A meter has a full-scale angle of 90° at a current of 1

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A meter has a full-scale angle of 90° at a current of 1 A. This meter has perfect square-law response. What is the current when the deflection is 45°?

1. 0·5 A
2. 0·25 A
3. 0·707 A
4. 0·67 A

Correct Option: C

Required current
I′ = I sin 45°

= 1 ×	1
	√2

= ·707