Definition:
A mainframe architecture is a centralized computing model where a large, powerful computer performs all processing and users access it through dumb terminals.
Key Points:
Expensive and large systems
Time-sharing introduced
Dumb terminals had no processing power
Definition:
Client–server computing is a model where client machines perform some processing while servers handle...
9.1-Д 2-А 3-Б 4-В
1(a) Education as a Process: Education is a dynamic, lifelong journey where a person’s behavior is modified through experience. It is not just a destination (degree) but a continuous process of growth.
1(b) School as a Miniature Society: John Dewey called school this because it reflects the real world. Students learn social rules, cooperation, and diversity on a small scale before entering adult society.
1(c) Balanced Curriculum: A curriculum that gives equal importance to all aspects of...
8.56 Consider the data displayed in Exercise 1.20 on page 31. Construct a box-and-whisker plot and comment on the nature of the sample. Compute the sample mean and sample standard deviation. 8.57 If X1, X2,...,Xn are independent random variables having identical exponential distributions with parameter θ, show that the density function of the random variable Y = X1+X2+···+Xn is that of a gamma distribution with parameters α = n and β = θ. 8.58 In testing for carbon monoxide in a certain brand...
Lost Spring
Q1. Describe the miserable plight of the people of Firozabad.
Or
Describe the bangle makers of Firozabad. How does the vicious circle of the sahukars and the middlemen never allow them to come out of poverty?
Or
Write briefly on the hazards of working in the glass bangle industry.
Or
Describe the difficulties that the bangle makers of Firozabad face in their lives.
Or
The life bangle makers of Firozabad was full of obstacles which forced …
Ans:
Every other family in Firozabad is engaged
Semiconductor electronics -
Semiconductor - These materials whose electrical conductivity lies between conductor and insulator are called semiconductors.
At absolute zero they behave as insulators and at room temperature they behave as conductors.
Eg: Ge, Si, GaAs, CdS, CdSe, InP etc.
Classification of solid on the basis of energy band theory-
-In solids there are three energy bands.
-The lower band is completely filled by electrons called valence band (VB).
-The upper band is called conduction
AC (L-7)
The current which changes continuously with time and reverses its direction periodically is called AC The instances AC is given byI=I° sin wt .
DC - The current which is unidirectional (constant) is called DC.
RMS of AC over a comple cycle - it is defined as the square root of the mean of the square value of AC over a complete cycle. i.e Irms = I° / √2 =0.707 I°
IMPEDENCE- The joined Opposition offered by reactance and registance to flow alternating current is called impedence
Key Definitions:
Epidemiology: study of frequency, distribution, determinants of health/disease in populations + application to control.
Frequency: how often events occur (counts, proportions, rates).
Distribution: patterns by person/place/time.
Determinants: factors influencing occurrence (host/agent/environment).
Historical Figures (name + contribution):
Edward Jenner: cowpox → smallpox vaccine (1st vaccination).
James Lind: scurvy + citrus trial.
1-mark
1.Ohm’s Law:
At constant temperature, current is directly proportional to voltage; V = IR.
2.Kirchhoff’s Laws:
KCL: Algebraic sum of currents at a node is zero; KVL: Sum of voltages in a loop is zero.
3.Resistance, Inductance, Capacitance:
Resistance opposes current (ohm); inductance opposes current change (henry); capacitance stores charge (farad).
4.Active and Passive Elements:
Active: voltage, current sources; Passive: resistor, inductor, capacitor.
5.Current through 100 Ω resistor:
I