please guide me about theory to find frequency of ac through sonometer ....etc

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I can't get my sonometer readings ..pls give me a readings pls pls help me ....etc

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Question 71Back to Top
Question: List the uses of solar cells.

Answer: A Solar cells or solar cell panels are used in:
1) Artificial satellites and in space probes like Mars orbiters
2) Wireless transmission systems or TV relay stations in remote locations
3) Traffic signals, calculators and in toys

Question 72Ba ....etc

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I WANT VIVA QUESTONS AND ITS ANSWERS FOR PN JUNCTION DIODE EXPERIMENT? ....etc

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Materials Required: A Resistance wire, voltmeter, ammeter, battery, rheostat, meter scale, one way key, connecting wires etc.

Theory: If I be the current flowing through a conductor & V be the potential difference across its ends, then according to Ohm s law
V I
or V = RI
Where, R is the constant of proportionality. It is known as resistance of the conductor.
V/I=R
R depends upon the nature of material, temperature & dimensions of the conductor.

Procedure:
1. Clean the ends of the connecting wires with the help of sand p ....etc

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Physics Lab Viva Voce

(1) Torsional Pendulum :
(1) Define Rigidity of modulus ?
Ans : When tangential surface forces are applied on a body , the successive layers of the material are moved or sheared.This type of strain is called shearing strain. The ratio of tangential stress to shearing strain is called Rigidity of modulus
Rigidity of modulus= Tangential stress / shearing strain.
Tangential stress = Force/Area.
Shearing strain=
(2) Define Moment Of Inertia ?
Ans : It is the measure of the inertia of a body in rot ....etc

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A sound level meter is a hollow wodden box used in the laboratory to study the transverse vibrations of the string. It is also called monochord because it often has only one sequence. In the rectangular box of wood there are two fixed bridges, near the ends, and at one end there is a pulley. A rope, often a steel wire is attached at one end over the bridges and pulley, and attached to a weight support that hangs below the pulley. Weights may be added to the support to cause tension in the wire, and a third movable bridge may be placed below it ....etc

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Q.1: What is meant by electric current?
Ans. The flow of electrons.

Q.2: What are A.C. and D.C. currents?
Ans. Alternating current (A.C.) changes its direction with a definite frequency. The direct current (D.C.) flows in one direction only.

Q.3: What is meant by frequency?
Ans. Number of vibrations per sec.

Q.4: What is the frequency of A.C. in Nepal?
Ans. 50 cycles/s.

Q.5: What types of waves are produced in the thread?
Ans. Transverse stationary waves.

Q.6: What kind of vibrations are produced in the thread?
Ans. Forced ....etc

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Physicslab Sonometer Viva Questions
01. What is the principle involved in Sonometer experiment?
Ans: Resonance
02. Which type of waves are produced in Sonometer experiment?
Ans: Stationary Transverse waves
03. What are transverse waves?
Ans: If the vibrations of the particles are perpendicular to the propagation of the wave, those waves are said to be transverse waves.
04. Which type of transformer is used in sonometer experiment and what is it?
Ans: Step down transformer. It is a device, which converts high voltage currents to low volt ....etc

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Our Objective:

To determine the frequency of alternating current using a sonometer.

The Theory:

A sonometer is an apparatus used to study the transverse vibrations of stretched strings. It is in the form of a hollow wooden rectangular box. On the wooden rectangular box there are two bridges and a pulley at one end. A wire string is attached to one end of the wooden box, run over the bridges and pulley and carries a weight hanger at the free end

A sonometer is used to determine the frequency of alternating current. A step down transformer ....etc

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