Electric Circuits Answers

There are three 20.0 ohm resistors in series across a 120.0-V generator. What is the equivalent resistance of the circuit?
What is the current in the circuit?
What is the total voltage drop across the circuit?

Design and draw a voltage comparator circuit using op-amp IC 741 to give +VSat at
the output if the input voltage is less than −3V and −VSat for input more than −3V.

Design and draw a voltage comparator circuit using op-amp IC 741 to give +VSat at the output if the input voltage is less than -3V and -VSat for input more than -3V.
b) Design and draw the circuit of a voltage regulator using LM 317 to provide an adjustable voltage between 6 to 12V.

A horizontal rod of mass 10kg and length 12m is hinged to a wall at one end and support end by a cable which makes an angle 30° with the rod at its other end.calculate tension in the cable and force exerted by hinge

What is an electric circuit?

1.factors that affect time constant
2.what will happen to time constant if the Emf of a power supply is increased?

A student investigated the power of another battery charger using the equipment in Figure 2 (power supply, battery charger, joulemeter, battery and clock) describe how the equipment can be used to find the power of this batter charger.

A circuit is of a 50 W heater connected to a four-cell battery. a) Calculate the potential difference of the battery. (Each cell is 3.5 V). b) Calculate the flowing through the heater. c) Write down the equation that links energy transferred, power and time. d) Calculate the energy transferred to the heater when it is used for 10 minutes.

In L-C-R circuit, Does the current and voltage are in the same phase only at a single
frequency

A light of amplitude ‘a’ is incident obliquely on a parallel thin film. If ‘r’ and ‘t’
represent the fractions of incident light reflected and transmitted respectively, draw a
diagram to explain multiple reflection of incident light and write the amplitudes of
successive rays.