Question 1 : In a schematic diagram of a circuit consisting of a battery of three cells of 2 V each, a 5 ohm resistor, a 8 ohm resistor and a 12 ohm resistor and a plug key, all connected in series and put an ammeter to measure the current through the resistors and a voltmeter to measure the potential difference across 12 ohm resistor. What will be the readings in ammeter?

Question 2 : How much current will an electric bulb draw from a 220 V source, if the resistance of the bulb filament is 1200 Ω?

Question 4 : An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.

Question 5 : Calculate the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.

Question 6 : An electric iron consumes energy at a rate of 840 W when heating is at the maximum rate and the voltage is 220 V. What is the resistance when heating is at maximum rate?

Question 7 : What determines the rate at which energy is delivered by a current?

Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cda273b230584979b55.JPG ' /> In the above electric circuit, find out the power dissipated in $4\Omega$ resistor .

Question 9 : In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source . Which of the following is likely to happen regarding their brightness ?

Question 10 : A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 $\Omega$ resistance. What is the current when they are used separately?

Question 12 : Two conducting wires of same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference, the ratio of heat produced in series and parallel combinations would be

Question 13 : In series combination of resistors, the current is _____in every part of the circuit.

Question 14 : When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. What is the value of the resistance of the resistor?

Question 15 : What is the equivalent resistance when 1Ω ,10$^{6}$Ω and $10^{3}$Ω are connected in parallel?

Question 16 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d35273b230584979bbf.PNG' /> Above image is the symbol of ______ in circuit diagram.

Question 17 : Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?

Question 18 : What is the name of a device that helps to maintain a potential difference across a conductor?

Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3e273b230584979bca.jpg' /> In the above diagram, $R_{1}$= 10 Ω, $R_{2}$= 40 Ω, $R_{3}$ = 30 Ω, $R_{4}$= 20 Ω,$R_{5}$ = 60 Ω, and a 12 V battery is connected to the arrangement. Calculate the total resistance in the circuit.

Question 21 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d34273b230584979bbe.PNG' /> Above image is the symbol of ______ in circuit diagram.

Question 22 : Which instrument is used to measure electric current in a circuit?

Question 23 : Calculate the power used in the 2 Ω resistor in the circuit containing a 6 V battery in series with 1 Ω and 2 Ω resistors.

Question 24 : What is the highest total resistance that can be secured by combinations of four coils of resistance 4 Ω, 8 Ω, 12 Ω, 24 Ω?

Question 25 : How is voltmeter connected in circuit to measure the potential difference between the two points?

Question 26 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d30273b230584979bb9.PNG' /> Above image is the symbol of ______ in circuit diagram.

Question 27 : An electric lamp of $100\Omega$, a toaster of resistance $50\Omega$, and a water filter of resistance $500\Omega$ are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all three appliances?

Question 29 : A copper wire has diameter 0.5 mm and resistivity of $1.6×10^{-8}Ω$m. What will be the length of this wire to make its resistance 10 Ω?

Question 30 : A circuit consisting of a battery of three cells of 2 V each, a 5 Ω resistor, an 8 Ω resistor, and a 12 Ω resistor, and a plug key, all connected in series. If the voltmeter is connected across 12 Ω resistor,what would be the readings in voltmeter?