Please select a subject first
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Conventionally, the direction of the current is taken as:
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Coulomb is the SI unit of ____________.
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When an electric current is passed, electrons move from:
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A soft iron bar is introduced inside the current-carrying solenoid. The magnetic field inside the solenoid ____________.
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If the key in the given arrangement is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane ABCD, the lines are ____________.
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What is that instrument which can detect the presence of electric current in a circuit?
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A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
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Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
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Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
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Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
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An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
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The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
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When light rays enter the eye, most of the refraction occurs at the
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How are we able to see nearby and also the distant objects clearly?
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A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly
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Which of the following represents voltage?
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Unit of electric power may also be expressed as
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A uniform magnetic field exists in the plane of paper pointing from left to right as shown in Figure. In the field an electron and a proton move as shown. The electron and the proton experience
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In the arrangement shown in Figure there are two coils wound on a non-conducting cylindrical rod. Initially the key is not inserted. Then the key is inserted and later removed. Then
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A magnetic compass shows a deflection when placed near a current carrying wire. How will the deflection of the compass get affected if the current in the wire is increased? Support your answer with a reason.
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