CBSE Class 12-science Answered
I want the circuit diagrams and some information about it.
Asked by hasanali.ali986 | 20 May, 2015, 11:27: AM
Expert Answer
Here, the aim is to study the variations in the current in circuit containing LDR because of variation in
(a) Power of incandescent lamp and
(b) Distance of lamp from the LDR.
You will need the following appartus to construct the circuit and study it:
1) LDR
2) Source of different power rating
3) Wires
4) Bulb holder
5) Metre scale
6) Multimeter (a regular voltmeter is not sufficient as the readings will be small and precise)
7) Battery
The circuit for studying this is as shown below:
The procedure to be followed is:
1) Connect the circuits as shown in the figure above.
2) The readings in the multimeter should be resistance (by selecting Ohm section) and Current (by selecting μA section)
3) Note the readings of current and resistance for a particular distance and then change the distance in regular intervals and note the readings again.
4) Now, change the source and note the readings again.
You will observe the following:
1) The LDR resistance decreases with increase in intensity of light and hence the current increases.
2) The current through the circuit decreases as there is increase in distance.
Answered by Romal Bhansali | 21 May, 2015, 05:24: PM
Concept Videos
-
Electric Current
This video explains the concept of electric current. -
Drift of Electrons - Part 1
This video explain the drift speed and its dependence on the externally app... -
Compare the resistivity of conductors, insulators and s ...
Compare the resistivity of conductors, insulators and semiconductors. Study... -
About emf, potential difference & internal resistan ...
Define emf, potential difference & internal resistance. Identify factors on... -
Combination of Cells - Part 1
This video describes about the working of cells in series combination.
CBSE 12-science - Physics
Asked by mailtoanjalip2005 | 16 Mar, 2024, 08:22: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by patelnamra608 | 26 Jan, 2024, 11:01: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by smitdholakiya28 | 17 Dec, 2023, 09:37: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by shivashikhar69 | 09 Dec, 2023, 02:27: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by nikhilsai2616 | 19 Nov, 2023, 01:05: AM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by snehashiragannavar773 | 21 Oct, 2023, 02:38: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by dr.strange45678 | 02 Aug, 2023, 12:31: PM
ANSWERED BY EXPERTCBSE 12-science - Physics
Asked by komalbrar0987 | 17 May, 2023, 06:15: PM
ANSWERED BY EXPERT
CBSE 12-science - Physics
Asked by amanpanday6384 | 22 Dec, 2022, 12:42: PM
ANSWERED BY EXPERT
