What Will Be The Nature Of Electric Potential At A Place Where Electric Field Is Zero
The electric field is expressed as the negative gradient of the potential. If the electric field at a point is... View Article
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What Is The Definition Of Electric Field
The electric field is a physical field that surrounds an electric charge and it exerts a force on every other... View Article
Does Frequency Affect Wave Speed
As the frequency increases, wavelength decreases but the speed remains a constant. Therefore, the frequency of the wave does not... View Article
What Does Capacitor Do In A Circuit
Capacitors store energy in the form of electrostatic fields between the plates. Capacitors are widely used in circuits to block... View Article
How Do Capacitors Increase Voltage
Capacitors are used to store charges and capacitors alone cannot increase the voltage. Capacitors are connected along with diodes to... View Article
What Affects Natural Frequency
Natural frequency is the frequency at which an object vibrates when it is disturbed by hitting, plucking etc. There are... View Article
Can You Demagnetize A Neodymium Magnet
Neodymium magnets can be demagnetised by heating it above the curie temperature, which is above 350 0C. It can also... View Article
Is Gold A Magnetic Material
All magnetic materials are metals but not all the metals are magnetic. Gold is not a magnetic material. Iron is... View Article
Can A Magnet Repel Ferromagnetic Material
Magnets are always attracted to ferromagnetic substances like iron, cobalt, nickel and the alloys containing them (example: steel). Ferromagnetic materials... View Article
If M1m2m3m4 Are Respectively The Magnitudes Of The Vectors Then The Correct Order
1) m3 < m1 < m4 < m2 2) m3 < m1 < m2 < m4 3) m3 < m4... View Article
In A Quadrilateral Abcd The Point P Divides Dc In The Ratio 12 And Q Is The Midpoint Of Ac
1) –6 2) –4 3) 6 4) 4 Answer: (1) -6 Solution: Given, ABCD is a quadrilateral. AB+2AD+BC−2DC=kPQ (Given) Taking... View Article
If A 2 1 1 B 1 1 0 C 5 1 1 Then Unit Vector Parallel To A B C But In Opposite Direction Is
1) ⅓(2i-j+2k) 2) ½(2i-j+2k) 3) ⅓(2i-j-2k) 4) None of these Answer: (1) ⅓(2i-j+2k) Solution: a+b-c = =i(2+1−5)+j(1−1+1)+k(−1+0−1) =−2i+j−2k Unit vector... View Article
If A Ijk Bij2k And Cxix2jk And If The Vector C Lies In The Plane Of Vectors A And Ab Then X Is Equal To
1) 0 2) 1 3) –2 4) 2 Answer: (3) -2 Solution: Given, a = i+j+k, b=i-j+2k and c=xi+(x-2)j-k [... View Article
Let A B And C Be Three Non Zero Vectors Such That No Two Of These Are Collinear If The Vector
1) λ a (λ ≠ 0, a scalar ) 2) λ b (λ ≠ 0, a scalar ) 3) λ... View Article
If C Is The Mid Point Of Ab And P Is Any Point Outside Ab Then
1) PA + PB = PC 2) PA + PB + 2PC = 0 3) PA + PB – 2PC... View Article
If 2a 3b 5c 0 Then The Ration In Which C Divides Ab Is
1) 3 : 2 internally 2) 3 : 2 externally 3) 2 : 3 internally 4) 2 : 3 externally... View Article
If A B C Are Position Vectors Of Threecollinear Points Such That Xaybzc0 And Atleast One Scalar Xyz
1) x+y+z =0 2) x+y+z ≠ 0 3) No relation between x,y and z 4) None of the above Answer:... View Article
Abcdef Is A Regular Hexagon With Centre At The Origin Such That Ad Eb Fc
1) 2 2) 4 3) 6 4) 3 Answer: (2) 4 Solution: AD =2 OD , EB =2 EO As,... View Article
If S Is Circumcentre G Is The Centroid O Is The Orthocentre Of Abc Then Sa Sb Sc Is Equal To
1) SG 2) OS 3) SO 4) OG Answer: (3) SO Solution: Given, S is circumcentre, G is the centroid,... View Article
Write Down A Unit Vector In Xyplane Making An Angle Of 30 With The Positive Direction Of Xaxis
(1) √3/2i+1/2j (2) i+j (3) i (4) j Answer: (1) √3/2i+1/2j Solution: If r is the unit vector, then r... View Article
