A.c -1

In an electric iron heat producedm is same, whether it is connected across an A.c. source or across 50 V constant voltage. R.M.S. value of the A.C. voltage applied is

The inverse of the matrix [(1,0,0),(a,1,0),(b,c,1)] is (A) [(1,0,0),(-a,1,0),(b,c,1)] (B) [(1,0,0),(-a,1,0),(ac,b,1)] (C) [(1,-a,ac-b),(-0,1,-c),(0,0,1)] (D) [(1,0,0),(-a,1,0),(ac-b,-c,1)]

The condition of the lines x=az+b,y=cz+d and x=a_1z+b_1,y=c_1z+d_1 to be perpendicular is (A) ac_1+a_1c+1=0 (B) aa_1+c c_1+1=0 (C) ac_1+b b\'+c c\'=0 (D) aa_1+c c_1-1=0

A 10 kW transformer has 20 turns in primary and 100 turns in secondary circuit. A.C. voltage E_(1) = 600 sin 314 t is applied to the primary. Find max. value of flux and max. value of secondary voltage.

Distinguish between d.c. and a.c.

A : Wires of the transmission lines carrying A.C. are made of multiple stands. R : A.C. flows on surface of the conductor.

The capacitive reactance in an A.C. circuit is

State one advantage of a.c. over d.c.

Give two similarities between an A.C. generator and a D.C. motor.

Name one d.c. source and one a.c. source.