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Why should switches always be connected to the live wire?
What resistance must be connected to a 15 Omega resistance to provide an effective resistance of 6 Omega ?
Fig. below shows two bulbs with switches and fuse connected to the mains through a three pin socket by means of a three wires cable. Label each component - bulb, switch, fuse and socket.
The diagram in Fig. shows the electrical system of a car to operate the two head lights and two rear lights by a switch. shows a connection to the body of the car. The diagram shows only one lead from the battery to each bulb, but a complete circuit must have two leads. How does the current get back to the battery?
A power circuit uses a cable having three different wires. To which wire should the switch and fuse be connected ?
The diagram below shows a dual control switch circuit connected to a bulb. Copy the diagram and complete it so that the bulb is switched ON.
Name the colour code of the wire which is r connected to switch for the appliance
In the circuit, a battery of emf E, a resistance R and inductance coil L_(1) and L_(2) and switch S are connected as shown. In Fig. Initially the switch is open
An inductor L and a resistance R are connected in series with a battery of emf E and a switch. Initially the switch is open. The switch is closed at an instant t = 0. Select the correct alternatives
An inductor is connected to a battery through a switch. The emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when the switch is closed. Is this statement true or false?
