CBSE Class X – Science Physics Exam (Full Syllabus)

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:

Which of the subsequent is not attracted by a magnet:

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:

When current is parallel to magnetic field, then force experience by the current carrying conductor placed in uniform magnetic field is

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

Example of permanent magnet is

The phenomenon discovered by Faraday.

The law states that if the forefinger indicates the direction of the magnetic field and thumb shows the direction of motion of conductor, then the middle finger will show the direction of induced current

A boy records that 4000 joule of work is required to transfer 10 coulomb of charge between two points of a resistor of 50 Ω. The current passing through it is:

A student drives out an experiment and plots the V-I graph of three samples of nichrome wire with resistances R1 R2 and R3 respectively. Which of the following is huge?

The resistivity does not change if:

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

The commercial unit of electric energy is

Copper is not approved to make fuse wire because it:

The property of a conductor to oppose the flow of charges through it.

When a 4 V battery is connected across an unknown resistor there is a current of 100 mA in the circuit. The value of the resistance of the resister is

The device used to measure the internal resistance of a cell, to compare the e.m.f. of two cells and potential diference across a resistor

In an experiment to trace the path of a ray of light through a triangular glass prism, a student would observe that the emergent ray

A student traces the path of a ray of light through a triangular glass prism for diferent values of angle of incidence. On analysing the ray diagrams, which one of the following conclusions is he likely to draw?

The sky appears black to an astronaut

The density of the atmosphere, as we know goes on decreasing as the distance above the sea level increases,this phenomeneon is called

The defect in a person can see nearby objects but not far away objects

When a person can see faraway objects but not nearby objects.

Astigmatism can be corrected

The SI unit of Power of a lens is