# Which of the following statement is true for a delayed step function u(t-T)

1.  It has a finite fourier series

2.  It has infinite fourier series

3.  It does not have fourier series

4.  None of these

4

It does not have fourier series

Explanation :
No Explanation available for this question

# Under high electrical fields in a semiconductor ,if electrical field increases ,then

1.  Mobility decreases

2.  Mobility decreases

3.  Velocity saturates

4.  velocity decreases

4

Velocity saturates

Explanation :
No Explanation available for this question

# In a series R-L-C circuit excited by a voltage e=E sin (ωt),where LC < 1/ω2 which of the following is true

1.  Current lags the applied voltage

2.  Current leads the applied voltage

3.  Current is in phase with applied voltage

4.  None of these

4

Explanation :
No Explanation available for this question

# Order of electrical conductivity of pure Si ,gaAs, cu and NAcl at room temperature is

1.  Cu>GaAs>Si>Nacl

2.  Nacl>Si>GaAs>Cu

3.  Cu>Nacl>GaAs>Si

4.  Cu>Si>GAsl>Nacl

4

Cu>Nacl>GaAs>Si

Explanation :
No Explanation available for this question

# If a pulse voltage v(t) of 4V magnitude and 2 sec’s duration is applied to a pure inductor of 1H, with zero initial current, the current(in amps) drawn at t=3 second will be

1.  0

2.  4

3.  2

4.  8

4

0

Explanation :
No Explanation available for this question

# The current waveform in a pure resistor of 10is shown in the given figure. Power dissipated in the resistor is

1.  7.29W

2.  52.4W

3.  135W

4.  270W

4

270W

Explanation :
No Explanation available for this question

# With increasing temperature the electrical conductivity of metal

1.  Increase

2.  Decrease

3.  Increase then decrease

4.  Unaffected

4

Decrease

Explanation :
No Explanation available for this question

# A unit impulse δ(t) is mathematically defined as Of these correct statements are

1.  1, 2, 3

2.  1, 2

3.  2, 3

4.  1, 3

4

1, 3

Explanation :
No Explanation available for this question

# Intrinsic Silicon is doped with Arsenic, when connected to a circuit, the conduction process in the doped Si due to

1.  Electrons provided by Si

2.  Holes provided by As

3.  Holes provided by Si

4.  Electrons provided by Si & As

4

Electrons provided by Si & As

Explanation :
No Explanation available for this question

1.  200V

2.  1788V

3.  1800V

4.  2000V

4