Advertisements
Advertisements
प्रश्न
Consider the sacle of voltmeter shown in the diagram and answer the following questions :
(a) What is the least count of the voltmeter?
(b) What is the reading shown by the voltmeter ?
(c) If the voltmeter is connected across a resistor of 20 `Omega` how much current is flowing through the resistor?
Advertisements
उत्तर
(a) Least count = `3/20 = 0.15V`
(b) `(1.5 + 0.15 + 0.15)V = 1.8 V`
(c) R = 20 `Omega`
`V = 1.8 V`
`therefore I = ?`
By ohm’s law
`V = IR`
`1.8/20 = I therefore I = 0.09 A`
APPEARS IN
संबंधित प्रश्न
Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?
Name the law which is illustrated by the above V−I graph.
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)
Two metallic spheres A and B kept on insulating stands are in contact with each other. A positively charged rod P is brought near the sphere A as shown in the figure. The two spheres are separated from each other, and the rod P is removed. What will be the nature of charges on spheres A and B?
Explain the equivalent resistance of a parallel resistor network.
Which of the following is correct for V-I graph of a good conductor?
A student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1, R2 and R3 respectively. Which of the following is hue?
State Ohm’s law? How can it be verified experimentally? Does it hold good under all conditions? Comment.
State Ohm's Law. Represent it mathematically.
