Question 1 :
How much heat is generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V?
Question 2 : <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 3 :
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 in series?
Question 4 : <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 5 :
Calculate the power used in the 2 Ω resistor in the circuit containing a a 4 V battery in parallel with 12 Ω and 2 Ω resistors.
Question 6 :
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 7 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3d273b230584979bc9.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 total circuit resistance.
Question 8 :
How is a voltmeter connected in the circuit to measure the potential difference between two points?
Question 10 :
Resistance of a metal wire of length 1 m is 26 Ω at 20°C. If the diameter of the wire is 0.3 mm, what will be the resistivity of the metal at that temperature?
Question 11 :
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 13 :
In parallel combination of resistors, the current is _____in every part of
the circuit.
Question 14 :
State true or false: When connected to the same source the current will flow more easily through a thick wire than thin wire.
Question 15 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cdf273b230584979b5b.JPG ' />
In the above figure, a student carries out an experiment and plots the V-I graph of three samples of nichrome wire with resistances $R_1, R_2 \ and \ R_3$ respectively . Which of the following is true ?
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 :
How is voltmeter connected in circuit to measure the potential difference between the two points?
Question 18 :
If the current I through a resistor is increased by 100% (assume that temperature remains unchanged), the increase in power dissipated will be
Question 19 :
State true or false: Series arrangement is used for domestic circuits.
Question 21 :
An electric iron of resistance 20 Ω takes a current of 5 A. Calculate the heat developed in 30 s.
Question 22 :
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 23 :
How is a voltmeter connected in the circuit to measure the potential difference between two points?
Question 24 :
How many number of electrons constitute 1 coulomb of charge ?
Question 25 :
In series combination of resistors, the current is _____in every part of
the circuit.
Question 26 :
The resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
Question 28 :
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 current when heating is at maximum rate?
Question 29 :
What is the commercial unit of electrical energy (Represent it in terms of joules) ?
Question 30 :
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 31 :
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 32 :
An electric motor takes 5 A from a 220 V line. How much energy is consumed in 2 h.?
Question 33 :
What is the maximum resistance which can be made using five resistors each of $\frac{1}{5}\Omega$ ?
Question 34 :
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 resistance when heating is at minimum rate?
Question 35 :
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, What will be the power consumed?
Question 36 :
How much current will an electric heater coil draw from a 220 V source, if the resistance of the heater coil is 100 Ω?
Question 37 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d74273b230584979c08.PNG' />
In the above image, Which material is the best conductor?
Question 38 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d38273b230584979bc2.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 current through the circuit.
Question 39 :
An circuit consist of a battery of three cells of 2V each , a $5\Omega$ resistor, an $8\Omega$ resistor, and a $12\Omega$ resistor and a plug key all connected in series. Also there is an ammeter to measure the current through resistors and voltmeter to measure the potential difference across $12\Omega$ resistor. What is the reading of the voltmeter?
Question 40 :
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 41 :
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 42 :
What is the equivalent resistance when 1Ω and 10$^{6}$Ω are connected in parallel?
Question 44 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cd7273b230584979b52.JPG ' />
In the above electric circuit, find out the effective resistance of two $8\Omega$ resistors in the combination
Question 46 :
Compute the heat generated while transferring 96000 C of charge in one hour through a potential difference of 50V?
Question 47 :
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 resistance of an electric iron connected to the same source that takes as much current as all the three appliances ?
Question 48 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3d273b230584979bc8.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 total current in the cicruit.
Question 49 :
How much power is used in 2$\Omega$ resistor when a 6 V battery is connected in series with 1$\Omega$ and 2$\Omega$ resistors?
Question 50 :
Which of the following terms does not represent electric power in a circuit?
