For measuring strain, Dummy strain gauges are used in adjacent arm of the wheatstone bridge For increasing the sensitivity of bridge in which they are included. For compensation of temperature changes. For compensating differential expansion. For calibration of strain gauge.

Answer:

The right answer is:

A) to detect and test small electric charges.

Answer:

To detect and test small electric charges.

Explanation:

Electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container.

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Answer:

[tex] \frac{ - 1}{x ^{2} }.[/tex]

Step-by-step explanation:

The derivative of a function is represented by or f '(x). It means that the function is the derivative of y with respect to the variable x.

Let us consider f(x) = 1/x =x-1

Then, f'(x) = n xn - 1 , where n = -1.

Replacing n with -1, we get

f'(1/x) = -1 x–²

f'(1/x) = -1/ x²

So, the derivative of 1/x is -1/x².

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Contra Entry : when cash is deposited into the bank or when cash is withdrawn from the bank for use in the office, each such transaction affects both 'Cash Column' as well as 'Bank Column' and the transaction is therefore recorded on both sides of the cash book.

Answer:

A contra entry is recorded when the debit and credit affect the same parent account and resulting in a net zero effect to the account.

When cash is paid into the bank, the amount deposited is written on the left side in the bank column and at the same time, the same amount is entered on the right side in the cash column. The reverse entries are recorded when cash is withdrawn from the bank for use in the office.

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Answer:

Both A and B.

Explanation:

Depreciation of fixed capital assets refers to normal wear and tear and foreseen obsolescence.

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