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Questions and Answers
If a cylindrical conductor has resistance R, what will be the area of cross-section of another conductor of length '2l' and same resistance?
If a cylindrical conductor has resistance R, what will be the area of cross-section of another conductor of length '2l' and same resistance?
What is the maximum resistance that can be achieved using four 1/2 Ω resistors?
What is the maximum resistance that can be achieved using four 1/2 Ω resistors?
When two bulbs rated at 100 W and 40 W are connected in series with a current of 1 A, what current flows through the 40 W bulb?
When two bulbs rated at 100 W and 40 W are connected in series with a current of 1 A, what current flows through the 40 W bulb?
For a bulb rated at 200 V and 100 W, what is the resistance of the bulb?
For a bulb rated at 200 V and 100 W, what is the resistance of the bulb?
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If a 12 V battery produces a current of 2.5 mA through an unknown resistor, what is the resistance?
If a 12 V battery produces a current of 2.5 mA through an unknown resistor, what is the resistance?
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Study Notes
Expected Questions for Class 10
- Questions cover numerical problems related to electricity.
- Topics include resistance, current, voltage, and power.
- Problems involve calculations for circuits with various components.
Cylindrical Conductor Resistance
- A cylindrical conductor with length 'l' and uniform cross-sectional area 'A' has resistance 'R'.
- If another conductor of the same material and resistance but length '2l' is desired, the area of cross-section will be 2/3A.
Maximum Resistance
- Maximum resistance can be made using four resistors with 1/2Ω each.
- The maximum resistance achievable is 2Ω.
Bulbs in Series
- Two bulbs (100W and 40W) connected in series.
- The current through the 100W bulb is 1A.
- The current passing through the 40W bulb will be 0.8A.
Resistors in Combination
- Combining three 9Ω resistors to form a 6Ω equivalent resistance.
- Specific configuration needed.
Equivalent Resistance
- Calculate equivalent resistance between points M and N for a given combination of resistors.
Torch Bulb Power
- A torch bulb has a rating of 5V and 500mA.
- Calculate the power.
- Calculate the resistance.
Electric Bulb Resistance
- Calculate the resistance of an electric bulb that is rated at 200V and 100W.
Energy Consumption of Bulbs
- Calculates energy consumed for 3 bulbs glowing for 10 hours each day throughout the month of November.
Battery and Unknown Resistor
- A 12V battery is connected to an unknown resistor.
- The current is 2.5mA.
- Calculate the resistance of the unknown resistor.
Wire Resistivity Comparison
- Two wires, A and B, have equal lengths and resistances.
- Resistivity of A is greater than B.
- Determine which wire is thicker and why.
Electrical Circuit Current and Voltage
- Calculate the current in a given electrical circuit
- Calculate the voltage drop across a 30Ω resistor.
Network of Four Resistors
- Calculate the current drawn from a battery by a network of four resistors.
Wire Resistance Change
- A wire's length is doubled and this process is repeated.
- Determine how much the wire resistance changes.
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Description
This quiz focuses on numerical problems related to electricity for Class 10 students. Topics include resistance, current, voltage, and power, with various circuit calculations. Test your understanding of these fundamental concepts and application through diverse problems.
