# The block diagrams of two types of half wave rectifiers are shown in the figure.The transfer characteristics of the rectifiers are also shown within the block It is desired to make full wave rectifer using above two half-wave rectifiers.The resultant circuit will be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# A 3 line to 8 line decoder with active low outputs is used to implement a 3-variable Boolean function as shown in the figure The simplified form of Boolean function F (A,B,C) implemented in 'Product of Sum' form will be

1.  (X+Z).(++).(Y+Z)

2.  (+).(X+Y+Z).(+)

3.  (++Z).(+Y+Z).(X++Z).(X+Y+)

4.  (++).(+Y+).(X+Y+Z).(X++)

4

(+).(X+Y+Z).(+)

Explanation :
No Explanation available for this question

# The truth table of a mottoshot shown in the figure it given in the table below  Two monoshots, one positive edge triggered and other negative edge triggered are connected aa shown in the figure.The pulse widths of the two monoshot outputs Q1 and Q2 are TON1 and T0N2 respectively. The frequency and the duty cycle of the signal at will respectively be

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Roots of the algebraic equation x3+x2+x+1=0 are

1.  (+1, +j,-j)

2.  (+1,-1, +1)

3.  (0, 0, 0)

4.  (-1, +j,-j)

4

(-1, +j,-j)

Explanation :
No Explanation available for this question

# With K as a constant,the possible solution for the first order differential equation dy/dx=e-3x is

1.  -(1/3)e-3x + K

2.  -(1/3)e3x + K

3.  -(1/3)e-3x + K

4.  -3e-x + K

4

-(1/3)e-3x + K

Explanation :
No Explanation available for this question

# The r.m.s value of the current i(t) in the circuit shown below is

1.  ½ A

2.  (1/√2)A

3.  1A

4.  √2 A

4

(1/√2)A

Explanation :
No Explanation available for this question

# The fourier series expansion of the periodic signal shown below will contain the following nonzero terms

1.  a0 and bn, n = 1,3,5,...∞

2.  a0 and an, n = 1,2,3,...∞

3.  a0 an and bn, n = 1,2,3,...∞

4.  a0 and an n = 1,3,5,...

4

a0 and an n = 1,3,5,...

Explanation :
No Explanation available for this question

# A 4 - point starter is used to start and control the speed of a

1.  dc shunt motor with armature resistance control

2.  dc shunt motor with field weakening control

3.  dc series motor

4.  dc compound motor

4

dc shunt motor with armature resistance control

Explanation :
No Explanation available for this question

# A three-phase,salient pole synchronous motor is connected to an infinite bus.Ig is operated at no load a normal excitation.The field excitation of the motor is first reduced to zero and then increased in reverse direction gradually.Then the armature current

1.  Increases continuously

2.  First increases and then decreases steeply

3.  First decreases and then increases steeply

4.  Remains constant

4

First increases and then decreases steeply

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4