Question

A dc ammeter and a hot wire ammeter are connected to a circuit in series. When a direct current is passed through circuit, the dc ammeter shows 6A. When ac current - - flows through circuit, the ac ammeter shows 8A. What will be reading of each ammeter if dc and ac current flows simultaneously through the circuit? (a) dc = 6A, ac = 10A (b) dc = 6A, ac = 5A (c) dc = 5A, ac = 8A (d) dc = 2A, ac = 3A​

Answer 1

Answer:

correct option is A

Explanation:

Given,

DC current=6A

AC current=8A

So,

When they are passing simultaneously

Reading of DC ammeter=6A,

Reading of AC Ammeter,

I

2

Rt=I

DC

2

Rt+I

AC

2

Rt [Heat produced]

I

2

Rt=6

2

.Rt+8

2

.Rt

I

2

=6

2

+8

2

=100

I=10 A.