RRB ALP Previous Year Paper 2013 - RRB Group D / RPF Constable MCQ

CH₃—CH₃ (Ethane) is example of open chain compound.

Ammonia is a compound of Nitrogen and hydrogen with the formula NH3. Ammonia is a colourless gas. It is lighter than air and highly soluble in water. At 10°C, 1300 parts of ammonia gets dissolved in one part of water.

It is obvious from the periodic table that the elements have diagonal relationship :

Electronic configuration of Mg is 1s² 2s² 2p⁶ 3s². Mg is an alkaline earth metal. Other alkaline earth metals are : Be, Ca, Sr, Ba, Ra.

Uranium is a member of actinide group 15 radioactive elements are the members of actinide group.

Saponification is a process of making soap. This process is completed in a certain steps and the final outcome is the soap.

Ethylene (C₂H₄) gas is used to ripen the fruits.

Let critical angle is ‘C’.
Formula : 

From Fleming’s Right Hand Rule, there is a definite relation among current or induced e.m.f. (electromotive force), lines of force and motion of the conductor.
Fleming’s Right Hand Rule—For a moving wire in a magnetic field, if the thumb, the first and second fingers of right hand are extended at right angles to one another, with the first finger representing the direction of magnetic lines of force and the second finger representing the direction of current flow induced by the wire’s motion, the thumb will be pointing in the direction of motion of the wire.

f = –50 cm, u = –25 cm, v = ?

where,   P = Power (in dioptre)
               f = focal length (in metre)
we have, f = 25 cm = 25/100 m = 1/4 m
             

Power = Voltage × Current
1 Watt = 1 Volt × 1 Amp.

Formula :

When V₁ and V₂ are in the same direction, then θ = 0

Hence, the value of V is the maximum and in direction of V₁ or V₂.

Dyne is the CGS unit of force

Moment of force = Force × side of the moment ⇒ τ = F × d Magnitude of the moment of force is the product of the force and the perpendicular distance from the axis to the line of action of the force. It is also called torque.

Moment of force and torque are the same

1 kilowatt-hour = 3·6 × 106 joules

Both the resistances are in parallel
Hence,         

A flow of electric charge is called electric current. Electric current is the result of motion of electrons or ions under the influence of e.m.f. It is measured in amperes.

Ohm’s law—This law states that the current flowing in an electric circuit is directly proportional to the voltage applied to the circuit. If i is the current flowing in a circuit and V is the voltage applied, then
or 

Let W is electrical power, then
W = I2·R·t = V·I·t