Please Login To Continue
Atmospheric Electricity (in hindi)
Lesson 16 of 25 • 0 upvotes • 14:22mins
Rajesh Kumar
Top layer of atmosphere of conducting nature is about 50 km above earth surface. Electric field between top layer and surface is 100V/m. Potential of top layer of atmosphere is 400KV. Earth surface is negatively charged <1nano coulomb per square meter. Thunderstorm is a packet of air,water drops and ice particles. Air particles ionised by Cosmic rays . These ions creation and thunderstorm stroke still going on in atmosphere which maintains potential difference of 400 KV between earth surface and top of atmosphere. Clouds makes 3-4km above the earth surface these clouds spread about 7-8 km and thickness about 3km. Clouds upper part excess positively charged and Lower particle excess negative charge which create electric field in clouds of 20to 100MV. This high field sufficient to electric breakdown of air and hence lightining will occurs then -be charge moves to earth surface and positive charge go up to top atmospheric surface . And hence earth surface maintained at -Ve charge. In clear sky + ve charge go to earth surcease and - ve charge go to atmosphere. 5sec will take to make thunderstorm.
(Hindi) Electric Current in Conductor for Class XII Physics
25 lessons • 4h 25m
1
Course Overview : Electric Current in Conductor (in Hindi)
7:43mins
2
Drift Speed (in Hindi)
10:00mins
3
Ohm’s Law and Colour Code of Resistor (in Hindi)
11:08mins
4
Temperature Dependence of Resistivity, Thermistor and Superconductors (in Hindi)
13:46mins
5
Battery and EMF (Hindi)
12:37mins
6
Energy Transfer in an electric circuit (in Hindi)
8:06mins
7
Internal Resistance of a Battery (in Hindi)
9:06mins
8
Kirchhoff’s law (in Hindi)
12:44mins
9
Combination of resistors in series & parallel(in hindi)
12:17mins
10
Grouping of Batteries (in hindi)
12:22mins
11
Wheatstone bridge (in hindi)
8:48mins
12
Ammeter and voltmeter (in Hindi)
11:15mins
13
Strectched wire Potentiometer ( in hindi)
11:58mins
14
Comparison of emf of two batteries and measurement of internal resistance of a battery (in hindi)
8:58mins
15
Charging and discharging of capacitors (in hindi)
12:05mins
16
Atmospheric Electricity (in hindi)
14:22mins
17
Objective I ,numericals Q no. 1-5, H C Verma vol.2 (in hindi)
8:53mins
18
Objective I numericals from q no. 6-9 ,H C Verma (in hindi)
6:17mins
19
Objective numericals I from q no.10-12 ,H C Verma (in hindi)
6:19mins
20
Objective numericals I from q no.13-16, H C Verma (in hindi)
10:49mins
21
Electric current and current density (in hindi)
9:29mins
22
Objective numericals II ,from q no.01-06, H C Verma vol.II (in hindi)
12:20mins
23
Objective numericals II, from q no.07-09, H C Verma (in hindi)
10:07mins
24
Summary of electric current in conductor(inHindi)-01
15:00mins
25
Summary of electric current in conductor (in hindi)-02
8:21mins
Crack CBSE Class 12 with Unacademy
Get subscription and access unlimited live and recorded courses from India's best educators
Structured syllabus
Daily live classes
Ask doubts
