Chapter Questions
Define resistance and one ohm resistance.
How is equivalent resistance varies as resistances are connected in series and parallel?
What is a fuse and specify its uses?
What is Incandescence?
State laws of resistance and define resistivity.
What is electricity?
Find the total internal resistance of the cells when they are connected in(a) series and(b) parallel connections
The net charge flowing through a cross-section of conductor in unit time is called ____
What is the use of kilowatt-hour meter?
Define static and current electricity.
What is the value of mechanical equivalent of heat (J).
The unit of resistance is ____
Define conductance, conductivity and super conductors.
What are conductors and insulators? Give one example of each ____
Define terminal voltage, internal resistance and lost voltage.
Unit of electric charge is ____
What happens to the value of resistance when the length and the area of cross section are tripled?
What is the reason for conduction of electricity?
What is watt hour?
Electric potential is measured in ____
On increasing the temperature what is the variation of the resistance of a metallic conductor and semiconductor?
Define electric current.
Define electric energy or work.
Define electric potential, potential difference, and EMF
What is the relation between current (I), emf (E), terminal voltage (V) and internal resistance (r)?
Fuse should be connected to ____wire of the circuit.
Define electric power and give its units in S.I.
What is meant by conventional and electronic current?
State Ohm's law and what are ohmic and non-ohmic conductors.
What is electro plating?
Give reasons why the terminal voltage is less than the emf of a cell.
Why is it desirable to transmit high voltage and low current during the transmission of power?
How are the following systems connected?(a) ring system(b) tree system
Three resistors of $5 \Omega, 3 \Omega$ and $7 \Omega$ are connected in series across a battery of potential difference $3 \mathrm{~V}$. Find the current flowing through $3 \Omega$ and $7 \Omega$ resistor.
Explain the factors influencing the internal resistance of a cell.
Calculate the value of resistor $\mathrm{X}$.(GRAPH CANT COPY)
Explain how earthing is done.
Two heaters of $200 \mathrm{~W}$ each and two bulbs of $40 \mathrm{~W}$ each operate 4 hours daily on the supply of $200 \mathrm{~V}$. If the cost of energy is 3 rupees per $\mathrm{kW} \mathrm{h}$. Find the bill for the month of April.
Give an expression for equivalent internal resistance when cells of different internal resistances are connected in series and parallel.
Find the equivalent resistance across $A$ and $B$ in the following circuit.(GRAPH CANT COPY)
When does a fuse melt?
The length and area of cross section of a wire are $1 \mathrm{~m}$ and $0.040 \mathrm{~cm}^2$ respectively. If its resistance is 4 ohm, calculate its resistivity?
Derive $\mathrm{r}=\frac{\mathrm{E}-\mathrm{V}}{\mathrm{I}}$ where $\mathrm{r}$ is internal resistance, $\mathrm{E}-\mathrm{emf}, \mathrm{V}-$ terminal voltage, $\mathrm{I}-$ current.
What is the need for a step up and step down transformer at various stages of power transmission?
Derive $1 \mathrm{kWh}=36 \times 10^5 \mathrm{~J}$.
State Joule's law. Explain an experimental method to determine the value of J.
State Faraday's first law and second law of electrolysis and verify it experimentally.
Derive an expression for equivalent resistance of resistors connected in series.
Explain the working of the following(1) Filament lamp(2) Flourescent lamp(3) Discharge lamp(4) Electric arc lamp(5) Drycells
Derive an equivalent emf when cells are connected in series and parallel.