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10th Manipur Board
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Suppose the potential difference across an electrical component to fix resistance decreases to half of its former value. What change will occur to the current passing through it?

Important Questions on Electricity

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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>Try to Answer>Q 1
Why does the connecting wires, i.e. the cord of an electric iron or an electric heater not glow while the heating element glows?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 1
3×1017 electrons cross an area in 30 seconds. What is the electric current?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 2
The potential at a point is 20 V. Calculate the amount of work done to bring a charge of 0.5 C from infinity to this point?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 3
A potential difference of 20 V appears across the ends of a resistor when 2.5 A of current is passed through it. What is the resistance of the resistor?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 4
How much charge flows through a wire carrying 2.5 A of current in 20 minutes?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 5
A nichrome wire has diameter 1.0 mm and resistivity 1.0×10-4 Ω m. Calculate the required length of this wire to make a resistance of 14 Ω?
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10th Manipur Board
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Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 6
A copper wire of certain length has a resistance of 10 Ω. What will be its resistance after stretching to double its length?
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10th Manipur Board
IMPORTANT
Science for Class 10>Chapter 8 - Electricity>EXERCISES>Q 7

Two resistors of resistances 10 Ω and 20 Ω are connected in parallel. A battery supplies current of 6 A to the combination as shown in the figure. Calculate the current in each resistor.

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