Electric Circuits Answers

An emf of 100 V is applied to a series RC circuit in which the resistance is 200 ohms
and the capacitance is 10-⁴ farads. Determine the charge q(t) on the capacitor if
q(0) = 0. Also determine the current i(t).

If the resistance of a copper site at 30°C is 4 Ohm, then what will be the resistance at 100° C? The temparature coefficient of resistance of copper wire= 42.5x10^-4°C^-1.

Hi! Our sir explained to us that the voltage at the negative terminal of the battery is zero when connected in circuit. I didn't get it! could you please explain it in detail?
Also if you could explain potential difference to me that would be amazing (in terms of circuits)

In the D.C electric motor, which of the following does not apply?
(a) Spindle (b) Fixed carbon brushes (c) Powerful magnetic field (d) Slip rings

A stand-by generator is connected to fifteen 40w lamps and a musician's 600w amplifying system, how much energy is used if the generator runs for 6hrs?

state with reason whether the folowing statements are true or false ideal voltage source has infinite internal resistance

A 12.6 V battery forces 3 Coulombs of charge through a load. How much energy does the load convert?

A battery has an internal resistance of 0.30 Ω. The potential difference between its terminals is 1.48 V when a current of 0.20 A is being drawn from it.
a) What is its e.m.f.?
b) What is the power rating of a television receiver that uses 270,000 Joules to operate for 1.5 hours?

A 1.0 kg bar of copper is drawn into 0.50 mm diameter wire. Calculate
a) The length of the wire
b) The electrical resistance of the wire.
• Density of copper = 8.96 x 103 kg m-3
• Resistivity of copper = 1.68 x 10-8 Ω m

Two point charges + 4e and + e are separated by a distance of 2 m. Determine the resultant force on a charge + e placed at the mid-point of the line joining them.