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People often call ______ as the brain of computer system
CPU
CPU
See lessA set of flip flops integrated together is called ____
A set of flip flops integrated together is called a register.
A set of flip flops integrated together is called a register.
See lessIf in a computer, 16 bits are used to specify address in a RAM, the number of addresses will be
The number of addresses that can be specified with 16 bits is 2^16, which equals 65,536.
The number of addresses that can be specified with 16 bits is 2^16, which equals 65,536.
See lessWhat is the responsibility of the logical unit in the CPU of a computer?
The responsibility of the logical unit in the CPU of a computer is to perform all logical operations and comparisons. This includes executing operations such as AND, OR, NOT, and XOR, as well as comparing numbers to determine equality or order. The logical unit works in conjunction with the arithmetRead more
The responsibility of the logical unit in the CPU of a computer is to perform all logical operations and comparisons. This includes executing operations such as AND, OR, NOT, and XOR, as well as comparing numbers to determine equality or order. The logical unit works in conjunction with the arithmetic unit to process data and make decisions based on logical conditions, enabling the CPU to execute complex instructions and algorithms.
See lessBefore a disk drive can access any sector record, a computer program has to provide the recordâ€TMs disk address. What information does this address specify?
The disk address specifies the location of the data on the disk in terms of cylinder, head, and sector. This information allows the disk drive to locate where the specific record is stored on the physical medium of the disk.
The disk address specifies the location of the data on the disk in terms of cylinder, head, and sector. This information allows the disk drive to locate where the specific record is stored on the physical medium of the disk.
See lessTodayâ€TMs computer giant IBM was earlier known by different name which was changes in 1924. What was that name?
IBM was originally known as the Computing-Tabulating-Recording Company (CTR) before it changed its name in 1924.
IBM was originally known as the Computing-Tabulating-Recording Company (CTR) before it changed its name in 1924.
See lessA chopper circuit is fed from an input voltage of 20 V delivers a power of 16 watts. If the chopper efficiency is 80 %, then find the value of input current.
To find the input current in the chopper circuit, we can use the formula for power, which is:[ text{Power} = text{Voltage} times text{Current} ]The output power ((P_{out})) is given as 16 watts, and the efficiency ((eta)) of the chopper is 80% (or 0.8). The input power ((P_{in})) can be calculated uRead more
To find the input current in the chopper circuit, we can use the formula for power, which is:
[ text{Power} = text{Voltage} times text{Current} ]
The output power ((P_{out})) is given as 16 watts, and the efficiency ((eta)) of the chopper is 80% (or 0.8). The input power ((P_{in})) can be calculated using the efficiency:
[
eta = frac{P_{out}}{P_{in}}
]
So, rearranging this gives us:
[
P_{in} = frac{P_{out}}{eta} = frac{16 text{ watts}}{0.8} = 20 text{ watts}
]
Now, we know that the input power is also equal to the product of the input voltage and the input current:
[
P_{in} = V_{in} times I_{in}
]
Plugging in the values:
[
20 text{ watts} = 20 text{ V} times I_{in}
]
Now, solving for (I_{in}):
[
I_{in} = frac{20 text{ watts}}{20 text{ V}} = 1 text{ A}
]
Thus, the value of the input current is 1 A.
See lessThe speed of a separately excited dc motor is controlled below base speed by using a type-A SCR based chopper. The supply voltage is 220 V dc and the armature resistance is 0.5 Ω. Calculate the minimum value of firing angle if the motor drives a constant torque load requiring an average armature current of 30 A.
To determine the minimum value of the firing angle ((alpha)) for a separately excited DC motor controlled by a type-A SCR-based chopper, we can use the following relationships. 1. Voltage across the armature ((V_a)):- The average output voltage of the chopper can be approximated by:[V_a = V_s - I_aRead more
To determine the minimum value of the firing angle ((alpha)) for a separately excited DC motor controlled by a type-A SCR-based chopper, we can use the following relationships.
1. Voltage across the armature ((V_a)):
– The average output voltage of the chopper can be approximated by:
[
V_a = V_s – I_a cdot R_a
]
where:
– (V_s = 220 , V) (supply voltage)
– ( I_a = 30 , A) (average armature current)
– ( R_a = 0.5 , Omega) (armature resistance)
So first we calculate (I_a cdot R_a):
[
I_a cdot R_a = 30 , A cdot 0.5 , Omega = 15 , V
]
Now, substituting this value in:
[
V_a = 220 , V – 15 , V = 205 , V
]
2. Calculating the firing angle ((alpha)):
– For a type A chopper, the average output voltage can also be expressed as:
[
V_a = frac{V_s}{pi} (1 + cos alpha)
See lessA voltage commutated chopper has the following parameters: Vs = 220 V. Commutation circuit: L = 20 μH and C = 50 μF. Find the turn-off time for the main SCR with a constant load current of 80 A and Ton = 800 μsecs.
To find the turn-off time for the main SCR in a voltage commutated chopper, we can use the formula for turn-off time ((t_{off})):[t_{off} = frac{L cdot I}{V_{C}} + frac{C cdot V_{C}}{I}]Where:- (L) is the inductance in henries (H), so convert (20 mu H = 20 times 10^{-6} H)- (C) is the capacitance inRead more
To find the turn-off time for the main SCR in a voltage commutated chopper, we can use the formula for turn-off time ((t_{off})):
[
t_{off} = frac{L cdot I}{V_{C}} + frac{C cdot V_{C}}{I}
]
Where:
– (L) is the inductance in henries (H), so convert (20 mu H = 20 times 10^{-6} H)
– (C) is the capacitance in farads (F), so (C = 50 mu F = 50 times 10^{-6} F)
– (I) is the current in amperes (A), here it’s (80 A)
– (V_{C}) is the voltage across the capacitor; assuming ideal conditions, this would equal the supply voltage (V_s) in this situation.
Let’s substitute the numerical values:
1. Calculate (V_{C}):
– Let’s assume (V_C = V_s = 220 V).
2. Using the formula:
– (t_{off} = frac{20 times 10^{-6} cdot 80}{220} + frac{50 times 10^{-6} cdot 220}{80})
Now calculating each term:
– First term:
See lessA voltage commutated chopper has the following parameters: Vs = 220 V. Commutation circuit: L = 20 μH and C = 50 μF. Find the effective on period for a constant load current of 80 A and Ton = 800 μsecs
To find the effective on period (Te) for a voltage commutated chopper, we start by using the energy balance principle and the given parameters.Given:- Supply Voltage (Vs) = 220 V- Commutation Inductance (L) = 20 μH = 20 × 10^-6 H- Commutation Capacitance (C) = 50 μF = 50 × 10^-6 F- Load Current (I)Read more
To find the effective on period (Te) for a voltage commutated chopper, we start by using the energy balance principle and the given parameters.
Given:
– Supply Voltage (Vs) = 220 V
– Commutation Inductance (L) = 20 μH = 20 × 10^-6 H
– Commutation Capacitance (C) = 50 μF = 50 × 10^-6 F
– Load Current (I) = 80 A
– On period (Ton) = 800 μs = 800 × 10^-6 s
The effective on period can generally be calculated using the formula:
[
Te = frac{L cdot I}{Vs} + Ton
]
Substituting in the known values:
1. Calculate ( frac{L cdot I}{Vs} ):
[
frac{L cdot I}{Vs} = frac{(20 times 10^{-6} , H) cdot (80 , A)}{220 , V}
]
[
= frac{1.6 times 10^{-3}}{220} = 7.27 times 10^{-6} , s
]
2. Now, add this to the Ton:
[
Te = (7.27 times 10^{-6} , s) + (800 times
See less