Question
An electron gun emits 2.0 × 1016 electrons per second. What electric current does this correspond to?
✓
Answer
No. of electrons per second = 2 × 1016 electrons/ sec. Charge passing per second $=2\times10^{16}\times1.6\times10^{-9}\frac{\text{coulomb}}{\text{sec}}$
$=3.2\times10^{-9}$ Coulomb/ sec
Current $=3.2\times10^{-3}\text{A}.$Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
→→→→→→→
A piece of paper wrapped tightly on a wooden rod is observed to get charred quickly when held over a flame as compared to a similar piece of paper when wrapped on a brass rod. Explain why?
Suppose $\vec{\text{a}}$ is a vector of magnitude 4.5 unit due north. What is the vector:
→- $3\vec{\text{a}}$
- $-4 \ \vec{\text{a}}?$
Is nuclear mass density dependent on the mass number? $(\text{Given}: \text{r} = \text{r}_0 \text{A}^{\frac{1}{3}})$
→The electric current in a charging R-C circuit is given by $\text{i}=\text{i}_0\text{e}^{-\frac{\text{t}}{\text{RC}}}$ where $\text{i}_0,$ R and C are constant parameters of the circuit and t is time. Find the rate of change of current at
→- t = 0.
- t = RC.
- t = 10RC.
Imagine what would happen if the value of G becomes:
- 100 times of its present value.
- Times of its present value.
A spring weighing machine inside a stationary lift reads 10kg, when a man stands on it. What would happen to the scale reading, if the lift is moving upward with (i) constant velocity and (ii) constant acceleration?
If the density of a gas is kept constant but the root mean square velocity of the gas molecules is doubled, then how many times will the pressure of the gas increase?
Which of the two will increase the pressure more-an adiabatic or an isothermal process in reducing the volume to 50%?
A force F = a + bx acts on a particle in the x-direction, where a and b are constants. Find the work done by this force during a displacement from x = 0 to x = d.