Electric Circuits Answers

Derive an expression for heat produced in an appliance of resistance R when current is I passed through it for time T.Find power dissipated across 4 ohm resistor.Is reading of A1 and A2 different?

A TV set shoot out a beam of electrons the beam current is 10 uA how many electrons strike the TV screen in each second how much charge strikes The screen in a minute

A signal is measured to have a peak voltage of 4v and a VRMS of 2.3 v.
Is it a sinusodial square wave or triangular wave signal?

In an a.c. circuit I and E are given by I=100sin(100t+π⁄3) mA and E=100sin100t volt. what is the power dissipated in the circuit?

6. b) Explain the different between the monochrome and colour television receivers with
the help of appropriate block diagram.

a 1m long resistance wire ,an ammeter and a 2.0v cell are connected in series (the ammeter and the cell have negligible resistance) the ammeter reads 0.50A,calculate,the resistance of the wire?b)the resistance wire is replaced by a 1m long wire of the same material but twice the cross- sectional area ,what is ,i) the resistance of this wire?ii)what is the new ammeters reading?

When a particular cell is in an open circuit,the pd between its terminal is 1.50v.when a 5ohm resistor is connected between the terminals,the pd drop to 1.25v .when the 5ohm resistor is replaced by the a resistance x,the pd become 1.00v .caculate (1) the internal resistance of the cell end (2) the value of the resistance x?

A battery of two cells in series each of emf of 1.5v and internal resistance of 1 ohms is connected to a 5 ohms resistor in series with a parallel combination of two 2 resistance.a,draw the circuit diagram for this set up.b,calculate the effective external resistance ?ii,calculate the current in the circuit ?iii,calculate the loss voltage in the battery?

What is the resistivity of a cylindrical material wire whose 1.0m length has a resistance of 2.0 ohms?the diameter of the wire is 0.5ohms.

what is the net resistance of a parallel circuit?