Question Library

The process of energy production in the sun is?

In which of the following states of matter do the molecules vibrate about their mean positions?

Which of the following properties of a steel bar can be measured in terms of the dimension of length only?

The period of a simple pendulum of length 80.0cm was found to have doubled when the length of the pendulum was increased by X. Calculate X.

When table salt is added to ice, the melting point of the ice

Which of the following is used to measure relative humidity?

The maximum displacement of a vibrating tunning fork is its

A wire of resistivity 4.40 x 10-5\(\Omega\) cm has a cross sectional area of 7.50 x 10-4 cm2. Calculate the length of the wire that will be required to make a 4.0\(\Omega\) resistor

An inductor of inductance 1.0H is connected in series with a capacitor of capacitance 2.0\(\mu F\) in an a.c. circuit. to resonate

1. Connect the circuit as shown in the diagram above. PQ is a potentiometer wire 100 cm long and R is a standard resistor of 5\(\Omega\). 2. With the jockey J not making contact with PQ, close the switch. Read and record the ammeter reading I. Open the switch. 3. Use the jockey to make contact with PQ at the 20cm mark such that PJ = I = 20 cm. Close the switch, read and record the value \(I_i\) of the ammeter. Evaluate I\(^{-1}\). 4. Repeat the procedure for other values of I = 35, 50, 65, and 80 cm. In each case, determine the corresponding values of \(I_i\), and I\(^{-1}\). Tabulate your readings. Plot a graph of I\(^{i}\) on the vertical axis and \(I_i\), on the horizontal axis, starting both axes from the origin (0, 0). From your graph deduce the value, of \(I_o\) of \(I_i\), when I\(^{-1}\)= 0. Evaluate \(I_o\)e State two precautions taken to ensure accurate results. (b)) Define the e. m.f. of a battery ii. A cell X e.m.f. 1.00 V is balanced by a length of 40.0 cm on a potentiometer wire. Another cell Y is balanced by a length of 60.0 cm on the same wire. Calculate the e.m.f. of Y.

The space between the two walls of a vacuum flask is completely evacuated to reduce heat loss by

Which of the following substances undergoes sublimation?

In which of the following fields is repulsion NOT experienced?

Which of the following phenomena is responsible for the spherical shape of soap bubbles?

Inertia is the property of a body which makes the body to