Advertisements
Advertisements
प्रश्न
Which of the following is an ohmic resistance?
विकल्प
LED
Junction diode
Filament of a bulb
Nichrome wire
Advertisements
उत्तर
Nichrome wire
Hint: Substances that obey Ohm's law are called Ohmic resistors.
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.
The relationship between the potential difference and the current in a conductor is stated in the form of a law.
1) Name the law.
2) What does the slope of V-I graph for a conductor represent?
3) Name the material used for making the connecting wire.
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Calculate the value of the resistance of the resistor.
Name the law which is illustrated by the above V−I graph.
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?
In the circuit shown below in Fig, calculate the value of x if the equivalent resistance between A and B is 4 Ω.
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?
The slope of voltage (V) versus current (I) is called:
Why should an ammeter have low resistance?
