Show by a diagram, the refraction of two light rays incident parallel to the principal axis on a concave lens by treating it as a combination of a glass block and two triangular glass prisms.
[5] Refraction Through a Lens
Chapter: [5] Refraction Through a Lens
Concept: undefined >> undefined
Write S.I. unit of temperature.
[11] Calorimetry
Chapter: [11] Calorimetry
Concept: undefined >> undefined
Give scientific reason for the following:
A man runs in the direction of train while getting down from a moving train.
[1] Force
Chapter: [1] Force
Concept: undefined >> undefined
Fig shows a thin beam of white light from a source S striking on one face of a prism.
- Complete the diagram to show the effect of the prism on the beam and to show what is seen on the screen.
- If a slit is placed in between the prism and the screen to pass only the light of green colour, what will you then observe on the screen?
- What conclusion do you draw from the observation in part (b) above?
[6] Spectrum
Chapter: [6] Spectrum
Concept: undefined >> undefined
What do you mean by conductance of a conductor of a solution?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
State the law which relates the current in a conductor to the potential difference across its ends.
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
What happens to the resistance if the conductor is made thinner?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
What kind of plot would you except when current (I) is plotted against potential difference (V) for a conductor, at constant temperature?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
Give two uses of conductors.
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
Is electric potential a scalar or a vector physical quantity?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
Define electric intensity. Write its SI unit. Is it a scalar or a vector physical quantity?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
By what name is the unit joule/coulomb called?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
The work done in moving unit positive charge across two points in an electric circuit is a measure of
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
What are the conditions under which charges can move in a conductor?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
What do you mean by electric current?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
What is the direction of electric current?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
Name the physical quantity which defines the rate of flow of charge.
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
Name the physical quantity which is measured by an ammeter.
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
How many electrons are present in 1 C?
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
A battery of e.m.f. 15 V and internal resistance 3 ohm is connected to two resistors of resistance 3 ohm and 6 ohm in series. Find:
(i) The current through the battery,
(ii) The p.d. between the terminals of the battery.
[8] Current Electricity
Chapter: [8] Current Electricity
Concept: undefined >> undefined
