In an experiment of CE configuration of n–p–n transistor, the transfer characteristics are observed as given in figure.
If the input resistance is 200 Ω and output resistance is 60 Ω, the voltage gain in this experiment will be______.
In an experiment of CE configuration of n–p–n transistor, the transfer characteristics are observed as given in figure.
If the input resistance is 200 Ω and output resistance is 60 Ω, the voltage gain in this experiment will be______.
Correct Answer: 15
Solution and Explanation
Voltage gain
\(=\frac{LcRo}{L_BR_i}\)
\(=\frac{(10mA)(60Ω)}{(200μA)(200Ω)}\)
⇒ Voltage gain = 15
Top Questions on Resistance
- A coil of resistance 10 \( \Omega \) is connected to a battery of 12 V. If the current flowing through the coil is 2 A, what is the power dissipated in the coil?
- BITSAT - 2025
- Physics
- Resistance
A wire of resistance $ R $ is bent into a triangular pyramid as shown in the figure, with each segment having the same length. The resistance between points $ A $ and $ B $ is $ \frac{R}{n} $. The value of $ n $ is:
- JEE Main - 2025
- Physics
- Resistance
- What is the resistance of a conductor if the potential difference across it is 12 V and the current flowing through it is 3 A?
- VITEEE - 2025
- Physics
- Resistance
- A resistor of resistance $ 10\, \Omega $ is connected across a $ 20\, V $ battery. Calculate the current flowing through the resistor.
- BITSAT - 2025
- Physics
- Resistance
- Find the effective resistance of the network of resistors between points A and F as shown in the figure.
Questions Asked in JEE Main exam
Designate whether each of the following compounds is aromatic or not aromatic.
- JEE Main - 2025
- Aromaticity & chemistry of aromatic compounds
- In the Claisen-Schmidt reaction to prepare dibenzalacetone from 5.3 g benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was _____.
- JEE Main - 2025
- Reaction Mechanisms & Synthesis
- Consider a completely full cylindrical water tank of height 1.6 m and cross-sectional area 0.5 $ m^2 $. It has a small hole in its side at a height 90 cm from the bottom. Assume, the cross-sectional area of the hole to be negligibly small as compared to that of the water tank. If a load 50 kg is applied at the top surface of the water in the tank then the velocity of the water coming out at the instant when the hole is opened is : (g = 10 $ m/s^2 $)
- JEE Main - 2025
- Fluid Mechanics
- If \[ \int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} \frac{96x^2 \cos^2 x}{1 + e^x} dx = \pi(a\pi^2 + \beta), \quad a, \beta \in \mathbb{Z}, \] then \( (a + \beta)^2 \) equals:
- JEE Main - 2025
- Integration
- The value of \( (\sin 70^\circ)(\cot 10^\circ \cot 70^\circ - 1) \) is:
- JEE Main - 2025
- Trigonometric Identities
Concepts Used:
Resistance
Resistance is the measure of opposition applied by any object to the flow of electric current. A resistor is an electronic constituent that is used in the circuit with the purpose of offering that specific amount of resistance.
R=V/I
In this case,
v = Voltage across its ends
I = Current flowing through it
All materials resist current flow to some degree. They fall into one of two broad categories:
- Conductors: Materials that offer very little resistance where electrons can move easily. Examples: silver, copper, gold and aluminum.
- Insulators: Materials that present high resistance and restrict the flow of electrons. Examples: Rubber, paper, glass, wood and plastic.
Resistance measurements are normally taken to indicate the condition of a component or a circuit.
- The higher the resistance, the lower the current flow. If abnormally high, one possible cause (among many) could be damaged conductors due to burning or corrosion. All conductors give off some degree of heat, so overheating is an issue often associated with resistance.
- The lower the resistance, the higher the current flow. Possible causes: insulators damaged by moisture or overheating.