(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Physics

Two resistors of resistance 4 Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.

Draw a labeled diagram of the arrangement

Two resistors of resistance 4 Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.

Calculate current in each resistor. 

A particular resistance wire has a resistance of 3 ohm per meter. Find the potential difference of the battery which gives a current of 2 A in each of the 1.5 m length when connected in the parallel to the battery (assume that resistance of the battery is negligible).

A particular resistance wire has a resistance of 3 ohm per meter. Find :

The total resistance of three lengths of this wire each 1.5 m long, in parallel.

An electrical appliance has a rating 100 W, 120V. The resistance of element of appliance when in use:

A current of 2 A is passed through a coil of resistance 75 Ω for 2 minutes.
(a) How much heat energy is produced?
(b) How much charge is passed through the resistance?

An electrical appliance having a resistance of 200 Ω is operated at 200 V. Calculate the energy consumed by the appliance in 5 minutes in kWh.

An a.c. generator changes the ______energy to ______ energy. 

State two safety measures to be taken while establishing a nuclear power plant.

What is meant by nuclear waste? 

Name the principle on the basis of which optical fibres work.

How does a ray of light bend when it travels from rarer to denser medium

How does a ray of light bend when it travels from denser to rarer medium.

How does a ray of light bend when it travels from when it is normal to the interface of the two media.

Why do diamonds sparkle?

Can light be ‘piped’ like sound in a doctor’s stethoscope?

Write down the relationship between the critical angle and the refractive index of the medium.

Express the refractive index μ of a medium in terms of the angle of incidence i in air and the angle of refraction r in a denser medium.

If a ray of light passes from medium I to medium II without any change of direction, what can be said about the refractive indices of these media (angle I is not 0)?

How are critical angles related to the refractive index of the medium?