Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 41

EASY

NEET

IMPORTANT

Earn 100

Charges $Q_{1}$ and $Q_{2}$ are at points $A$ and $B$ of a right-angled triangle $O A B$ . The resultant electric field at point $O$ is perpendicular to the hypotenuse, then $Q_{1} / Q_{2}$ is proportional to:

50% studentsanswered this correctly

Important Questions on Electrostatics

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 42

Two identical charged spheres separated by a distance repel each other with a force

F

. If

10 %

of electrons are transferred from one sphere to the other than the force between them becomes

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 43

A point charge of

50 μ C

is placed in the

X Y

plane at a location with radius vector

{\vec{r}}_{0} = 2 \hat{i} + 3 \hat{j} m

The electric field strength and its magnitude at a point with radius vector

\vec{r} = 8 \hat{i} - 5 \hat{j} m

is

(ε_{o} = 8.85 \times 10^{- 12} C^{2} N - m^{- 2})

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 44

Two metal plates having a potential difference of

800 V

are

2 cm

apart. It is found that a particle of mass

1.96 \times 10^{- 15} kg

remains suspended in the region between the plates. The charge on the particle must be (

e =

elementary charge)

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 45

A current of $10 A$ is passing through a long wire which has a semicircular loop of the radius $20 cm$ as shown in the figure. Magnetic field produced at the centre of the loop is:

Question Image

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 46

The insulation property of air breaks down at

E = 3 \times 10^{6} \frac{volt}{meter}

. The maximum charge that can be given to a sphere of diameter

5 m

is approximately (in coulombs)

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 47

A particle of mass

m

and charge

q

is placed at rest in uniform electric field

E

and then released. The kinetic energy attained by the particle after moving a distance

y

is

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 48

A pair of parallel metal plates are kept with a separation

d

. One plate is at a potential

+ V

and the other is at ground potential. A narrow beam of electrons enters the space between the plates with a velocity

v_{0}

and in a direction parallel to the plates. What will be the angle of the beam with the plates after it travels an axial distance

L

?

MEDIUM

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 12 - Electrostatics>Level 1>Q 49

A pendulum bob of mass

30.7 \times 10^{- 6} kg

and carrying a charge

2 \times 10^{- 8} C

is at rest in a horizontal uniform electric field of

20000 V / m

. The tension in the thread of this pendulum is (Take,

g = 9.8 {ms}^{2}

)