### XI Physics : Sample Practical Activities Part 1

For Aga Khan Board

Contains:

Topic 1: Measurement
1. 1.5.2 Determine the capacity and thickness of a test tube by using Vernier callipers. Vernier callipers, test tube.

2. 1.5.2 Measure the diameter of few ball bearings of different sizes using screw gauge and estimate their volumes.Screw gauges, steel ball bearings.

3. 1.5.2 Determine the radius of curvature of any spherical surface by using aspherometer.Spherometer, convex or concave lens/mirror.

Topic 2: Vectors and Equilibrium

4. 2.3.1
Determine the weight of a body by vector addition of forces.(Parallelogram Method)Gravesand’s apparatus, slotted weights,thread nos., plane mirror strip.

5. 2.7.2 Verify the two conditions of equilibrium using a suspended meter rod.Meter scales, hangers, slotted weights, stand.

Topic 3: Motion and Force
6. 3.3.1
Measure the free fall time of a ball using a ticker-timer and hence calculate the value of ‘g’. Ticker-tape vibrator, roll of ticker-tape, steel ball, transformer, sellotape.

### COMMON COLLECTOR CONFIGURATION OF A TRANSISTOR

COMMON COLLECTOR CONNECTION

In  this  configuration  the  input  is  applied  between the  base  and  the  collector and  the  output  is  taken  from  the  collector  and  the  emitter.  Here  the  collector  is common to both the input and the output circuits as shown in Fig.

Common Collector Transistor Circuit

In  common  collector  configuration  the  input  current  is  the  base current  IB  and  the output current is the emitter current IE. The ratio of change in emitter current to the  change in the base current is called current amplification factor.

It is represented by

COMMON COLLECTOR CIRCUIT

A test  circuit  for determining the  static characteristic  of an NPN transistor is shown in Fig. In this circuit the collector is common to both the input and the output circuits.   To   measure   the   base   and   the   emitter   currents,   milli   ammeters   are connected in series with the base and the emitter circuits. Voltmeters are connected   across the input an…