Question 1 :
How many 176 $\Omega$ resistors (in parallel) are required to carry 5 A on a 220 V line?
Question 2 :
How many 176 Ω resistors (in parallel) are required to carry 5 A on a 220 V line?
Question 3 :
What is the equivalent resistance when $10^6\Omega$ , $1\Omega$ and $10^3\Omega$ are connected in parallel?
Question 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d33273b230584979bbd.PNG' />
Above image is the symbol of ______ in circuit diagram.
Question 5 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3a273b230584979bc5.jpg' /> In the above diagram, the resistors $R_{1},R_{2},R_{3}$ have the values 5 Ω, 10 Ω, 30 Ω, respectively, which have been connected to a battery of 12 V. Calculate the current through $R_{1}$.
Question 6 :
How much energy is given to each coulomb of charge passing through a 6 Volt battery?
Question 7 :
An electric iron of resistance 20 ohm takes a current 5 A. Calculate the heat developed in 30 s.
Question 8 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3b273b230584979bc6.jpg' /> In the above diagram, the resistors $R_{1},R_{2},R_{3}$ have the values 5 Ω, 10 Ω, 30 Ω, respectively, which have been connected to a battery of 12 V. Calculate the current through $R_{2}$.
Question 9 :
How is a voltmeter connected in the circuit to measure the potential difference between two points?
Question 10 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d2e273b230584979bb6.PNG' />
Above image is the symbol of ______ in circuit diagram.
Question 11 :
A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. Find the amount of electric charge that flows through the circuit?
Question 12 :
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 13 :
A battery of 9 V is connected in series with resistors of 0.2 Ω, 0.3 Ω, 0.4 Ω , 0.5 Ω and 12 Ω, respectively. How much current would flow through the 12 Ω resistor?
Question 14 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cde273b230584979b5a.JPG ' />
In the above figure, the proper representation of series combination of cells obtaining maximum potential is -
Question 15 :
What is the commercial unit of electrical energy (Represent it in terms of joules) ?
Question 16 :
An electric motor takes 5 A from a 220 V line. How much energy is consumed in 2 h.?
Question 17 :
Two lamps, one rated 100 W at 220 V, and the other 60 W at 220 V, are connected in parallel to electric mains supply. What current is drawn from the line if the supply voltage is 220 V?
Question 18 :
Several electric bulb designed to be used on a 220 V electric supply line are rated at 10 W. How many lamps are connected in parallel with each other across two wires 220 V line, if the maximum allowable current is 5 A?
Question 19 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d33273b230584979bbc.PNG' />
Above image is the symbol of ______ in circuit diagram.
Question 20 :
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?
Question 21 :
Two resistors of resistance $2\Omega \ and \ 4\Omega$ when connected to a battery will have
Question 22 :
What is the equivalent resistance when 1Ω ,10$^{6}$Ω and $10^{3}$Ω are connected in parallel?
Question 23 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3c273b230584979bc7.jpg' /> In the above diagram, the resistors $R_{1},R_{2},R_{3}$ have the values 5 Ω, 10 Ω, 30 Ω, respectively, which have been connected to a battery of 12 V. Calculate the current through $R_{3}$ .
Question 24 :
How much energy is given to each coulomb of charge passing through a 6 V battery?
Question 25 :
A piece of wire of resistance R is cut into five equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R′, then the ratio $\frac{R}{R'}$ is?
Question 26 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cda273b230584979b56.JPG ' />
In the above electric circuit, there is no difference in the reading of ammeters $A_1$ and $A_2$. Is it TRUE or FALSE ?
Question 28 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d73273b230584979c07.PNG' />
In the above image, Which among iron and mercury is a better conductor?
Question 29 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d38273b230584979bc3.jpg' /> In the above figure, an electric lamp, whose resistance is 20 Ω, and a conductor of 4 Ω resistance are connected to a 6 V battery. Calculate the potential difference across the electric lamp.
Question 30 :
Which device is used to change the resistance in the circuit?
Question 32 :
An electric iron consumes energy at a rate of 360 W when the heating is at the minimum and the voltage is 220 V. What is the current when heating is at minimum rate?
Question 33 :
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 voltmeter?
Question 34 :
An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?
Question 35 :
An electric iron of resistance 20 Ω takes a current of 5 A. How much heat is developed in 30 s?
Question 37 :
Two conducting wires of the 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. What will be the ratio of heat produced in series and parallel combinations?
Question 38 :
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be
Question 39 :
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 40 :
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 equivalent resistance?
Question 41 :
An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.
Question 42 :
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 44 :
Which of the following terms does not represent electrical power in a circuit?
Question 45 :
What is the lowest total resistance that can be secured by combinations of four coils of resistance 4 Ω, 8 Ω, 12 Ω, 24 Ω?
Question 46 :
Calculate the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.
Question 48 :
Compute the heat generated while transferring 96000 C of charge in one hour through a potential difference of 50V?
Question 49 :
An electric lamp of 100 ohm, a toaster of 50 ohm and a water filter of resistance 500 ohm are connected in parallel to a 220 V source. What is the current through an electric iron connected to the same source that takes as much current as all the three appliances?
