A.c -3

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

If x^2+ax+1 is a factor of ax^3+ bx + c , then which of the following conditions are not valid: a. a^2+c=0 b. b-a=ac c. c^3+c+b^2=0 d. 2c+a=b

In Delta ABC if (a+b+c) ( a-b+c)= 3ac, Then find angle B

The roots of the equation ax^(2)+bx+c=0 where a!=0 ,are: 1) (b+-sqrt(b^(2)-4ac))/(2a), 2) (-b+-sqrt(b^(2)-4ac))/(2c), 3) (-b+sqrt(b^(2)-4ac))/(2a), 4) (2a)/(2a-b+sqrt(b^(2)-4ac)

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

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

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

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