Q1. | In following circuit, steady state is reached with S open, S is closed at t = 0, the current I at t = 0^{+} is give |

A. | 9 Ω [Wrong Answer] |

B. | 6 Ω [Wrong Answer] |

C. | 7 Ω [Correct Answer] |

D. | 10 Ω [Wrong Answer] |

View Answer
Explanation:-
Answer : CDiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ When ac current is zero, no electrons are in motion.

TRUE

FALSE

⇒ What are the values of E

_{max}and E

_{min}displayed on the oscilloscope, when a 1 kV

*P*-

*P*carries is modulated to 50%?

2 kV, 0.5 kV

1 kV, 0.5 kV

0.75 kV, 0.25 kV

0.5 kV, 1.5 kV

⇒

**Assertion (A):** A fully controlled bridge converter can operate in first and fourth quadrant.

**Reason (R):** A semi converter is cheaper than a full converter.

Both A and R are correct and R is correct explanation of A

Both A and R correct but R is not correct explanation of A

A is correct but R is wrong

A is wrong but R is correct

⇒ Each cell of a static RAM has

4 MOS transistors

4 MOS transistors and 2 capacitors

2 MOS transistors and two capacitors

1 MOS transistor and 1 capacitor

⇒ Read the following statements about sets

- If A and B are sets then A + B denotes union of sets A and B.
- The union of A and B is that set whose elements are in either A or B or both.
- If A and B are sets, then difference of sets A and B is denoted by A - B.
- A - B in the set obtained by removing elements of A from B.

All

1, 2 and 3 only

2 and 3 only

1 and 4 only

⇒ An RLC series circuit is excited by an ac voltage

*v*= 1 sin

*t*. If L = 10 H, C = 0.1 F peak value of voltage across R is

0.707 V

1 V

1.44 V

indeterminate as value of R is not given

⇒ The most widely used diode rectifier circuit is

half wave

full wave with centre tapped transformer

bridge

either (a) or (b)

⇒ Consider the following instruments

- Tangent galvanometer
- Rayleigh current balance
- Household energy meter
- Hot wire ammeter

1, 2 and 3

1, 2 and 4

1 and 2

2, 3 and 4

⇒ Hydrogen is used in

large size transformers

MCB

large size generators

circuit breakers

⇒

**Assertion (A):** When V_{DS} is more than rated value the drain current in a JFET is very high.

**Reason (R):** When V_{DS} is more than rated value, avalanche breakdown occurs.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not a correct explanation of A

A is true but R is false

A is false but R is true

⇒ In following figure find V

_{DSQ}by assuming gate current is negligible for the

*p*-channel JFET. (if I

_{DQ}= - 6 mA, R

_{S}= 0, V

_{DD}= -18 V, R

_{D}= 2 kΩ, I

_{DSS}= - 10 mA, I

_{PO}= - 3 V)

4 V

- 6 V

- 10 V

6 V

⇒ The function Y = A B C + AB C + A B C + A BC is to be realized using discrete gates. The inputs available are A, B, C. We need a total of

8 gates

6 gates

10 gates

5 gates

⇒ The number of variables in a function is odd and the number of minterms with even number of 0's are same as the number of minterms with odd number at 1's, the expression formed can be represented in __________ as well as __________ form.

Ex - OR, NOR

Equivalence, Ex - OR

AND, Coincidence

OR, Ex - OR

⇒ A two terminal black box contains one of the elements R, L, C. The black box is connected to 220 V as supply. The current is I, when a capacitance of 0.1 F is connected in series between the source and box, the current is 2I. The elements is

resistance

inductance

capacitance of 0.5 F

not identifiable form the given data

⇒ In the self biasing scheme (R

_{F}across collector to base) of BJT, S

_{1}tends to unity by __________ R

_{C}is the collector load Resistance.

increasing R

_{F}

decreasing R

_{F}

decreasing R

_{F}and increasing R

_{C}

increasing R

_{F}and decreasing R

_{C}

⇒ According to maximum power transfer theorem, the maximum power is absorbed by one network from another network when

the impedance of one of the networks is half that of the other

the impedance of one is the complex conjugate of the other

the impedance of one is equal to that of the other

none of the above

⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?

20 days

18 days

16 days

15 days

⇒ The output impedance of an ideal op-amp is

zero

low

high

infinite

⇒ In 8085 the instruction

`MOV A, B`

is an example ofDirect addressing

Immediate addressing

Register addressing

Register indirect addressing

⇒ For the wave shown in figure, the average valu

7.07 A

0.208333333333333

2.5 A

0.5 A

⇒

**Assertion (A):** A non-sinusoidal wave can be expressed in terms of sine waves of different frequencies which are multiples of the frequency of fundamental.

**Reason (R):** If negative half of a complex wave is a reproduction of the positive half, the even harmonics are absent.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is true, R is false

A is false, R is true

⇒ A hertzian dipole has a radiation pattern with

a null in the direction of the dipole

a null in the plane perpendicular to the dipole

a peak in the direction of the dipole

none of the above

⇒ Which of the following cannot be used to demodulate SSB?

Complete phase shift generator

Product detector

Diode balanced modulator

Bipolar transistor balanced modulator

⇒ The given figure shows three Nyquist plots of G(

*s*) H(

*s*) =

*e*/[

^{-sT}*s*(

*s*+ 1)] for different values of T. The curves 1, 2, 3 ca

for T = 0, 0.5 and 1 respectively

for T = 1, 0.5 and 0 respectively

for T = 0.5, 1 and 0 respectively

for T = 0, 1 and 0.5 respectively

⇒ Which of the following is not a valid integer constant in C (for 16 bit)?

321

-162

-65321

1

⇒ In a oscillator, a sine wave generator starts at

*t*= 0. It consist of

Pure sine wave

Pure cosine wave

Unity for

*t*> 0

2∪(

*t*) - 1

⇒ A square in which each (

*i*,

*j*)

^{th}element of matrix is equal to the negative of the conjugate complex of (

*j*,

*i*)

^{th}element, is called

Hermitian matrix

Skew symmetric matrix

Conjugate anti-symmetric matrix

Skew-Hermitian matrix

⇒ A device has two resistances 300 Ω and 200 Ω respectively. The noise voltages due to these two resistance calculated separately are 5.38 μV and 4.38 μV respectively. When both of them are used together, the noise voltage will be

9.76 V

1 μV

23.56 μV

6.94 μV

⇒ Harmonic distortion analyser

measures amplitude of each harmonic

measures rms value of fundamental frequency component

measures rms value of all harmonics except fundamental frequency

displays rms value of each harmonic on screen of CRO

⇒

**Assertion (A):** Temperature control of the passenger compartment of car uses both feed forward and feedback controls.

**Reason (R):** Feed forward control gives corrective action before the disturbance affects the output and feedback control applies corrective action after output changes.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct but R is wrong

R is correct but A is wrong