18 solutions available
Question 4Write symbols and state functions of each of the following components in an electric circuit —(i) key(ii) cell(iii) rheostat(iv) ammeter(v)...
Question 5In the electric circuit shown in the figure below, label the parts A, B, C, D, E, and F. State the function of each part. Show in the...
Question 6(a) Complete the circuit given in figure by inserting between the terminals A and C, an ammeter. (b) In the diagram mark the polarity at...
Question 8A battery is correctly represented by :
Question 12A ............... is either used to detect the presence of a weak current or to only know the direction of flow of current in a...
Question 13Insulators have ............... electrons and conductors have ............... electrons.no free, large number of freelarge number of free,...
Question 14An insulator of electricity is:copperacidulated waterhuman bodysilk
Question 15The presence of ............... in the path makes a circuit incomplete and current does not flow.conductorammetervoltmeterinsulator
Question 16Select the insulator among the followingPure waterHuman bodyAluminiumMercury
Question 17Connecting wires are made of substances that have :highly conducting materialnegligible resistancefree electrons in a large numberall of...
Question 18Out of the following circuits shown, the bulb glows in which one?
Question 3When starter motor of a car is switched on for 0.8 s, a charge 24 C passes through the coil of the motor. Calculate the current in the coil.
Question 9A galvanometer has an 'O' mark at the middle, while a voltmeter and ammeter has the mark at the left hand corner of the dial. Explain.
Question 10The resistance of a conductor would be ............... if a current of 2 A flows through it when the potential difference across its ends...
Question 11While performing an experiment, a student reduces the resistance to one half keeping the potential difference same. New reading of the...
Question 1In transferring 1.5 C charge through a wire, 9 J of work is done. Find the potential difference across the wire.
Question 2How is the current flowing in a conductor changed if the resistance of conductor is doubled keeping the potential difference across it the...
Question 7Define the term potential difference.