Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

Why the emf of the driver cell in the potentiometer experiment is greater than the emf of the cell to be measured?
Asked by Topperlearning User | 28 Apr, 2015, 10:29: AM
answered-by-expert Expert Answer

The emf of the driver cell in the potentiometer experiment is greater than the emf of the cell to be measured because , If not, then there will be a small potential difference across the potentiometer wire and balancing point will not be obtained.

Answered by | 28 Apr, 2015, 12:29: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Physics
 How does the balancing length of a potentiometer change on increasing the resistance offered by the rheostat that is connected in series with the primary cell. *
Asked by imranhussain3273 | 23 Sep, 2021, 01:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
the instrument based on null deflection method is
Asked by sampathsanjaykalla | 01 May, 2020, 09:34: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
1 kilo watt = ?
Asked by ransinghkanoh | 18 Mar, 2019, 11:04: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
WHY CURRENT  OF  220V  IS  HARMFUL  ?
Asked by pardeepkumar2281 | 04 Oct, 2018, 09:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why can we not use rubber to make electric wires?
Asked by kv.cyfuture | 03 Sep, 2018, 12:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
Why do we prefer a potentiometer of longer length for getting the accurate readings?
Asked by Topperlearning User | 28 Apr, 2015, 09:54: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
What do you mean by sensitivity of potentiometer? How can we increase the sensitivity of potentiometer?
Asked by Topperlearning User | 28 Apr, 2015, 09:58: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
A potentiometer wire is 5 m long and a potential difference of 6 V is maintained between its ends. Find the emf of a cell which balances against a length of 180 cm of the potentiometer wire.
Asked by Topperlearning User | 28 Apr, 2015, 10:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
The potential gradient along the length of uniform wire is 20 Vm-1. The length of wire is 1m. What is the potential difference across two points on the wire separated by distance 40 cm?
Asked by Topperlearning User | 28 Apr, 2015, 10:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Physics
State the uses of potentiometer
Asked by Topperlearning User | 28 Apr, 2015, 10:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×