Electric Circuits Answers

A gas mixture consists of 2moles of oxygen and 4 moles of argon at temperature T.Neglecting all vibrational mode,the total internal energy of the system is

A charge Q on a conductor at time t is given by:-
Q = Q°(1 - e^-t/T)
Where Q° and T are constants.
a) Find the current I at any time t and
b) Sketch the variations of I and Q with time.

SERIES CIRCUIT:

In the circuit, the total voltage source is 30.0 V, R1 = 4.0 x 10^1 Ω and R2 = 15 Ω. After 10 seconds, how many coulombs of charge has passed through the circuit?

A coil of wire with 50 turns and 10 cm diameter is placed perpendicularly to a uniform magnetic field of 0.03 T. Calculate the induced e.m.f. if the coil is flipped 60 degree in 30 ms. The coil is connected to an electrical instrument that has resistance of 35 ohm. Calculate the induced current flows in the coil.

A small sphere of mass 5.10g is hanging vertically from an insulating thread that is 12.0 cm long. By charging some nearby plates, the sphere is subjected to a horizontal electric field of magnitude 7.20 N/C. As a result the sphere is displaced 6cm horizontally in the direction of the electric field.
(i) What is the angle that the thread makes with the vertical?
(ii) What is the tension in the thread?
(iii)What is the charge on the sphere?

Two Styrofoam balls of mass 10.0 g are suspended by threads of length 25cm. The balls are charged, after which they hang apart, each at to the vertical. Find the net charge on each ball assuming that the charges are equal.

x) Siemens wattmeter can be used to measure dc power. define
true and false with reason?

ix) All the logic gates can be realized using combination of only AND gates. . define
true and false with reason?

The highest hexadecimal number counted with 8-bits is 7E. define
true and false with reason?

Non-inverting amplifier uses op-amp in positive feedback mode .define
true and false with reason?