English Medium इयत्ता १० - CBSE Question Bank Solutions

Compute the heat generated while transferring 96000 coulombs of charge in two hours through a potential difference of 40 V.

The laws of reflection hold true for ______.

Assertion (A): In a homologous series of alcohols, the formula for the second member is C₂H₅OH and the third member is C₃H₇OH.
Reason (R): The difference between the molecular masses of the two consecutive members of a homologous series is 144.

Write two devices based on the heating effect of electric current.

In a closed circulatory system, blood is completely enclosed within:

You are given water, mustard oil, glycerine and kerosene. In which of these media a ray of light incident obliquely at same angle would bend the most?

The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.

The angle of incidence for a ray of light having zero reflection angle is ______.

Which of the following does not belong to the same homologous series?

Successive members of a homologous series vary by how many atomic mass unit?

C₃H₈ belongs to the homologous series of ______.

An electric iron draws a current of 4 A when connected to 220 V mains. Its resistance must be:

A fuse wire repeatedly gets burnt when used with a good heater. It is advised to use a fuse wire of:

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 heating element of an electric iron is made up of:

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

Which of the following gases are filled in electric bulbs?

Assertion: Bending of wire decreases the resistance of the electric wire.

Reason: The resistance of a conductor depends on length, thickness, nature of material and temperature of the conductor.

If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct?

The angle of incidence from air to glass at the point O on the hemispherical glass slab is.