Electricity (10)
Electric current; Electric potential; Ohm's Law; Resistance of conductor; Resistors in series and parallel; Heating effect of electric current; Electric power
Two V - I graphs A and B for series and parallel combinations
Two V - I graphs A and B for series and parallel combinations of two resistors are as shown. Giving reason state which graph shows (a) series,
...How is electric current related to the potential difference
How is electric current related to the potential difference across the terminals of a conductor? Draw a labelled circuit diagram to verify this
...The resistance of a resistor is reduced to half of its initial value
The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount
...Two LED bulbs of 12W and 6W are connected in series
Two LED bulbs of 12W and 6W are connected in series. If the current through 12W bulb is 0.06A the current through 6W bulb will be :
...A 5 $\Omega$ resistor is connected across a battery of 6 volts
A 5Ω resistor is connected across a battery of 6 volts. Calculate the energy that dissipates as heat in 10 s.
State Joule's law of heating. Express it mathematically when an appliance of resistance R is connected
State Joule's law of heating. Express it mathematically when an appliance of resistance R is connected to a source of voltage V and the current I
...Two bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to an electric
Two bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to an electric mains of 220 V. Find the current drawn by the bulbs from
...Three resistors R1, R2 and R3 are connected in parallel and the combination is connected to a battery, an ammeter
Three resistors R1, R2 and R3 are connected in parallel and the combination is connected to a battery, an
...List the factors on which the resistance of a conductor in the shape of a wire depends
List the factors on which the resistance of a conductor in the shape of a wire depends.
Write Joule’s law of heating
- Write Joule’s law of heating.
- Two lamps, one rated 100 W; 220 V, and the other 60 W; 220
Show how would you join three resistors, each of resistance 9 Ω
Show how would you join three resistors, each of resistance 9 Ω so that the equivalent resistance of the combination is (i) 13.5 Ω (ii) 6 Ω
The current flowing through a resistor connected in a circuit and the potential difference
The current flowing through a resistor connected in a circuit and the potential difference developed across its ends are as shown in the diagram
...Calculate the equivalent resistance of the following network
Calculate the equivalent resistance of the following network
...
Three resistors R1, R2 and R3 are connected in parallel and the combination is connected to a battery
Three resistors R1, R2 and R3 are connected in parallel and the combination is connected to a battery, ammeter, voltmeter and
key. Draw
Consider the given circuit and find the current flowing in the circuit and potential difference
Consider the given circuit and find the current flowing in the circuit and potential difference across the 15 Ω resistor when the circuit is
...How will you infer with the help of an experiment that the same current flows
How will you infer with the help of an experiment that the same current flows through every part of a circuit containing three
resistors in