Consider the circuit given below where A, B and C are three identical light bulbs of constant resistance.
- List the bulbs in order of increasing brightness.
- If C burns out, what will be the brightness of A now compared with before?
- If B burns out instead, what will be the brightness of A and C compared with before?
Download our app for free and get started
- C will be the brightest. Voltage will be distributed equally between A and B, so they will have equal brightness but lesser than that of C.
- A gets the same voltage as before, so its brightness remains the same.
- If B burns put, A will also stop glowing because it is connected in series with B. However, brightness of C remains the same.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionDraw circuit symbols for:
- Fixed resistance.
- Variable resistance.
- A cell.
- A battery of three cells.
- An open switch.
- A closed switch.
- 2A resistance of $40$ ohms and one of $60$ ohms are arranged in series across $220$ volt supply. Find the heat in joules produced by this combination of resistances in half a minute.View Solution
- 3View SolutionHow much energy is consumed when a current of 5 amperes flows through the filament (or element) of a heater having resistance of 100 ohms for two hours? Express it in joules.
- 4View SolutionDerive the expression for the heat produced due to a current ‘I’ flowing for a time interval ‘t’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. With which name is this relation known?
- 5View SolutionHow does the resistance of a wire change when:
- Its length is tripled?
- Its diameter is tripled?
- Its material is changed to one whose resistivity is three times?
- 6View SolutionA resistor has a resistance of 176 ohms. How many of these resistors should be connected in parallel so that their combination draws a current of 5 amperes from a 220 volt supply line?
- 7The electrical resistivities of three materials P, Q and R are given below:$\begin{matrix}\text{P}&2.3\times10^{3}\Omega\text{ m}\\\text{Q}&2.63\times10^{-8}\Omega\text{ m}\\\text{R}&1.0\times10^{15}\Omega\text{ m}\end{matrix}$View Solution
Which material will you use for making:- Electric wires.
- Handle for soldering iron, and
- Solar cells?
- 8An electric iron is connected to the mains power supply of $220V$. When the electric iron is adjusted at ‘minimum heating’ it consumes a power of $360W$ but at ‘maximum heating’ it takes a power of $840W$. Calculate the current and resistance in each case.View Solution
- 9Calculate the work done in moving a charge of $4$ coulombs from a point at $220$ volts to another point at $230$ volts.View Solution
- 10View SolutionWhat is a circuit diagram? Draw the labelled diagram of an electric circuit comprising of a cell, a resistor, an ammeter, a voltmeter and a closed switch (or closed plug key). Which of the two has a large resistance: an ammeter or a voltmeter?