- When two resistances, r1 and r2, are connected in series, what formula is used to find the series combination resistance?
Answer: The formula to find series combination resistance is RS = r1 + r2.
- Does the resistance depend on the dimensions of the conductor?
Answer: Yes, the resistance depends on the dimensions of the conductor.
- What is the resistance which obeys Ohm’s law?
Answer: Ohmic resistance is the resistance which obeys Ohm’s law.
- What is the resistance which does not obey Ohm’s law?
Answer: Non-ohmic resistance is the resistance which does not obey Ohm’s law.
- Give two examples of non-ohmic resistance.
Answer: Vacuum tube diodes and transistors are two examples of non-ohmic resistances.
- Give three examples of ohmic resistance.
Answer: Metallic resistance like silver, aluminium, and copper are three examples of ohmic resistances.
- When two resistances, r1 and r2, are connected in parallel, what formula is used to find the parallel combination resistance?
Answer: The formula is: R_{p}=\frac{r_{1}r_{2}}{r_{1}+r_{2}}
- Is semiconductor diode an ohmic resistance or non-ohmic resistance?
Answer: A semiconductor diode is a non-ohmic resistance.
- Define Ohm’s law.
Answer: The current that flows through most conductors is directly proportional to the voltage applied. The voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperatures remain constant.
- What is the formula of Ohm’s law?
Answer: The formula of Ohm’s law is V = IR
Where
I = current
V = voltage
R = resistance
- What are various factors that affect resistance?
Answer: The factors affecting the resistance are
- Material
- The temperature of the conductor
- Length
- Area of cross-section
Stay tuned to BYJU’S to learn more about various interesting topics in Physics!. Also know about various devices like voltameter, galvanometer, and meter bridge.
