Download App

Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance1 Mark
MCQ
1 electron volt = __________ J.
  • A
    1.6 × 10-19
  • B
    4.8 × 10-19
  • C
    1.6 × 10-10
  • D
    10
✓

Answer

  1. 1.6 × 10-19

Explanation:

1 electron volt is the amount of work done if an electron is passed through a potential difference of 1V. Therefore the work done = 1V × charge of an electron = 1.602 × 10-19 J. But it is a small quantity and hence we use kilo electron volt and mega electron volt in practical.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q [1M]" from Electrostatic Potential and Capacitance→Electrostatic Potential and Capacitance — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

For which of the following particles will it be most difficult to experimentally verify the de-Broglie relationship?
→

A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2 eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector

(a) 2 photon of energy 10.2 eV

(b) 2 photon of energy of 1.4 eV

(c) One photon of energy 10.2 eV and an electron of  energy 1.4 eV

(d) One photon of energy 10.2 eV and another photon of 1.4 eV

→
Identify the correct options:
  1. An ammeter should have small resistance.
  2. An ammeter should have large resistance.
  3. A voltmeter should have small resistance.
  4. A voltmeter should have large resistance.
→
The phase angle between current and voltage in a purely inductive circuit is:
→

In the circuit shown here  and battery B = 20V. The switch  is first closed. It is then opened and afterwards   is closed. What is the charge finally on

(a) 120 μC

(b) 80 μC

(c) 40 μC

(d) 20 μC
→

While tuning in a certain broadcast station with a receiver, we are actually

(a) Varying the local oscillator frequency

(b) Varying the frequency of the radio signal to be picked up

(c) Tuning the antenna

(d) None of these

→

A plane mirror reflecting a ray of incident light is rotated through an angle θ about an axis through the point of incidence in the plane of the mirror perpendicular to the plane of incidence, then

(a) The reflected ray rotates through an angle 2θ

(b) The incident ray is fixed
(c) The reflected ray does not rotate
(d) a, b
→
In angle of prism and angle of minimum deviation each is A then the refractive index of the material of the prism will be :
→

Hubble showed that the universe as a whole is expanding and the distant stars are receding from us. The spectral line from a star, when compared with the corresponding line from an source will then show

(a) A shift in frequency towards the red end

(b) A shift in frequency towards the violet end

(c) No shift in frequency at all

(d) A shift in frequency towards the violet end as well as a decrease in intensity

→
In broad-side-on position, the electric potential due to electric dipole is :
→