Name the following.
A circuit where there is a break such that electric current cannot pass through

Sound cannot pass through vacuum.

Name the following. The device which detects the presence and direction of electric current

Name the following. Uninterrupted circuit through which electric charges can pass

Compounds which do not allow electric current to pass through them.

Name the following. The kind of circuits used to connect household electrical items

Name the following. The branch of physics that deals with the magnetic effect of electric current

An ac ammeter is used to measure currnet in a circuit. When a given direct current passes through the circuit. The ac ammeter reads 3 A. When another alternating current passes through the circuit, the ac ammeter reads 4A. Then find the reading of this ammeter (inA), if dc and ac flow through the circuit simultaneously.

In the following circuit the current flowing through zener diode is

State whether the following are physical or chemical changes. passing electric current through a heater's rod

Name the following An alloy of lead and tin that is used in electrical circuits.