(b) As the electric current is flowing horizontally in east to west direction. Applying right hand thumb rule, we find that (i) the direction of magnetic field at a point directly below the wire is from north to south. (ii) the direction of magnetic field at a point directly above the wire is from sRead more
(b) As the electric current is flowing horizontally in east to west direction. Applying right hand thumb rule, we find that
(i) the direction of magnetic field at a point directly below the wire is from north to south.
(ii) the direction of magnetic field at a point directly above the wire is from south to north.
(a) Distinguishing features between an alternating current and a direct current: Direct Current (D.C.):- 1. Direct current always flows in one direction only. 2. The magnitude of current may or may not remain constant. 3. Current obtained from a battery and D.C. generator is D.C. Alternating CurrentRead more
(a) Distinguishing features between an alternating current and a direct current:
Direct Current (D.C.):-
1. Direct current always flows in one direction only.
2. The magnitude of current may or may not remain constant.
3. Current obtained from a battery and D.C. generator is D.C.
Alternating Current (A.C.)
1. Alternating current reverses its direction periodically.
2. Magnitude of current continuously changes with time.
3. Current obtained from an A.C. generator and current in our domestic circuit are A.C
(a) Tropism or tropic movements are directional growth movements in which the direction of movement is determined by the direction of stimulus. Geotropism, phototropism, hydrotropism, chemotropism are different types of tropic movements. (b) Tropism: - (1) It is a growth dependent process that is deRead more
(a) Tropism or tropic movements are directional growth movements in which the
direction of movement is determined by the direction of stimulus. Geotropism, phototropism,
hydrotropism, chemotropism are different types of tropic movements.
(b) Tropism: – (1) It is a growth dependent process that is determined by the direction of stimulus.
(2) It is directional in nature.
(3) Such movements exhibit a slow response towards any stimulus.
Nastic Moaement:-
(1) It is a growth independent process.
(2) It is non-directional in nature.
(3) Such movements exhibit an immediate response towards a stimulus.
Energy obtained by burning fossil fuels:- (i) The energy obtained is of high intensity and is obtained only in a limited surface area for a limited time (ii) Energy obtained by burning fossil fuels is exhaustible. (iii) Fossil fuels are non-renewable. (iv) During burning of fossil fuels lot of smokeRead more
Energy obtained by burning fossil fuels:-
(i) The energy obtained is of high intensity and is obtained only in a limited surface area for a limited time
(ii) Energy obtained by burning fossil fuels is exhaustible.
(iii) Fossil fuels are non-renewable.
(iv) During burning of fossil fuels lot of smoke is produced and various gases are
produced due to which air pollution is caused.
Solar energy:-
(i) Solar energy is diffused in nature. But it is received everywhere on earth at all times.
(ii) Solar energy is non-exhaustible.
(iii) Solar energy is renewable.
(iv) Solar energy causes no pollution of any sort.
After performing the reaction between dil. HCI and sodium carbonate, a student noted the properties of carbon dioxide. Correct observation would be that carbon dioxide is :
(d) Carbon dioxide has the property of extinguisiling fire.
(d) Carbon dioxide has the property of extinguisiling fire.
See less(a) Write three distinguishing features between an alternating current and a direct current. (b) A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? Name the rule you have applied in this case.
(b) As the electric current is flowing horizontally in east to west direction. Applying right hand thumb rule, we find that (i) the direction of magnetic field at a point directly below the wire is from north to south. (ii) the direction of magnetic field at a point directly above the wire is from sRead more
(b) As the electric current is flowing horizontally in east to west direction. Applying right hand thumb rule, we find that
See less(i) the direction of magnetic field at a point directly below the wire is from north to south.
(ii) the direction of magnetic field at a point directly above the wire is from south to north.
(a) Write three distinguishing features between an alternating current and a direct current. (b) A current through a horizontal power line flows in east to west direction. What is the direction of magnetic field at a point directly below it and at a point directly above it? Name the rule you have applied in this case.
(a) Distinguishing features between an alternating current and a direct current: Direct Current (D.C.):- 1. Direct current always flows in one direction only. 2. The magnitude of current may or may not remain constant. 3. Current obtained from a battery and D.C. generator is D.C. Alternating CurrentRead more
(a) Distinguishing features between an alternating current and a direct current:
See lessDirect Current (D.C.):-
1. Direct current always flows in one direction only.
2. The magnitude of current may or may not remain constant.
3. Current obtained from a battery and D.C. generator is D.C.
Alternating Current (A.C.)
1. Alternating current reverses its direction periodically.
2. Magnitude of current continuously changes with time.
3. Current obtained from an A.C. generator and current in our domestic circuit are A.C
(a) What is tropism? (b) Mention the differences between tropism and nastic movement in tabulated form.
(a) Tropism or tropic movements are directional growth movements in which the direction of movement is determined by the direction of stimulus. Geotropism, phototropism, hydrotropism, chemotropism are different types of tropic movements. (b) Tropism: - (1) It is a growth dependent process that is deRead more
(a) Tropism or tropic movements are directional growth movements in which the
See lessdirection of movement is determined by the direction of stimulus. Geotropism, phototropism,
hydrotropism, chemotropism are different types of tropic movements.
(b) Tropism: – (1) It is a growth dependent process that is determined by the direction of stimulus.
(2) It is directional in nature.
(3) Such movements exhibit a slow response towards any stimulus.
Nastic Moaement:-
(1) It is a growth independent process.
(2) It is non-directional in nature.
(3) Such movements exhibit an immediate response towards a stimulus.
Differentiate between energy obtained by burning fossil fuels and that obtained as solar energy.
Energy obtained by burning fossil fuels:- (i) The energy obtained is of high intensity and is obtained only in a limited surface area for a limited time (ii) Energy obtained by burning fossil fuels is exhaustible. (iii) Fossil fuels are non-renewable. (iv) During burning of fossil fuels lot of smokeRead more
Energy obtained by burning fossil fuels:-
See less(i) The energy obtained is of high intensity and is obtained only in a limited surface area for a limited time
(ii) Energy obtained by burning fossil fuels is exhaustible.
(iii) Fossil fuels are non-renewable.
(iv) During burning of fossil fuels lot of smoke is produced and various gases are
produced due to which air pollution is caused.
Solar energy:-
(i) Solar energy is diffused in nature. But it is received everywhere on earth at all times.
(ii) Solar energy is non-exhaustible.
(iii) Solar energy is renewable.
(iv) Solar energy causes no pollution of any sort.