Uniben Physics 109 Report

Search This Blog

Contact

Get link
Facebook
X
Pinterest
Email
Other Apps

Name:
E-mail: *
Message: *

Get link
Facebook
X
Pinterest
Email
Other Apps

EXPERIMENT WITH SPIRAL SPRING

TITLE OF EXPERIMENT: Experiment with spiral spring APPARATUS: Spiral spring to which a light point is attained by the Plasticine at a lower end, stand and clamp, meter rule, scale pan, or mass hanger, slotted weight and stop watch. DIAGRAM AIM: To verify hook's law for a spiral spring and to determine the force constant of a spring I.e the force required to produce unit extension THEORY OF THE EXPERIMENT: When a load F suspended from lower free end of a spring hanging from rigid support, it increases it’s length by amount X which gives Mathematically F=KX F= FORCE LOAD X= DISPLACEMENT K= FORCE CONSTANT PROCEDURE: 1 . The spring with the scale pan attached is firmly clamped and the meter scale placed vertically so that the pointer moves lightly over it. 2 . Loads are added to the scale pan by successive increase end of zog. 3 . The spring noted. 4 . The scale reading are also taken when unloading the spring and mean extension thus obtained. 5 . Tabulate as follows ma

EXPERIMENT TO INVESTIGATE THE BEHAVIOUR OF AN INDUCTIVE RESISTANCE IN A.C CIRCUIT

AIM: to determine the behavior of an inductive resistivity of an A.C circuit. APPARATUS: low voltage AC supply(10-12 volts). Fixed inductance (0.1HZ) with negligible distance variable non inductive resistance (standard plug- in box with 5-ohm steps). A.C ammeter with range0.1A, A.C voltmeter and key switch. Theory ; For the circuit shown in the diagram above, I=V/Z =V/ X is called the inductive reactance of the coil and it is given as (2∏L) Where F= frequency of mains supply=60 circles per seconds. L= inductance of the coil. It therefore follows that Z^2 =R^2 + X^2 Thus creating a graph of Z^2 against R^2 will yield a straight line as the figure below The intercept OA =x^2 =(2∏FL)^2 Hence, from the inductance of the coil maybe calculated L=(OA)1/2÷2∏F PROCEDURE Plug in the power source to the mains and connect the low voltage output as shown in figure 23a above with the key switch open. When you have finished, connect out the circuit (ensure to ask the in

METER BRIDGE EXPERIMENT

METER BRIDGE AIM:To determine the unknown resistance of a given wire using a metre bridge. APPARATUS:Leclanche cell,a center zero galvanometer, resistance box, sliding contact or Jockey meter bridge. DIAGRAM: THEORY:The meter bridge operates under the wheatstone principle.here the current from the battery divides between the two branches ABC and ADC.since the potential drop is the same along the two branches, corresponding intermediate points B and D may be found which are at the same potential.under these circumstances no current will flow through a galvanometer connected between B and D.the bridge is then said to be balanced and then R1/R2=R3/R4. METER BRIDGE:This is one practical arrangement of the wheatstone bridg.in this form,one of the branches ADC consists of a wire of uniform cross section and of length 100cm.the point D is located by a sliding contact.the unknown resistance X is placed in one arm of the other branch,the remaining arm containing the known resistance

Powered by Blogger