Advertisements
Advertisements
प्रश्न
An ammeter placed in series with an electric radiator reads 0.5 amps and a voltmeter placed across it reads 230 volts. What is the resistance of the radiator?
Advertisements
उत्तर
Using Ohm's law, R = `"V"/"I"`
`= 230/0.5`
R = 460 Ω
APPEARS IN
संबंधित प्रश्न
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?
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
State Ohm’s law and draw a neat labelled circuit diagram containing a battery, a key, a voltmeter, an ammeter, a rheostat and an unknown resistance to verify it.
In a conductor 6.25 × `10^16` electrons flow from its end A to B in 2 s. Find the current flowing through the conductor (e = 1.6 × `10^-19` C)
How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
Obtain the macroscopic form of Ohm’s law from its microscopic form and discuss its limitation.
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 ______.
What is the resistance of a conductor through which a current of 0.5 A flows when a potential difference of 2V is applied across its ends?
