Answer:
Explanation:
If I am not wrong
current = charge/time
All you have to take care of is the units should be in the same system
so
current = 12/(2*60) --------- 2 min = 2*60 sec
current = 12/120 = 0.1 amp
Answer:
Explanation:
The equation for the electric field is
so filling in:
which in the end gives you
E = 7.4 × 10¹¹, choice A
Answer:
The energy is dissipated in the resistor at the rate of 0.482 W
Explanation:
Given :
Potential difference resistor 12 V
Energy dissipated in the resistor 0.630 W
New potential difference 10.5 V
We know that energy dissipated per unit time through resistor is given by,
⇒
Rate of energy dissipated is proportional to the square of the applied potential.
So for new potential we can write,
W
So new rate of energy dissipation is 0.482 W
Answer:
Kinetic energy of the electron
Explanation:
It is given that,
Initial speed of an electron, u = 660000 m/s
Final speed of the electron, v = 0 (at rest)
The kinetic energy of an electron is possessed due to the motion of an electron. The mathematical formula for the kinetic energy is given by :
m is the mass of electron
Since,
So, the initial kinetic energy of the electron is 1.23 eV. Hence, this is the required solution.
None of these is a Physics problem. The numbers, and the fractions that
they appear in, might have come from Physics problems, but these are
nothing more than arithmetic exercises, and they can be whipped out
in a hurry with a little bit of fancy calculator work. You don't have to
know any Physics in order to answer any of these.
The first one is 2.7 x 10⁻²⁴ Newton.