MCQ
Calculate the value of current I4.
- A-9A
- B9A
- C5A
- D1A
✓
Answer
- 9A
Explanation:
Current I4 can be calculated using Kirchhoff’s first law. The sum of current arriving at a junction is equal to the currents leaving the junction.
Here, Currents arriving at a junction: 7A + 5A = 12A
Currents leaving the junction: 3A + I4
Equating both the currents: 12A = 3A + I4
I4 = 9A
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
In Young's double-slit experiment, the sodium lamp is replaced by a blue light lamp, then :
The thinnest bubble film in air that can possibly strongly reflect red light because of constructive interference makes up a certain bubble. How could we create the thinnest bubble film that will strongly reflect purple light?
A photon in motion has a mass
|
(a) c/hv |
(b) h/v |
(c) hv |
(d) |
In Young’s double slit experiment, distance between two sources is 0.1 mm. The distance of screen from the sources is 20 cm. Wavelength of light used is 5460 Å. Then angular position of the first dark fringe is
|
(a) 0.08° |
(b) 0.16° |
(c) 0.20° |
(d) 0.313° |
In image formation from spherical mirrors, only paraxial rays are considered because they:
There are three resistance coils of equal resistance. The maximum number of resistances you can obtain by connecting them in any manner you choose, being free to use any number of the coils in any way is
|
(a) 3 |
(b) 4 |
(c) 6 |
(d) 5 |
Water equivalent of a body is measured in:
- Kg
- Calorie
- Kelvin
- m3
A charged conductor has its charge only on its outer surface. This statement is true for which of the following?
A zone plate of focal length 60 cm, behaves as a convex lens, If wavelength of incident light is 6000
, then radius of first half period zone will be
|
(a) 36 |
(b) 6 |
(c) |
(d) 6 |
Name the unit of electrical potential: