KCET 2019 | Electrostatics Question 40 | Physics

A system of two charges separated by a certain distance apart stores electrical potential energy. If the distance between them is increased, the potential energy of the system

increases in any case

decreases in any case

may increase or decrease

remains the same

KCET 2018

MCQ (Single Correct Answer)

-0

The magnitude of point charge due to which the electric field 30 cm away has the magnitude $2 \mathrm{NC}^{-1}$ will be

$2 \times 10^{-11} \mathrm{C}$

$3 \times 10^{-11} \mathrm{C}$

$5 \times 10^{-11} \mathrm{C}$

$9 \times 10^{-11} \mathrm{C}$

KCET 2018

MCQ (Single Correct Answer)

-0

A mass of 1 kg carrying a charge of 2 C is accelerated through a potential of 1 V . The velocity acquired by it is

$\sqrt{2} \mathrm{~ms}^{-1}$

$2 \mathrm{~ms}^{-1}$

$\frac{1}{\sqrt{2}} \mathrm{~ms}^{-1}$

$\frac{1}{2} \mathrm{~ms}^{-1}$

KCET 2018

MCQ (Single Correct Answer)

-0

The force of repulsion between two identical positive charges when kept with a separation $r$ in air is $F$. Half the gap between the two charges is filled by a dielectric slab of dielectric constant $=4$. Then, the new force of repulsion between those two charges becomes

$\frac{F}{3}$

$\frac{F}{2}$

$\frac{F}{4}$

$\frac{4 F}{9}$

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