A copper wire is wound on a wooden frame

Asked by admin @ 16/08/2021 in Physics viewed by 267 People

A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of the frame is increased by a factor of 3, keeping the number of turns of the coil per unit length of the frame the same, then self inductance of the coil:

(A) decreases by a factor of 9 (B) increases by a factor of 27
(C) increases by a factor of 3 (D) decreases by a factor of 9 3

Answered by admin @ 16/08/2021

Given:

The frame increase factor by 3

The number of coils be N

The self inductance of the coil be L

To find:

The increase the in the self inductance of the coil.

Solution:

As the self inductance is directly proportional to the frame factor

L∝ a×N

Now according to the statement a=3a

Then L ∝ 3a×NT

Which means the self inductance will increase by 3

The correct option is C, increases by factor 3

Why are copper wires used as connecting wires

Asked by admin @ 29/08/2021 in Science viewed by 337 persons

Why are copper wires used as connecting wires???

If the resistance of a certain copper wire is

Asked by admin @ 20/08/2021 in Chemistry viewed by 336 persons

If the resistance of a certain copper wire is 1 ohm, then the resistance of a similar nichrome wire will be about : Choose the option 25 ohm 30 ohm …

A rectangular coil of copper wire is rotated

Asked by admin @ 29/08/2021 in Science viewed by 292 persons

A rectangular coil of A copper wire is rotated in a magnetic field direction induced current change once in each a)two revolutionb)one revolutionc)half revolutiond)one fourth revolution

Why copper wire cannot be used as fuse wire

Asked by admin @ 23/08/2021 in Science viewed by 319 persons

Explain why A copper wire cannot be used as a fuse wire

How can we increase the size of copper wire

Asked by admin @ 23/08/2021 in Chemistry viewed by 248 persons

How can you increase the size of copper wire. Explain .

A copper wire has a resistance of 0.5 ohm

Asked by admin @ 23/08/2021 in Physics viewed by 302 persons

a copper wire has a resistance of 0.5ohm.another wire of the same mass as the first one is double in length of first.find the resistance of second wire

A conducting wire frame is placed in magnetic field

Asked by admin @ 13/08/2021 in Physics viewed by 266 persons

10. A conducting wire frame is placed in magnetic field which is directed into the paper. We increasing at a constant rate. The directions of induced current in wires AB …

A copper wire has a diameter of 0.5 mm

Asked by admin @ 12/08/2021 in Math viewed by 369 persons

A copper wire has diameter 0.5mm and resistivity 1.6x10^-8ohm m what will be the length of this wire to make its resistance 10ohm

A copper wire of length 1m and radius 1mm

Asked by admin @ 12/08/2021 in Science viewed by 303 persons

a copper wire of length 1m and radius 1mm joined in series with iron wire of length 2m and 3mm and a current is passed through wire. what is the …

Find the length of 13.2 kg of copper wire

Asked by admin @ 20/08/2021 in Math viewed by 266 persons

Find the length of 13.2kg of copper wire of diameter 4mm, if 1cu cm of copper wire weight 8.4g tell the and fast plz

A square wire frame of side l is floating

Asked by admin @ 17/08/2021 in Physics viewed by 325 persons

a square wire of side L is floating on the surface of liquid of surface tension T. the force required to pull out the frame from the liquid is

A copper wire has diameter 0.5 mm and resistivity

Asked by admin @ 17/08/2021 in Math viewed by 298 persons

A copper wire has diameter 0.5mm and resistivity 1.6x10^-8ohm m what will be the length of this wire to make its resistance 10ohm

What length of copper wire of specific resistance 1.7

Asked by admin @ 17/08/2021 in Physics viewed by 295 persons

What length of copper wire of specific resistance 1.7×10^-8 ohm/m and radius 1 mm is required so that its resistance is 1 ohm ?

Two wires one of copper and other of manganin

Asked by admin @ 13/08/2021 in Science viewed by 304 persons

two wires,one of copper and other of manganin, have equal lengths and equal resistances.Which wire is thicker ?Given that resistivity of copper is lower than that of manganin