CBSE Class X – Science Physics Exam (Full Syllabus)

Inside the magnet, the field lines move from :

Commercial electric motors neglect :

By which instrument, the presence of magnetic field be resolved?

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

Example of permanent magnet is

To determine the direction of force experienced by a current carrying conductor placed in a uniform magnetic feld.

Two magnetic feld lines never intersect because the resultant force on a north pole at any point can only be in

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

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:

True test of charge is

One horsepower (hp) is parallel to

Copper is not approved to make fuse wire because it:

The ammeter is always connected in series because

S.I unit of resistivity

Joule’s law of heating implies that heat produced in a resistor is directly proportional to the square of

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 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

Which of the following statements is correct regarding the propagation of light of diferent colours of white light in air?

Which of the following phenomena contributes signifcantly to the reddish appearance of the sun at sunrise or sunset?

Arjun 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 ,Name two observations which can be explained by the above phenomenon.

Why don’t planets twinkle?

When sunlight passes through a canopy of a dense forest, tiny water droplets in the water scatter light.This is an example of

Rainbow is caused due to

The colour of scattered light depends on the

The sky appears black to an astronaut as there is no