Determine the resistance of metal tube in term of the external diameter D, the internal diameter d , the length l and the resistivity. Calculate the resistance of a copper tube 0.5cm thick and 2m long. The external diameter is 10cm

Materials which do not allow electric current to flow through them is known as

What do you mean by power rating of an electrical appliance? How to use it to calculate (a) the resistance of the appliance, and (b) the safe limit of current in it, while in use?

What is the difference between charge and energy? Are they interrelated

If a light burns out in a parallel circuit, what happens to other lights that may be connected and why?

The device which is used to measure electric current through a circuit is called a/an ____.
Ammeter
Voltmeter
Ohmmeter
Wattmeter

Does higher Ohms mean more Resistance?

What factors does the resistance of a conductor depend on?

Define one coulomb charge.

State Ohm's law. Draw a labelled circuit diagram to verify this law in the laboratory. Draw a V-I graph for the same and explain how would you use this graph to determine the resistance of the conductor.

The rate of flow of charges is known as
1) Electric potential
2) Electric conductance
3) Electric current
4) None of these.

If the distance between two charges is doubled, what will happen the force between the charges?

Give $3$ differences between ohmic and non-ohmic conductors.

A thick wire has smaller resistance while a thin wire has larger resistance. True or False

Which metals is the best conductors of electricity?
A)Nickel;
B)Silver;
C)Gold;
D)Sodium

How to find the exact value of ${\displaystyle \csc \left(\frac{5\pi }{6}\right)}$ using the half angle formula?