number 1b and 2b and chargeSl units.(b) A positivelycharged sphere carrying acharge of 0.4 mC is earthed using a wire.(1) Calculate the average current flowingthrough the wire if the time taken todischarge the sphere is 0.2 s.(II) Draw a labelled diagram showing thedirection of conventional current flow.(a) What do you understand by the termscurrent and potential difference?(b) A potential difference of 12 V causes2.0 x 100 electrons to pass a point in awire in 1.0 minute. Calculate the(1)amount of charge that passes the pointin 1.0 minute, given that the charge ofeach electron is 1.6 x 10-19 C;(ii) electric current in the wire;(ii) resistance of the wire.3.A light bulb is connected to a 6.0 V e.m.f. supply.An experiment is carried out to measure thecurrent flowing through the bulb as the potentialdifference across it is varied. The results areshown in Table 17.5.Table17 E

This question is based on Electric current topic. Average electric current formula:…

A positively charged sphere cartyIng charge of 0.4 mC is earthed using a wire. (1) Calculate the average current flowing through the wire if the time taken to discharge the sphere is 0.2 s. (II) Draw a labelled diagram showing the direction of conventional current flow.

A positively charged sphere cartyIng charge of 0.4 mC is earthed using a wire. (1) Calculate the average current flowing through the wire if the time taken to discharge the sphere is 0.2 s. (II) Draw a labelled diagram showing the direction of conventional current flow.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.

Question

number 1b and 2b

and charge
Sl units.
(b) A positivelycharged sphere carrying a
charge of 0.4 mC is earthed using a wire.
(1) Calculate the average current flowing
through the wire if the time taken to
discharge the sphere is 0.2 s.
(II) Draw a labelled diagram showing the
direction of conventional current flow.
(a) What do you understand by the terms
current and potential difference?
(b) A potential difference of 12 V causes
2.0 x 100 electrons to pass a point in a
wire in 1.0 minute. Calculate the
(1)
amount of charge that passes the point
in 1.0 minute, given that the charge of
each electron is 1.6 x 10-19 C;
(ii) electric current in the wire;
(ii) resistance of the wire.
3.
A light bulb is connected to a 6.0 V e.m.f. supply.
An experiment is carried out to measure the
current flowing through the bulb as the potential
difference across it is varied. The results are
shown in Table 17.5.
Table
17 E

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