Physics
The voltage - current readings of a certain material are shown in the table given below :
| Voltage (V) | Current (I) |
|---|---|
| 10 V | 2 A |
| 20 V | 3 A |
| 30 V | 4 A |
Study the table.
(a) State whether the conductor used is ohmic or non-ohmic.
(b) Justify your answer.
(c) State Ohm’s law.
Related Questions
In the given diagram, a vibrating tuning fork is kept near the mouth of a burette filled with water. The length of the air column is adjusted by opening the tap of the burette. At a length of 5 cm of the air column, a loud sound is heard.
(a) Name the phenomenon illustrated by the above experiment.
(b) Why is a loud sound heard at this particular length?
(c) If the present tuning fork is replaced with a tuning fork of higher frequency, should the length of the air column increase or decrease to produce a loud sound? Give a reason.
Below is the diagram of a transformer :
(a) Identify the type of transformer.
(b) In this type of transformer which of the wire is thicker, the primary or the secondary? Give a reason.
Study the diagram :
(a) Calculate the total resistance of the circuit.
(b) Calculate the current drawn from the cell.
(c) State whether the current through 10 Ω resistor is greater than, less than or equal to the current through the 12 Ω resistor.