Q381
Open questionTurbines and Dyanamos are used to convert which energy to electrical energy?
Select an option to see the answer and solution.
Physics GK · all questionsElectricity and Magnetism
Electricity and Magnetism
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
524
Questions
20/27
Page
Pick an option on a question to see the right answer and solution.
Q382
Open questionIn AC circuits, AC meters measure
Select an option to see the answer and solution.
Q383
Open questionThe work done across two points having 10 V potential difference is 30 J. So the electric charge flowing between the two points will be-
Select an option to see the answer and solution.
Q384
Open questionWhen a bar magnet is cut into two equal halves, the pole strength of each piece
Select an option to see the answer and solution.
Q385
Open questionWhat is the name of the device used to convert alternating current into direct current?
Select an option to see the answer and solution.
Q386
Open questionThe amount of electric charge flowing through electric circuit in 10 minutes is 300 coulombs. Find the electric current drawn by the filament of the electric bulb is?
Select an option to see the answer and solution.
Q387
Open questionWhich one of the following can charge an insulator?
Select an option to see the answer and solution.
Q388
Open questionGiven below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A): Transformer is useful for stepping up or stepping down voltages.
Reason (R): Transformer is a device used in D.C. circuits.
In the context of the above two statements, which one of the following is correct?
Assertion (A): Transformer is useful for stepping up or stepping down voltages.
Reason (R): Transformer is a device used in D.C. circuits.
In the context of the above two statements, which one of the following is correct?
Select an option to see the answer and solution.
Q389
Open questionThe SI unit of electric charge is
Select an option to see the answer and solution.
Q390
Open questionIf a copper wire is increased to double its length, its resistance will become
Select an option to see the answer and solution.
Q391
Open questionHow much work is done in moving a charge of 4C across two points having potential difference 10 V?
Select an option to see the answer and solution.
Q392
Open questionThe metal cap of an electric cell is generally the . . . . . . . . terminal of the electrical cell.
Select an option to see the answer and solution.
Q393
Open questionWhich law of physics states that the force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled?
Select an option to see the answer and solution.
Q394
Open questionWhat is the power rating (in W) of a bulb if a current of 0.3 A passes through an application of 240 V of potential difference across its terminals?
Select an option to see the answer and solution.
Q395
Open questionA parallel plate capacitor, with air in between the plates, has capacitance C. Now, the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then, the value
of the capacitance will become
Select an option to see the answer and solution.
Q396
Open questionIf a current of 1.5 amperes remains in a resistance of 10Ω, then what will be the amount of energy expelled in 1 minute?
Select an option to see the answer and solution.
Q397
Open questionWhich of the following has the lowest electrical resistivity?
Select an option to see the answer and solution.
Q398
Open questionConduction in liquids occurs, when-
Select an option to see the answer and solution.
Q399
Open questionA fuse is a
Select an option to see the answer and solution.
Q400
Open questionThe connecting cable of electrical appliances like electric iron, water heater or room heater contains three insulated copper wires of three different colours- Red, Green and Black. Which one of the following is the correct colour code?
Select an option to see the answer and solution.