A point charge of $5\ \mu$C is placed at the origin. The electric field magnitude at $0.5$ m is:A dipole consists of $+q$ and $-q$ separated by distance $d$. Its dipole moment direction is:A closed surface encloses a net charge of $4\ \mu$C. The total electric flux through the surface is:The smallest charge that can exist freely in nature isTwo point charges $q_1$ and $q_2$ separated by distance $r$ in vacuum attract each other with force $F$. If boThe principle of SUPERPOSITION for electric forces states that the net force on a charge due to multiple otherAn electric dipole of dipole moment $\vec{p}$ is placed in a UNIFORM electric field $\vec{E}$. The torque expeThe electric field at a distance $r$ from a POINT charge $q$ (in vacuum) has magnitudeGauss's law in integral form states that the electric flux through a CLOSED surface equalsThe electric field just OUTSIDE a uniformly charged conducting sphere of total charge $Q$ and radius $R$, at aInside a uniformly charged conducting sphere (in equilibrium), the electric field isTwo identical small spheres carry charges $+10\,\mu\text{C}$ each and are placed $30\,\text{cm}$ apart in vacuAn ELECTRIC DIPOLE consists of charges $+q$ and $-q$ separated by a small displacement $2a$. The dipole momentThe electric field due to an INFINITELY long straight uniformly charged wire (linear charge density $\lambda$)The electric field due to an INFINITE plane sheet of uniform surface charge density $ igma$ (in vacuum) isIf a charge $q$ is placed in a medium of dielectric constant $K$ instead of vacuum, the Coulomb force between Which property is TRUE for electric field LINES?