An electromagnetic wave propagating along north has its electric field vector upwards. Itsmagnetic field vector point towards 

(a) East 

(b) North 

(c) West 

(d) downwards

If  5p² – 7p – 3 = 0 and 5q² – 7q – 3 = 0,  p ≠ q , then the equation whose roots are 5p– 4q and 5q – 4p is :

(A)   5x² + x – 439 = 0

(B)   5x² + 7x – 439 = 0

(C)   5x² – 7x – 439 = 0

(D)   5x² + 7x + 439 = 0

If a mixture of FeO and Fe₃O₄ contains 75% Fe, what will be the percentage amount of each oxide in the mixture? 

(A) 64.10% FeO and 35.90% Fe₂O₃ 

(B) 50% FeO and 50% Fe₂O₃ 

(C) 75% FeO and 25% Fe₂O₃ 

(D) 35.90% FeO and 64.10% Fe₂O₃ 

Which of the following material is known as lunar caustic ? 

(A) NaNO₃ 

(B) AgCl 

(C) AgNO₃ 

(D) NaOH

Which of the following material is not ferromagnetic in nature ? 

(A) Al 

(B) Fe 

(C) Co 

(D) Ni

A very long solenoid is made out of a wire with n turns per unit length. The radius of the cylinder is a and is negligible compared to its length l. The interior of the cylinder is filled with materials such that the linear magnetic permeability varies with the distance r from axis according to

The self inductance of the solenoid is

(A) πn²l[μ₁b²+μ₂a²]

(B) πn²l[μ₁+μ₂]a²

(C) πn²l [μ₁b² +μ₂(a²-b²)]

(D)πn² [μ₁b²+(μ₁+μ₂)a²]

The front solid cylinder has mass M/3 while the back one solid cylinder has mass 2M/3.  The centers of these cylinders are connected by massless rod as shown. Both the cylinders have same radii R. The system is released from rest on the inclined plane. The cylinders roll down. The speed of the rod after system descending a vertical distance h is

TEL is a compound used as 

(a) antibiotic 

(b) antiseptic 

(c) antiknocking 

(d) antioxidant

A chord of the parabola y = x² – 2 + 5 = joins the point with the abscissas x₁ x 1 , x₂ =  3 Then the equation of the tangent to the parabola parallel to the chord is :

(A)   2x  – y + 5/4  = 0

(B)   2x – y + 2 = 0

(C)   2x – y + 1 = 0

(D)   2x + y + 1 = 0

The point of inflection of the function 

y = ∫(t² – 3t + 2)dt   x ∈[0,x] is :

(A)  (1/2, 3/2)

(B)  (3/2, 3/4)

(C)  (-3/2, -3/4)

(D)  (-1/2, – 3/2)