Question

the bridge wire may not be exactly 100 cm long, so record its exact length and use this in the calculation​

Answer 1

Answer:

10

Explanation:

the bridge exactly=100cm long

length=distance/TIME

Answer 2

Answer:

The balance be obtained if the two resistances are in the ratio 2 : 3 is 40 cm.

Explanation:

• A bridge wire is known as a hot bridge wire because it is relatively resistance that is thin.
• It is used for setting off any pyrotechnic composition to initiator of pyrotechnic.
• When an electric current is heated to the temperature which is high, it will start to turn into exothermic chemical reaction due to the attached composition.
• The bridge wire is made up of mananin alloy, copper-nickel alloy, nickel alloy, iron and chromium.
• The reason is due to the power of resistance occurring due to corrosion and they have a low temperature.
• The high melting point is about 1400 degree Celsius.
• The bridge wires that are found to be dipped in suitable pyrotechnic composition is called as electric matches.

• Uses of bridge wire:

They are used in triggering detonators, electric matches, electric blasting caps.

Given that:

The meter bridge the length of the wire is 100cm.

To find:

What is its exact length and use this in the calculation =?

Solution:

Let us consider,

point at which will the balance be obtained if the two resistances will be in the  ratio 2 : 3.

Let us take, the ratio

Here, p =2 , Q= 3

We get,

P/Q = 2/3

P/Q = X/ 100-K

2/3 = X/100-K

200 = 5x

x = 40 cm

Therefore, when the balance be obtained if the two resistances are in the ratio 2 : 3 is 40 cm.

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