Advertisements
Advertisements
प्रश्न
A car bulb connected to a 12 volt battery draws 2 A current when glowing. What is the resistance of the filament of the bulb? Will the resistance be more same or less when the bulb is not glowing?
Advertisements
उत्तर
Potential Difference/Voltage (V) = 12 V
Current (I) = 2 A
Resistance (R) = ?
According to Ohm's Law:
V = IR
Then R = `"V"/"I"`
R = `12 / 2`
R = 6 Ω
Resistance will be less when the bulb is not glowing.
APPEARS IN
संबंधित प्रश्न
What is Resistivity?
Name the unit of electrical resistance and give its symbol.
The graph between V and I for a conductor is a straight line passing through the origin.
- Which law is illustrated by such a graph?
- What should remain constant in a statement of this law?
The graph between V and I for a conductor is a straight line passing through the origin.
What should remain constant in a statement of this law?
The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.
What would you expect the voltmeter A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?
Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 V.
What is meant by the drift speed of free electrons?
SI unit of resistance is:
The resistance of a nichrome wire at 0°C is 10Ω. If its temperature coefficient of resistivity of nichrome is 0.004/ °C, find its resistance of the wire at boiling point of water. Comment on the result.
The slope of voltage (V) versus current (I) is called:
