Physics-
General
Easy
Question
The turn ratio of a transformers is given as 2:3. If the current through the primary coil is 
, thus calculate the current through load resistance
The correct answer is:
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In transformer, core is made of soft iron to reduce
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When the current through a solenoid increases at a constant rate, the induced current
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An electric motor operates on a 
supply and a current of 
. If the efficiency of the motor is 30%, what is the resistance of the winding of the motor
An electric motor operates on a supply and a current of . If the efficiency of the motor is 30%, what is the resistance of the winding of the motor
Physics-General
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A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate 
at 
under these conditions. The voltage and current in the primary is
A loss free transformer has 500 turns on its primary winding and 2500 in secondary. The meters of the secondary indicate at under these conditions. The voltage and current in the primary is
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An aeroplane in which the distance between the tips of the wings in 50 m is flying horizontally with a speed of 360 
over a place where the vertical component of earth’s magnetic field is 
. The potential difference between the tips of the wings would be
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Physics-General
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The primary winding of transformer has 500 turns whereas its secondary has 5000 turns. The primary is connected to an ac supply of 
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Physics-General
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According to Faraday’s law of electromagnetic induction
According to Faraday’s law of electromagnetic induction
Physics-General
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A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad
. If the horizontal component of earth’s magnetic field is 
then the emf developed between the two ends of the conductor is
A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad. If the horizontal component of earth’s magnetic field is then the emf developed between the two ends of the conductor is
Physics-General
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Let 
be an equivalence relation on a finite set 
having 
elements. Then, the number of ordered pairs in is
Let be an equivalence relation on a finite set having elements. Then, the number of ordered pairs in is
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General
In a first order reaction the 𝑎/(𝑎−𝑥) was found to be 8 after 10 minute. The rate constant is:
In a first order reaction the 𝑎/(𝑎−𝑥) was found to be 8 after 10 minute. The rate constant is:
GeneralGeneral
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Let be the set of all students in a school. A relation is defined on as follows:
iff 
and 
have the same teacher”
Let be the set of all students in a school. A relation is defined on as follows:
iff and have the same teacher”
Maths-General
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Let and 
be two equivalence relations on a set 
Then,
Let and be two equivalence relations on a set Then,
Maths-General
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Let be a fixed positive integer. Define a relation on the set 
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Let be a fixed positive integer. Define a relation on the set of integers by, Then, is not
Maths-General
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The value of 
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The value of is
Maths-General
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If 
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If then the number of elements in the set is
Maths-General
