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The coefficient of friction of a surface is 1/√3. what should be the angle of inclination so that a body placed on the surface just begins to slide down?

The coefficient of friction is defined as the ratio of the force of friction acting between two objects and the force which is pushing them... View Article

If two interior angles on the same sides of a transversal intersecting two parallel lines are in the ratio 2 3 ,then the smaller of the two angles is

The angles which are formed inside the two parallel lines, when intersected by a transversal, are equal to its alternate pairs. These... View Article

An electron is travelling horizontally towards the east. A magnetic field in a vertically downward direction exerts a force on the electron along____ (a) East (b) West (c) North (d) South

The correct answer is (d) South The force experienced will be in the south direction. Fleming's left-hand rule is used to... View Article

A spring is kept compressed by a toy car of mass 150g. On releasing the car, it moves with a speed of 0.2ms−1. So, the elastic potential energy of the spring is

Given According to the given data m=150g=150×10−3kg v=0.2ms−1 Find out We have to determine the elastic... View Article

When a transversal intersects two parallel lines, the corresponding angles so formed will be ________

When a transversal intersects two parallel lines, the corresponding angles so formed will be equal Corresponding angles are the angles... View Article

Let a, b, c, d and p be any non zero distinct real numbers such that (a²+b²+c²)p²-2(ab+bc+cd)p +(b² +c²+d²) = 0. Then
1) a, c, p are in G.P. 2) a, b, c, d are in G.P. 3) a, b, c, d are in A.P. 4) a, c, p are in A.P.

The correct answer is 2) a, b, c, d are in G.P. Let us solve the given equation (a2+b2+c2)p2-2(ab+bc+cd)p +(b2 +c2+d2) = 0... View Article

Find the value of cos 360 degrees

Let us evaluate the cos 360 degrees value. As we know, cos 0° = 1 we can identify the value of cos 360° in unit circle as given... View Article

The HCF of 2472 and 1284 and a third number ‘n’ is 12. If their LCM is 2³×3²×5×103×107. Find the number ‘n’.

Answer: The Least Common Multiple (LCM) is a way of finding the smallest common multiple between any two numbers or more. A common multiple is a... View Article

Flux;ϕ(in webers) in a closed circuit of resistance 10 ohm varies with time t (in seconds) according to the equation ϕ=6t²−5t+1. What is the magnitude of the induced current in 0.25 seconds

Magnetic flux is defined as the number of magnetic field lines passing through a given closed surface. It provides the measurement of the total... View Article

An object is approaching a thin convex lens of focal length 0.3m with a speed of 0.01m/s.The magnitude of the rate of change of position of image when the object is at a distance of 0.4m from the lens is

A convex mirror is a type of spherical mirror in which the reflecting surface is the bulged out portion of the sphere, i.e. in this type of... View Article

The maximum area (in sq. units) of a rectangle having its base on the x-axis and its other two vertices on the parabola, y=12−x²such that the rectangle lies inside the parabola, is:-

Given According to the given data Equation of Parabola is y = 12 - x2 A rectangle has its base on the x-axis and its... View Article

A machine gun fires bullets of 50 gm at the speed of 1000 m/sec. If an average force of 200 N is exerted on the gun, the maximum number of bullets fired per minutes is

Given As per the given data, the details of the bullet are m=0.05 Kg v=1000m/s F=200N t = 1 second Find out We have to... View Article

A body weighs 72N on the surface of the earth. What will be the force of gravity acting on the body at a height equal to half the radius of the earth above the earth’s surface?

When a body of mass (m) is moved from infinity to a point inside the gravitational influence of a source mass (M) without accelerating it, the... View Article

A beam of helium atoms moves with a velocity of 2×10 ^4. Find the wavelength of particles constituting with the beam.

Given Velocity of helium atoms= 2×104m/s Find out We have to determine the wavelength of particles constituting the beam.... View Article

In what ratio does the point (- 4 , 6) divide the line segment joining the points a (- 6, 10) and b (3, – 8).

From the section formula Let the required ratio be m:nCoordinates of end points are (-6,10) and (3,-8).Coordinates of... View Article

A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved. the new value of the magnetic field is (a) B/2 (b) B (c) 2 B (d) 4 B

The correct answer is (c) 2 B A solenoid is a type of electromagnet whose intention is to produce a controlled magnetic field. If the purpose... View Article

The compound interest on Rs. 30,000 at 7% per annum is Rs. 4347. The period (in years) is:

Compound interest is the interest calculated on the principal and the interest accumulated over the previous period. The formula of compound... View Article

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle, the motion of the particle takes place on a plane. It follows that: (a) Its velocity is constant (b) It moves in a straight line (c) Its kinetic energy is constant (d) Its acceleration is constant

The correct answer is (c) It's kinetic energy is constant As per the given data,the particle is acted upon by a force of constant magnitude... View Article

From among the 36 teachers in a school, one principal and one vice-principal are to be appointed. in how many ways can this be done?

Permutation relates to the act of arranging all the members of a set into some sequence or order. The combination is a way of selecting... View Article

What is the moment of inertia of a rod of mass M, length l about an axis perpendicular to it through one end?

Moment of inertia is defined as the quantity expressed by the body resisting angular acceleration which is the sum of the product of the mass of... View Article

M	T	W	T	F	S	S
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3	4	5	6	7	8	9
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24	25	26	27	28	29	30
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