Advertisements
Advertisements
प्रश्न
An electric bulb draws 1.2 A current at 6.0 V. Find the resistance of filament of bulb while glowing.
उत्तर
Current (I) = 1.2 A
Potential Difference/Voltage (V) = 6.0 V
Resistance (R) = ?
According to Ohm's Law:
V = IR
Then R = `"V"/"I"`
R = `6/1.2`
R = 5 Ω
APPEARS IN
संबंधित प्रश्न
Find the resistance of a conductor if 0.24 A current is passing through it and a potential difference of 24 V is applied across it.
Find the expression for the resistivity of a material and state the SI unit of resistivity.
Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance?
Which of the following is an ohmic resistance?
A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. Assuming that it has a uniform cross section, what will be its new resistance?
- Name and state the law which relates the potential difference and current in a conductor.
- What is the necessary condition for a conductor to obey the law named above in part (a) ?
Answer the following question.
Distinguish between Ohmic and non-ohmic substances; explain with the help of example.
You are provided with a resistor, a key, an ammeter, a voltmeter, four cells of 1.5 V each and few connecting wires. Using circuit components, draw a labelled circuit diagram to show the setup to study Ohm's law.
State the relationship between potential difference (V) across the resistor and the current (I) flowing through it. Also draw V-I graph, taking V on the X-axis.
How is electric current related to the potential difference across the terminals of a conductor?
Draw a labelled circuit diagram to verify this relationship.
