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 will be the change in the current if the potential difference is kept constant and the resistance of the circuit is made four times?
- It will remain unchanged.
- It will become four times.
- It will become one-fourth.
- It will become half.
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance?
A 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.
Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.
Write a short note on superconductors?
Explain the equivalent resistance of a series resistor network.
Explain the equivalent resistance of a parallel resistor network.
The slope of voltage (V) versus current (I) is called:
A metal rod of length 10 cm and a rectangular cross-section of 1 cm × `1/2` cm is connected to a battery across opposite faces. The resistance will be ______.
