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
Razón y fe en la Edad Media Con la expansión del cristianismo en el Imperio romano, la fe cristiana entra en contacto con la cultura clásica y la filosofía griega. Surge así el problema de la relación entre razón y fe,
uno de los ejes fundamentales del pensamiento medieval. La visión cristiana las entiende como dos fuentes de conocimiento: la razón es la facultad que permite conocer la naturaleza (la filosofía se vale de ella); la fe consiste en la aceptación de la revelación divina,
5.2 COMPOUNDS DISPLAY CONSTANT COMPOSITION PROPORTIONS OF ELEMENTS
Another indicator that can be used to distinguish compounds from mixtures is THE PROPORTIONS OF ELEMENTS
THE LAW OF CONSTANT COMPOSITION: All samples of a given compound have the same proportions of their constituent elements. Water will always have 1 oxygen for every 2 hydrogen
5.3 CHEMICAL FORMULAS: HOW TO REPRESENT COMPOUNDS
CHEMICAL FORMULA: Indicates the elements present in a compound and the relative number of atoms of each. Indicates...
UNIT-5
1.3. Problems on Energy consumption. Ahouse has following load
(a) 5 Lamps of 60 W each working per 8 hours per day.
(b) 4 Lamps of 100 W each working per 8 hours per day.
(c) 2 Heaters of 1000 W each working per 3 hours per day.
(d) 5 Fans of 80 W each working per 12 hours per day.
Calculate the January month energy bill if the rate of Charge is Rs 0.50 per unit add Rs.10 as meter rent per month.
A.
Given data:
(a) Lamps:
*Number = 5
*Power = 60 W each
*Time = 8 h/day
(b) Lamps:
*Number
1.Derive the expression for Transient Response of RL Circuits.
A.
1. Circuit and assumptions
Resistance = R
Inductance = L
DC source = V applied at t=0
Initial current in inductor: i(0)=0
2. Apply Kirchhoff’s Voltage Law (KVL)
For t>0:
V=Ri(t)+L di(t)/dt
rearranging, L di(t)/dt+Ri(t)=V
3. Solve the differential equation
Step 1: Standard form: di(t)/dt+R/T i(T)=V/L
This is a first-order linear differential equation
Step 2: Complementary
8
3Moral concepts and vocab
Reading 1:
Descriptive Describe how the world is
No judgment
Example: “The car is green”
Normative: Say how the world should be
Make evaluations
Example: “The car is bad”
Moral/ethical claims are a type of normative claim.
All moral claims are normative, but not all normative claims are moral.
welfare, well-being, and prudential value: benefits your own well being
Actions: Impermissible → morally forbidden
Obligatory → must be done
Permissible...
1.What is CSR?Corporate Social Responsibility (CSR) means: Companies should not focus only on profit. They must also care about society, environment, and people.Simple Definition:CSR is the responsibility of businesses to contribute to sustainable economic development while improving the quality of life of employees, society, and the environment.Example:Tata builds schools and hospitals.Infosys supports education.ITC promotes sustainable farming. These are CSR activities.“CSR is a business approach