Answer:
E = 2.84 x 10⁵ N/ C
Explanation:
given,
initial speed of electron,u = 2 x 10⁷ m/s
final speed of electron, v = 4 x 10⁷ m/s
distance = 1.2 cm
electric field strength = ?
using equation of motion for acceleration of electron
v² = u² + 2 a s


a = 5 x 10¹⁶ m/s²
now,
Force of electric field is equal to , F = q E
and we also know that F = m a
now,

where q is the charge of electron = 1.6 x 10⁻¹⁹ C
m is mass of electron, m = 9.1 x 10⁻³¹ Kg
so,

E = 2.84 x 10⁵ N/ C
the electric field strength is equal to E = 2.84 x 10⁵ N/ C
Answer:
Net capacitance
=
let net capacitance be R
1/R = 1/10+1/10
1/R=2/10
1/R=1/5
cross mutiply
R=5
the net capacitance is 5ohms
E = I R
Voltage = (current)×(resistance).
V = 5A x 5 ohms = 25 volts.
Answer:
3.31m/s
Explanation:
Angular momentum for 3s is



Moment if inertia is


Angular speed
ω = L/I

The speed of each ball is
V = ωL

Answer: Not 100% sure but I think it’s C.
Hope this helps! ^^