THIS IS THE IMAGE FOR NO.1

APPARATUS:

Potentiometer, ammeter, voltsmeter, jockeykey, resistor, drycell(1.5v), connecting wires

1. Connect the circuit as shown above

2. Close the key, read and record the ammeter and voltmenter reading when the jockey key is not in contact with the potentiometer Make a contact with jockey key on the potentiometer such that the length (L=10.00cm), read and record the corresponding ammeter and voltmeter readings.

Repeat the experiment using the length of the potentiometer as 20cm, 30cm, 40cm, and 50cm respectively.

Measure and record the corresponding ammeter and voltmeter readings.

Tabulate your readings and plot a graph of I against V. determine the slope and the intercept of the graph.

State two precautions taken to ensure accurate results.

QUESTIONS:

1. State an explain the ohms law of electricity

2. Difference between e.m.f and P.D

a. The resistor in the circuit can be replaced with which device?

b. What is ohm?

c. Explain the heating effect of the circuit.

2ND PRACTICAL

APPARATUS:

Retort stand, clamp, boss head, spring balance, beaker, water,kerosene, thread (1m long), masses (50g, 100g, 150g, 200g, and 250g)

PROCEDURE:

Suspend the spring balance, tie with the thread and the mass 50g on the retort stand. Measure the weight of the mass in air. Record it as W. fill the beaker with water and record immerse the mass inside the water and record the reading of the spring balance as Ww .

determine the losing weight of the mass W-Ww using another beaker filled with kerosene.

Conduct the experiment and determine W and Wc.

Repeat experiment using the two beakers fluid with water and kerosene and masses 100g, 200g and 150g. in each case determineW-Wc respectively.

Tabulate ur readings and plot a graph of Ww on the vertical axis and Wc on the horizontal axis.

Determine the slope and intercept.

State two precautions taken to ensure accurate resut.

QUESTIONS:

1. What is the difference between mass and weight?

a. What is the unit of measuring weight ?

b. What is the weight of 20g mass in its unit?

2. What does an object experience a loss in weight when immersed in liquid?

3. Even though a piece of steel sinks in water, when a heavy ships made of steel floats in water, explain how this is possible?

a. State the law of floatation and explain the Archimedes principle.

Please make sure you cross check your questions to make sure it correspond before make use of this.

Am just doing my best to help.