ELECTRICITY

Two lamps with A and B with power ratings 12W and 6W respectively and connected in a domestic circuit. If the amount of current that passes through lamp A is 0.12A, how much passes through lamp B?

• 0.12A
• 0.08A
• 0.04A
• 0.06A

A beam of protons and electrons collide. If the number of protons is double that of the electrons, what is the total net charge after the collision?

• +1
• 0
• +2
• -1

A rheostat can be described as a variable resistor. If the device somehow faults and reduces the resistance tremendously, what happens to the fuse that is connected to it.

• The fuse will blow.
• The fuse will short circuit.
• The fuse will increase its resistance.
• The fuse will remain intact.

If the ammeter is connected to a battery of 12V and a resistor made of an insulator. How far is the ammeter from the correct answer?

• 1A

• 2 A
• 10 A
• 5 A

What is the charge of a neutron?

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

• 1.0 x 10^20 electrons
• 3.0 x 10^18 electrons
• 2.0 x 10^21 electrons
• 5.0 x 10^19 electrons

Electrical resistivity of a given metallic wire depends upon

• Temperature of the wire

• Dimensions of the material

• Type of insulation used
• Length of the wire only

What is the minimum resistance which can be made using five resistors each of 1/2 Ω?

• 1 Ω
• 0.5 Ω
• 0.1 Ω
• 2 Ω

Two Cuboidal and cylindrical wires are taken simultaneously, if they have the same radius, same length and are made of the same material. Which one will allow more current to flow through it?

• The cuboidal wire will allow more current to flow through it.
• Both wires will allow the same amount of current to flow through them.
• The cylindrical wire will allow less current to flow through it.
• The cylindrical wire will allow more current to flow through it.

Unit of electric power may also be expressed as

• Joule-hour

• Ohm-Ampere

• Watt-hour

• Volt-Ampere