CBSE Class X – Science Physics Exam (Full Syllabus)

Inside the magnet, the field lines move from :

The magnetic feld inside a long straight solenoid carrying current is:

The strength of each of magnet reduces to half when it cut along its length into the equal parts magnetic field strength of a solenoid. Polarity of solenoid can be determined by:

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

The current which is created due to the relative motion of coil or magnet

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along

The phenomenon discovered by Faraday.

You are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic feld lines around the wire.explain

The instrument used for measuring electric current is:

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

The resistivity does not change if:

The condition for the credibility of Ohm’s law is that the

Copper is not approved to make fuse wire because it:

The commercial unit of electrical energy

At the time of short circuit, the electric current in the circuit

The equivalent resistance of a series combination of two resistances is X Ohm. If the resistance are of 10 Ohm and 40 Ohm respectively, the value of X will be:

The maximum resistance which can be made using four resistors each of 2 Ohm

Ankit remarked that he has seen wavering of objects when seen through a stream of hot air rising above a tandoor or a fire. He said that the air just above the fire becomes hotter than the air further higher up. He further said that this wavering can also be seen in the earth’s atmosphere as the earth’s atmosphere is not evenly distributed and several observations can be explained on the basis of this phenomenon,name the phenomeoneon

What would have been the colour of sky if the earth had no atmosphere

Why is red used as the stopping light at traffic signals?

The defect the eye cannot focus objects both horizontally and vertically at the same time

Astigmatism can be corrected

The colour of the clear sky blue due to

The sky appears black to an astronaut as there is no

The refractive index of glass is largest for