Question 1 :
What is the equivalent resistance when 1Ω and 10$^{6}$Ω are connected in parallel?
Question 2 :
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 3 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d41273b230584979bcd.jpg' /> In the above image,the values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given. Find the mean resistance.
Question 4 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d3f273b230584979bcb.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 the total current flowing in the circuit.
Question 5 :
Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
Question 6 :
A battery of 9 V is connected in series with resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm, 0.5 ohm and 12 ohm, respectively. Find total resistance.
Question 7 :
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, What will be the power consumed?
Question 8 :
State true or false: When connected to the same source the current will flow more easily through a thick wire than thin wire.
Question 9 :
An electric motor takes 5 A from a 220 V line. How much energy is consumed in 2 h.?
Question 10 : <img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c7a273b230584979ae7.jpg' />
In the above image, electrical resistivity of some substances at 20° C is given. Which among iron and mercury is a better conductor?
Question 11 :
How is voltmeter connected in circuit to measure the potential difference between the two points?
Question 12 :
An electric refrigerator rated 400 W operates 8 hour/day. What is the cost of the energy to operate it for 30 days at Rs 3.00 per kW h?
Question 13 :
An electric heater of resistance 8 Ω draws 15 A from the service mains 2 hours. Calculate the rate at which heat is developed in the heater.
Question 14 :
What is meant by saying that the potential difference between two points is 1 V?
Question 15 :
A cylindrical conductor of length l and uniform area of cross-section A has resistance R. Another conductor of length 2l and resistance R of the same material has area of cross section
Question 16 :
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. What would be the readings in ammeter?
Question 17 :
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 current through an electric iron connected to the same source that takes as much current as all three appliances?
Question 18 :
How is a voltmeter connected in the circuit to measure the potential difference between two points?
Question 19 :
Which of the following terms does not represent electrical power in a circuit?
Question 20 : <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 21 :
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 22 :
An electric bulb is rated 220 V and 100 W. What will be the power consumed if it is operated on 110V?
Question 23 :
How many number of electrons constitute 1 coulomb of charge ?
Question 24 :
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 25 :
Two resistors of resistance $2\Omega \ and \ 4\Omega$ when connected to a battery will have
