Question Library

Which of the following sets of quantities is fundamental?

Which of the following is/are in random motion? i. Pollen grains in water ii. The molecules of hydrogen gas ii. Fine chalk particles floating in air

A very sensitive spring balance was used to determine the weight of an object at the north pole. When the same spring balance was used to measure the weight of the same object at the equator, it was found to reduce. The explanation for this observation is that

The diagram above illustrates a Hare's apparatus. \(\mathit{e}_1, \mathit{e}_2\) represent densities and \(\mathit{h}_1, \mathit{h}_2\) heights of columns of liquids. Which of the following equations is correct?

It takes a shorter time for a liquid to boil at the top of a mountain than at the base because at the top, the

Which of the following defects of vision is as a result of the eye ball being too long?

Fleming's right hand rule is also called the

Three capacitors each of capacitance 1.5\(\mu F\) are connected in series. The total capacitance in the circuit is

Which of the following actions will not increase the sensitivity of a moving coil galvanometer?

Control in nuclear reactors is effected with boron rods because rhe rods have the ability to

You are provided with two resistance wires labeled A and B, a1\(\Omega\) standard resistor Rx, and other necessary apparatus. Connect \(R_x\) in the left-hand gap of the metre bridge, a length L= 100cm of wire A in the right-hand gap, and the other apparatus as shown in the diagram above. Determine and record the balance point P on the bridge wire NQ. Measure and record \(l_x\) = NP and \(l_y\) = PQ. Evaluate \(R_1\) = \(\frac{I_{y}}{L_{x}}\) = \(R_x\) Repeat the procedure for four other values of L= 95, 85, 75 and 65cm. In each case, determine and record the balance point P and the length \(l_x\) and \(l_y\). Also, evaluate \(R_1\). Repeat the experiment with the second wire B. Obtain the balance points P and the values of and \(l_x\) and \(l_y\). Evaluate \(R_1\) = \(\frac{I_{y}}{L_{x}}\) = \(R_x\) in each case. Tabulate your readings. Plot a graph of \(R_2\) on the vertical axis against \(R_1\) on the horizontal axis. Determine the slope, s, of the graph. Evaluate k = \(\sqrt s \). State two precautions taken to obtain accurate results. (b)i. State two advantages of using a potentiometer over a voltmeter for measuring the potential difference. ii. Define the internal resistance of a cell.

A wire gradually stretched by loading it until it snaps. (a) Sketch a load-extension graph for the wire (b) Indicate on the graph the (i) elastic limit (E); (ii) yield point (Y); (iii) breaking point (B).

Use the diagram to answer question; Camphor is a chemical that sub-limes and interacts with water reducing the surface tension where it is put. Explain why the toy boat illustrated above would move forward with the camphor placed at the back of it but would be stationary before the placement of the camphor.

The blade of a hoe feel colder to touch in the morning than the wooden handle because the

The bond that forms a semiconductor is?