Question is ⇒ If A = 7 ∠15, A<sup>2</sup> is, Options are ⇒ (A) 49 ∠225°, (B) 49 ∠30°, (C) 49 ∠15°, (D) 49 ∠7.5°, (E) , Leave your comments or Download question paper.

Question is ⇒ If A = 7 ∠15, A<sup>2</sup> is, Options are ⇒ (A) 49 ∠225°, (B) 49 ∠30°, (C) 49 ∠15°, (D) 49 ∠7.5°, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	If A = 7 ∠15, A² is
A.	49 ∠225° [Wrong Answer]
B.	49 ∠30° [Correct Answer]
C.	49 ∠15° [Wrong Answer]
D.	49 ∠7.5° [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ A dc series motor is coupled to a load whose torque is proportional to speed. It is fed by a single phase ac supply through a full converter. When speed is 500 rpm, firing angle is 45°. It is desired to raise the speed. It will be necessary to
decrease the firing angle
increase the firing angle
either decrease or increase the firing angle depending on the required speed
decrease the load torque

⇒ How can the bandwidth of a control system be increased?
By the use of phase lead network
By the use of phase lag network
By the use of both phase-lag and phase-lead network
By the use of cascaded amplifiers in the system

⇒ Circular polarized waves result when
magnitudes are the same
phases are the same
magnitudes are same and phase difference is 90°
magnitudes are same and phase difference is zero

⇒ Which of the following diode is designed to operate in the breakdown region?
Signal diode
Power diode
Zener diode
None of the above

⇒ Some of MOS families are PMOS, NMOS, CMOS. The family dominating the LSI field where low power consumption is necessary is
NMOS
CMOS
PMOS
both NMOS and CMOS

⇒ Which of these commutation methods uses an auxiliary SCR?
Class A
Class B
Class C
Class D

⇒ Signal to noise ratio of microphone is defined as the ratio of output when the sound pressure is __________ to the output in the absence of any sound signal.
0.5 Pa
0.2 Pa
0.1 Pa
0.01 Pa

⇒ A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. If the oscillator is to be made variable using the same value of R, what should be the value of capacitor to obtain a frequency if 1 kHz?
636 pF
180 pF
65 pF
30 pF

⇒ A mode-10 counter can divide the clock frequency by a factor of
10
100
1000
10000

⇒ A Marconi antenna
is a grounded antenna with a length equal to λ/4
is an ungrounded antenna with a length equal to λ/4
has a length equal to 1
has a length equal to λ/2

⇒ Which of the following instruction modes does not exist in microprocessor 8085?
Inherent
Immediate
Absolute
Indirect

⇒ When .4546 E 5 and .5433 E 7 are to be added in normalized floating point mode
none of the numbers is changed to any other form
.4546 E 5 is changed .004546 E 7 and .5433 E 7 is not changed
.5433 E 7 is changed to 54.33 E 5 and .4546 E 5 is not changed
both the numbers are changed and their exponents are made equal to 6

⇒ Microprocessor 386SX is a 16/32 bit microprocessor. It has
16 bit registers and 32 bit data bus
16 bit registers and 16 bit data bus
32 bit registers and 32 bit data bus
32 bit register and 16 bit data bus

⇒ UJT can be used for
firing an SCR
turning off an SCR
both firing and turning off an SCR
none of the above

⇒ 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

⇒ In electronic voltmeters the measuring device is a
moving coil instrument
moving iron instrument
dynamometer instrument
none of the above

⇒ A computer window has a bar at its top to bear the name of window. This bar is called
title bar
status bar
menu bar
control bar

⇒ Top loading in an antenna increases
effective height
beam width
input capacitance
bandwidth

⇒ In the given circuit, the switch has been in position 1 for quite a long time. At t = 0 the switch is moved to position 2. At this position what is the time const
0.1 s
1 s
0.11 s
1.11 s

⇒

Match the following:

	List I		List II
A.	Word wrap	1.	interleaved execution of two or more programs by the same computer
B.	Client	2.	automatically moves a word to the next line if it does not fit in the current line
C.	Multitasking	3.	an application receiving data
D.	Landscape	4.	orientation of worksheet

A-1, B-2, C-3, D-4
A-2, B-3, C-4, D-1
A-4, B-3, C-2, D-1
A-2, B-3, C-1, D-4

⇒ An 8156 has A₁₅ connected to its CE input. A₁₄ to A₈ are unconnected, and AD₇ to AC₀ are connected ignoring shadows, what are the RAM locations?
(4000)_H - (40FF)_H
(8000)_H - (80FF)_H
(8000)_H - (40FF)_H
Any of the above

⇒ The current in an RL series circuit is 1 - e^-t amperes. Then di/dt is
1 - e^-t
- e^-t
e^t
e^-2t

⇒ Quantizing error occurs in
TDM
FDM
PCM
PWD

⇒ A single element strain gauge bridge has two fixed resistances R₁ and R₁ of 120 Ω each and a variable resistance which gives full deflection at 120 Ω for zero strain and 120.6 Ω for straine e. If gauge factor is 2, strain e is
0.0025
0.0035
0.005
0.0075

⇒ Which of the following microphones has bidirectional feature?
Moving coil
Ribbon
Condenser
Carbon

⇒

Assertion (A): ∈₀ has the dimensions of farad per meter.

Reason (R): D = ∈₀∈_r E.

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

⇒ For a npn BJT transistor f_β is 1.64 x 10⁸ Hz. C_μ = 10^-14 F; C_p = 4 x 10^-13 F and DC current gain is 90. Find f_T and g_m (f_β = cut off frequency, C_μ = capacitance, C_p = parasitic capacitance, g_m = transconductance, f_T = gain BW product)
f_T = 1.47 x 10¹⁰ Hz ; g_m = 38 milli mho
f_T = 1.64 x 10⁸ Hz ; g_m = 30 milli mho
f_T = 1.47 x 10⁹ Hz ; g_m = 38 mho
f_T = 1.33 x 10¹² Hz; g_m = 0.37 m-mho

⇒ Intrinsic concentration of charge carriers in a semiconductor varies as
T
T²
T³
T^-2

⇒ Consider the following

Maximum energy of electrons liberated photoelectrically is independent of light intensity
Maximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.

(1) is true and (2) is false
(1) and (2) both are true
(1) is false and (2) is true
(1) and (2) both are false

⇒ A microprocessor with a 16-bit address bus is used in a linear memory selection configuration (i.e., Address bus lines are directly used as chip selects of memory chips) with 4 memory chips. The maximum addressable memory space is
64 K
16 K
8 K
4 K