Electric Circuits Answers

What is the reason fir adding a donor element to a semiconductor?

What is photon?

Two identical lamps, each of resistance 8Ω are connected in parallel. They are connected to a 12V battery.
Use the equation I=v/r to calculate the current through one lamp

A long straight wire carries a current of 15 amps.What is the direction of the magnetic fields produced at 4 cm above the wire

An appliance connected to the 230v mains supply has a resistance of 23 ohms and is on for 2.5 hours per day. Work out how much energy the appliance uses per day and give an appropriate unit

Calculate the total resistance in the circuit below and the value of 4 Ω1 Ω 12V 12 Ω8 Ω

A battery is replaced with one of lower emf. State and explain how the resistance of the lamps would have to change in order to achieve the same brightness.

Design a zener regulated power supply to give 9.1V DC output with maximum load current of 50 mA. Assume that the minimum Iz required for proper functioning of zener diode is 5 mA, and the unregulated DC input is 12V. Indicate the value of Rs and power rating of zener diode and Rs.

If gap develops in the path of electrical charges the circuit is said to be

in an experiment the voltmeter reads 12v the ammeter 4 amp a mettalic block of mass 1kg os heated in 300s which cause a raise in temprature by 16 degree Celsius calculate the specific heat capacity of the metal