Question

An ammeter is used to measure the current in a wire. If an ammeter indicates a current in a wire, what can be said about the charges in the wire?​

Answer 1

Solution

Correct option is

D

5A

Quantity of the heat liberated in the ammeter o resistance R

(i) Due to direct current of 3A=

J

3

2

R

(ii) Due to alternate current of 4A=

J

4

2

R

Total heat produced per second

=3A=

J

3

2

R

+4A=

J

4

2

R

=

J

25R

Let the equivalent alternating current be I virtual ampere.

∴

J

I

2

R

=

J

25R

or I=5A

Answer 2

Answer:

mathematics, an algebraic equation or polynomial equation is an equation of the form P=0 where P is a polynomial with coefficients in some field, often the field of the rational numbers. Wikipedia

Explanation:

Ur intro