Science : Ch 12 – Electricity

A battery of 10 volt carries 20,000 C of charge through a resistance of 20 Ω. The work done in 10 seconds is:

Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is

The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is:

A cell, a resistor, a key, and an ammeter are arranged as shown in the circuit diagrams. The current recorded in the ammeter will be:

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

A student drives out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1 R2 and R3 respectively. Which of the following is huge?

Insulators consists of:

One horsepower (hp) is parallel to

Copper is not approved to make fuse wire because it:

The property of a conductor to oppose the flow of charges through it.

The electrical resistance of a conductor having cross-sectional area 1 m² and length 1m

S.I unit of resistance

Joule’s law of heating implies that heat produced in a resistor is directly proportional to the square of

The unit of electric power may also be expressed as

The maximum resistance which can be made using four resistors each of 2 Ohm