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WorksheetsPhysics project 9A (Abdallah's group)
Total questions: 23
Worksheet time: 6hrs 45mins
wires of resistence a & b of equal mass and same material are taken the diameter of wira a is half of diameter b if the resistence of wire a is24 ohms find the resistence of wire b
32
16
1.5
4
Current in a circuit depends on
1.resistance
2.Potential difference
3.Both 1 and 2
4. E.m.f
Filament bulbs are best examples of the
Non-ohmic devices
Resistive devices
Ohmic devices
Electric devices
Current of 0.75 A, when a battery of 1.5 V is connected to wire of 5 m having cross sectional area 2.5 × 10-7 m², will have resistivity
1 × 10-7
1.1 × 10-7
2 × 10-7
2.1 × 10-7
The current passing through a resistor in a circuit is 0.01 A when the voltage across the same resistor is 5 V. What current passes through this resistor when the voltage across it is 7.5 V?
500 A
0.0125 A
7.5A
None of the above
What is ohm's law
Ohm's law states that the current through a conductor between one point is directly proportional to the voltage across the two points
Ohm's law states that the current through an conductor between one point is directly proportional to the voltage across the two points
Ohm's law states that the voltage through a conductor between one point is directly proportional to the potential difference across the two points
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points
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B
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