Science : Ch 12 – Electricity

The values of mA and µA are:

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is:

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?

When electric current is passed, electrons move from:

The condition for the credibility of Ohm’s law is that the

One horsepower (hp) is parallel to

Electrical resistivity of a given metallic wire depends upon:

The commercial unit of electrical energy

S.I unit of resistance

The rate at which electrical work is done or the rate at which electrical energy is consumed

When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is

An ideal ammeter is one which has

The device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential diference across a resistor

The device used for detecting and indicating an electric current.