Maths-
General
Easy
Question
If angle between and is obtuse, then
- >
-
- > 1
- None of these
The correct answer is: >
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Maths-
The position vectors of P and Q are respectively and . If R is a point on such that = 5 , then the position vector of R is
The position vectors of P and Q are respectively and . If R is a point on such that = 5 , then the position vector of R is
Maths-General
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A small piece of metal wire is dragged across the gap between the poles of a magnet in 0.4 s. If change in magnetic flux in the wire is Wb, then emf induced in the wire is
A small piece of metal wire is dragged across the gap between the poles of a magnet in 0.4 s. If change in magnetic flux in the wire is Wb, then emf induced in the wire is
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A coil of wire of a certain radius has 600 turns and a self inductanceof . The self inductance of a 2nd similar coil of 500 turns will be
A coil of wire of a certain radius has 600 turns and a self inductanceof . The self inductance of a 2nd similar coil of 500 turns will be
Physics-General
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If a current of flows in one second through a coil, and the induced e.m.f. is , then the self-inductance of the coil is
If a current of flows in one second through a coil, and the induced e.m.f. is , then the self-inductance of the coil is
Physics-General
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A transformer of efficiency 90% draws an input power of 4 kW. An electrical appliance connected across the secondary draws a current of 6 A. The impedance of the device is
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General
If and then x
If and then x
GeneralGeneral
Maths-
Let a, b, c be distinct non-negative numbers. If the vectors ai + aj + ck, i + k and ci + cj + bk lie in a plane, then c is -
Let a, b, c be distinct non-negative numbers. If the vectors ai + aj + ck, i + k and ci + cj + bk lie in a plane, then c is -
Maths-General
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Let a, b and c be three non-coplanar vectors, and let p, q and r be the vectors defined by the relations p = . q = and r = Then the value of the expression (a + b).p + (c + a).r is equal to -
Let a, b and c be three non-coplanar vectors, and let p, q and r be the vectors defined by the relations p = . q = and r = Then the value of the expression (a + b).p + (c + a).r is equal to -
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The vectors c, directed along the internal bisector of the angle between the vectors a = 7i – 4j – 4k and b = – 2i – j + 2k , with |c| = 5 is -
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Maths-General
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Volume of tetrahedron whose vertices one A (3, 7, 4) B (5, – 2, 3) C (–4, 5, 6) and D (1, 2, 3) are -
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Maths-General
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PQRSTU is Regular hexagon. Then + + + =
PQRSTU is Regular hexagon. Then + + + =
Maths-General
Maths-
I): If AD, BE, CF are the medians of a ABC, then + + = ,II): If G is the Centroid of the ABC, then + + = ,Which of the above statements is correct ?
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Maths-General
Maths-
I : If[] = 2, then the volume of the Parallelopiped whose coterminous edges are , and is 18 cubic units.,II : If + + , + + are coplanar Vectors then the value of 'a' is .,Which of the above statements is correct ?
I : If[] = 2, then the volume of the Parallelopiped whose coterminous edges are , and is 18 cubic units.,II : If + + , + + are coplanar Vectors then the value of 'a' is .,Which of the above statements is correct ?
Maths-General
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I : If , , are three mutually perpendicular Unit Vectors then | + + | = 3.,II. If the sum of two Unit Vectors is a Unit Vectors then | – | = .,Which of the above statements is correct ?
I : If , , are three mutually perpendicular Unit Vectors then | + + | = 3.,II. If the sum of two Unit Vectors is a Unit Vectors then | – | = .,Which of the above statements is correct ?
Maths-General
Maths-
× + × + × ( × ) =
× + × + × ( × ) =
Maths-General