Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर १
On sphere A there will be negative charge & one sphere B there will be positive charge
उत्तर २
When we bring a positively charged rod near the sphere A, The free electrons in the spheres are attracted to the rod. This leaves an excess of positive charge on the farther surface of sphere B. Now after separating the spheres and removing the rod, the charges on spheres rearrange themselves and get uniformly distributed over them, as shown in Figure given below.
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?
Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s law.
Rewrite the following statement by selecting the correct option.
The S.I. unit of resistance is __________.
Define ampere and volt with respect to Ohm’s law.
State the limitations of Ohm’s law.
What is non-ohmic resistor?
What are non-ohmic conductors? Give one exmaple. Draw a current-voltage graph for a non-ohmic conductor.
Explain the equivalent resistance of a parallel resistor network.
An electronics hobbyist is building a radio which requires 150 Ω in her circuit, but she has only 220 Ω, 79 Ω, and 92 Ω resistors available. How can she connect the available resistors to get the desired value of resistance?
Suppose there is a circuit consisting of only resistances and batteries and we have to double (or increase it to n-times) all voltages and all resistances. Show that currents are unaltered. Do this for circuit of Example 3.7 in the NCERT Text Book for Class XII.
