Electricity and...

For which of the substances, resistance decreases with temperature?

Unit of specific resistance is:

When a steady electric current passes through a wire, it creates a magnetic field around it. This was proved by:

In household circuit, all electrical appliances are connected in:

Name of the instrument presented below is _______________.

An electric bulb is marked 60W – 230 volts. What current does it take?

A conducting wire of length 2 meter and cross sectional area of 4 m² has resistance of 4 Ω. What is the resistivity of the wire?

The power of electromagnet can be increased:

An external resistance R is connected to a cell of internal resistance ‘r’. The current in the circuit is maximum when ________.

A work of 10J is done in moving 10C charge in an electric field from Point A to point B. The potential difference between point A and B:

A wire of length 80 cm has resistance of 3.5 Ω. The length of similar wire of resistance 10.5 Ω is:

A man has ten 1/10 ohm resistors. What is the smallest resistance he can make with them?