Physics, asked by nskksoss, 9 months ago

what is a metre Bridge.?

Answers

Answered by Anonymous
5
\Large\underline\mathfrak{Question}

What is a metre Bridge.?

\rule{200}{4}

\bold{\boxed{\large{\boxed{\orange{\small{\boxed{\large{\red{\bold{\:ANSWER}}}}}}}}}}

→ From the Diagram.

\Large\bold\star\underline{\underline\textbf{Meter bridge\:}}

→ A metre bridge is a practical form of wheatstone bridge.

→ Wheatstone bridge is an arrangement of four resistance is used for measuring one unknown resistance in terms of other three residences.

\rule{200}{4}

\Large\bold\star\underline{\underline\textbf{Circuit arrangement\:}}

→ Check the Diagram first given with this answer.

» It consists of a wire AC of constantan or manganin of 1 metre length and uniform cross section area.

» This wire is stretched between the copper strips on a horizontal wooden board.

» A metre scale is fixed on the wooden board parallel to the length of the wire.

» A resistance box R is connected as shown in the figure. An unknown resistance S is also connected.

» A Jockey is slided on the wire. One terminal of the Jockey is connected to the galvanometer and another terminal is connected to terminal D.

\rule{200}{4}

\Large\bold\star\underline{\underline\textbf{How it works\:}}

» First close the key K and adjust the value of resistance box for a suitable resistance R.

» Move the jockey on the wire till the galvanometer gives zero deflection.

» Note the length AB.
(Also note the length BC of the wire).

→ Let AB = l , BC = 100 - l

→ Now , according to the weightstone bridge principle,

P / Q = R / S

→ Where,

» P = resistance of the length ( l ) of the wire = lr

» Q = resistance of the length ( 100-l ) of the wire = ( 100-l ) r

r = resistance per unit length of the wire.

→ So ,
lr / ( 100-l ) r = R / S

→ S = ( 100- l / l ) x R

Hope it helped u.

\huge\bold{\red{\ddot{\smile}}}
Attachments:
Answered by sachindeo098
3

Answer:

Meter Bridge is an instrument that is used to find the unknown resistance of a coil or any other material. This bridge works under the principle of Wheatstone bridge.

Similar questions