You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Potentiometer

The sensitivi...

Question

The sensitivity of a potentiometer can be increased by
a) increasing the series resistance in the primary circuit
b) decreasing the length of the potentiometer wire
c) using a thin and high resistivity wire as a potentiometer wire
d) increasing the length of the wire

a and c are correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

b and d are correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

b and c are correct

No worries! We‘ve got your back. Try BYJU‘S free classes today!

a and d are correct

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D a and d are correct
The sensitivity of potentiometer is inversely proportional to the potential gradient.
With increase in the series resistance the potential gradient of the wire decreases thereby helps us to measure the emf more accurately.
Increase in the length of the wire decrease the potential gradient of the wire thereby helps us to measure the emf more accurately.

Suggest Corrections

Similar questions

Q. In a potentiometer wire experiment, the emf of a battery in the primary circuit is

20 V

and its internal resistance is

5 Ω

. There is a resistance box in series with the battery and the potentiometer wire, whose resistance can be varied from

120 Ω

170 Ω

. Resistance of the potentiometer wire is

75 Ω

. The following potential differences can be measured using this potentiometer

Q. In a potentiometer wire experiment, the emf of a battery in the primary circuit is

20

Volt and its internal resistance is

5 Ω

. There is a resistance box (in series with the battery and the potentiometer wire) whose resistance can be varied from

120 Ω

170 Ω

. Resistance of the potentiometer wire is

75 Ω

. The following potential difference can not be measured using this potentiometer

Q. A

2 V

battery, a

990 Ω

resistor and a potentiometer of

2 m

length, all are connected in series of the resistance of potentiometer wire is

10 Ω

, then the potential gradient of the potentiometer wire is

Q. In a potentiometer circuit, two wires of same material of resistivity ,

ρ

one of radius of cross-section a and other of radius of cross-section 2a are joined in series. They are of length l and 2l respectively. This combination act as potentiometer wire of length 3l. The emf of the cell in primary circuit is E and internal resistance is

\frac{ρ l}{2 π a^{2}}

. This cell is connected to the potentiometer wire by a conducting wire of negligible resistance with positive terminal of the cell connected to one end (call it A) of longer wire.

The maximum voltage which can be balanced on the potentiometer wire is

Q. An ideal battery of

4 V

and resistance

R

are connected in series in the primary circuit of a potentiometer of length

1 m

and resistance

5 Ω

. The value of

R

, to given a potential difference of

5 m V

across

10 c m

of potentiometer wire is:

Join BYJU'S Learning Program

The sensitivity of a potentiometer can be increased bya) increasing the series resistance in the primary circuitb) decreasing the length of the potentiometer wirec) using a thin and high resistivity wire as a potentiometer wired) increasing the length of the wire

The sensitivity of a potentiometer can be increased by
a) increasing the series resistance in the primary circuit
b) decreasing the length of the potentiometer wire
c) using a thin and high resistivity wire as a potentiometer wire
d) increasing the length of the wire