DSSSB Junior Engineer Electrical Solved Papers

Consider a body of mass 10 kg is moving under a force, the relation between time and displacement is given as $x = t^2 / 4$, where x is expressed in metres and t is in seconds. What is the work done in the first 2 seconds?

In a geometric progression, the sum of the first and last terms is 64 and the product of the second and the last but one term is 124. The first term of the series is:

Let AC and BD be two chords in a circle with centre O such that AB and CD intersect at a point. If $\angle BAC : \angle ABC = 2 : 4$, then $\angle BAC = ?$

If A, B and C are skew-symmetric matrices of the same order, then ABC + CBA is a/an:

Consider an equilateral triangle of side L. The centre of gravity of the triangle measured on a median from any side lies at a height:

The value of the integral $\int e^x \left(\frac{2 + \sin 2x}{1 + \cos 2x}\right) dx$ is (C is arbitrary constant):

In a hydrogen atom, transition takes place from $n = 3$ to $n = 2$ orbit. The wavelength of the emitted radiation lies in the:

Match the Gaseous Fuels with their Calorific Values.

What does the given formula represent?

$$\frac{\text{Weight of solute}}{\text{Equivalent weight of solute} \times \text{Volume of the solution (in L)}}$$

The solution of $y + (x - \cos y)\frac{dy}{dx} = 0\text{ (zero)}$ is (C is arbitrary constant):

The magnitude of the magnetic force on a wire of length 6 m carrying a current of 8 A and making an angle of $45^{\circ}$ with the direction of a uniform magnetic field of 0.25 T is:

If the torque acting on a rigid body is 0 (zero), then the angular momentum of the rigid body:

Select the option that is correct regarding the following two statements labelled Assertion (A) and Reason (R).

Assertion (A): Sheets of Zinc protect ship hull from corrosion.
Reason (R): Zinc being less active than ship's metal is used as sacrificial anode.

The value of the limit $\lim_{x \to 0} \frac{\sin 3x - 3\sin x}{x^3}$ is:

A water sample contains $25\text{ mg/L }\text{CaSO}_4$, $15\text{ mg/L }\text{CaCl}_2$, and $10\text{ mg/L }\text{Ca(HCO}_3)_2$. The temporary and permanent hardness for the water under analysis, respectively, are:

Rambabu is moving down a block of mass $M$ on a rough inclined plane of angle of inclination $\delta$ and the coefficient of friction of the plane varies with distance $x$ as $\mu(x) = \beta x^{0.5}$ where $\beta$ is constant. Here $x$ is the distance moved by the body down the plane. The net acceleration on the body is $g\cos\delta$ at $x = L$. Then the value of constant $\beta$ is:

If two charges of 1 C are placed at a distance of 10 m in the free space, then the electrostatic force between them is:

The value of $i^i$ is:

In a p-n junction semiconductor diode, one experiences increased barrier height and a wide depletion region:

A golfer hits a golf ball of mass 40.0 g and it moves with a speed of 20.0 m/s. If the golf stick is in contact with the ball for 2 s, then the force applied by the golf stick on the ball is:

The combinational logic circuit shown in the above figure performs logic implementation of the:

Which of the following is NOT one of the applications of a cycloconverter?

Consider the cutting plane line shown in the figure below:

What should be the length 'X' shown by the thick cutting plane line in the above figure?

Which of the following systems provides less voltage fluctuations at consumer's terminal?

Which of the following statements is true?