Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Ohm's law states that the graph between V and I for a conductor is a straight line passing through the origin.
APPEARS IN
संबंधित प्रश्न
Ohm's law gives a relationship between:
(a) current and resistance
(b) resistance and potential difference
(c) potential difference and electric charge
(d) current and potential difference
The unit of electrical resistance is:
(a) ampere
(b) volt
(c) coulomb
(d) ohm
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?
Fill in the following blank with suitable words:
Resistance is measured in .............. The resistance of a wire increases as the length ..............; as the temperature ..............; and as the cross-sectional area .............. .
How should the two resistances of 2 ohms each be connected so as to produce an equivalent resistance of 1 ohm?
Which of the following is an ohmic resistance?
How would you connect two resistors in series? Draw a diagram. Calculate the total equivalent resistance.
Calculate the effective resistance across AB?

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?

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.

State and define Ohm’s law.
What is non-ohmic resistor?
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?
The ratio of the potential difference to the current is known as ________.
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 true?

The heat produced by a 100 w heater in 2 minute is equal to
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?
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.
A current of 0.8 A flows in a conductor of 40 Ω for 1 minute. The heat produced in the conductor will be ______.
