Physics-
General
Easy
Question
In a step-up transformer the voltage in the primary is 
and the current is 
. The secondary voltage is found to be 
. The current in the secondary (neglect losses) is
The correct answer is:
Related Questions to study
Physics-
A coil having an inductance of 
carries a current which is uniformly varying from zero to 10 ampere in 2 second. The e.m.f. (in volts) generated in the coil is
A coil having an inductance of carries a current which is uniformly varying from zero to 10 ampere in 2 second. The e.m.f. (in volts) generated in the coil is
Physics-General
Physics-
An air core solenoid has 1000 turns and is one 
long. Its cross-sectional area is 
. Its self inductance is
An air core solenoid has 1000 turns and is one long. Its cross-sectional area is . Its self inductance is
Physics-General
Physics-
A rectangular loop of length l and breadth b is placed at distance of 
from infinitely long wire carrying current i such that the direction of current is parallel to breadth. If the loop moves away from the current wire in a direction perpendicular to it with a velocity 
the magnitude of the emf in the loop is 
permeability of free space)
A rectangular loop of length l and breadth b is placed at distance of from infinitely long wire carrying current i such that the direction of current is parallel to breadth. If the loop moves away from the current wire in a direction perpendicular to it with a velocity the magnitude of the emf in the loop is permeability of free space)
Physics-General
Physics-
A long horizontal metallic rod with length along the east-west direction is falling under gravity. The potential difference between its two ends will
A long horizontal metallic rod with length along the east-west direction is falling under gravity. The potential difference between its two ends will
Physics-General
General
If a spherical conductor comes out from the closed surface of the sphere then total flux emitted from the surface will be
If a spherical conductor comes out from the closed surface of the sphere then total flux emitted from the surface will be
GeneralGeneral
Chemistry-
ion produces common ion effect in the wet analysis of:
ion produces common ion effect in the wet analysis of:
Chemistry-General
Chemistry-
The self ionisation constant for pure formic acid, 
has been estimated as 
at 
The percentage of formic acid molecules in pure formic acid converted to formate ion is:
The self ionisation constant for pure formic acid, has been estimated as at The percentage of formic acid molecules in pure formic acid converted to formate ion is:
Chemistry-General
Chemistry-
Glycine is:
Glycine is:
Chemistry-General
Chemistry-
The equilibrium reaction that is not influenced by volume change at constant temperature is
The equilibrium reaction that is not influenced by volume change at constant temperature is
Chemistry-General
Chemistry-
The solubility product of iron (III) hydroxide is 
. If 
is the solubility of iron (III) hydroxide, which one of the following expression can be used to calculate ?
The solubility product of iron (III) hydroxide is . If is the solubility of iron (III) hydroxide, which one of the following expression can be used to calculate ?
Chemistry-General
Chemistry-
For the reaction, 
, the value of 
at 
is 26. The value of 
at this temperature will be
For the reaction, , the value of at is 26. The value of at this temperature will be
Chemistry-General
Chemistry-
The hydroxide with highest solubility product is:
The hydroxide with highest solubility product is:
Chemistry-General
Chemistry-
Which of the following will have maximum pH?
Which of the following will have maximum pH?
Chemistry-General
Chemistry-
In 1L saturated solution of 
, 0.1 mole of 
is added. The resultant concentration of Ag in the solution is 
. The value of 
is
In 1L saturated solution of , 0.1 mole of is added. The resultant concentration of Ag in the solution is . The value of is
Chemistry-General
Chemistry-
The pH indicators are
The pH indicators are
Chemistry-General
