Explore topic-wise InterviewSolutions in Current Affairs.

Solve the following:

(1) Complete the following

(a)

(b)

(2) Find the total resistance in the circuit.

(3) Find the total resistance and current in the circuit.

(4) If two resistors are connected in series, the total resistance is 45Ω and if the same resistors are connected in parallel the total resistance becomes 10Ω. Find the value of individual resistors.

(5) If a bulb of 60W is connected across a source of 220 V, find the current drawn by it.

(6) A potential difference of 250 Volts is applied across a resistance 1000 Ω in an electric iron. Find (1) the current and (2) heat energy produced in Joules in 12 sec.

(7) A washing machine rated 300W is operated for one hour/day. If the cost of unit is Rs 3.00 find the cost of the energy to operate a washing machine for the month of March.

(8) If a TV of rating 100W is operated for 6 hrs per day, find the number of units consumed in any leap year.

(9) How will you connect three resistances of 4 ohms each to get 12 Ω, 6 Ω and Ω, respectively.

The potential energy between the atoms in a molecule is given by

$U\left(x\right)=\frac{a}{x^{12}}-\frac{b}{x^6}$



Where $a$ and $b$ are positive constants, and $x$ is the distance between the atoms. The atoms will be in equilibrium when,

The center of gravity can be located___

Choose the correct electronic distribution of carbon?

From the diagram given below, what effort has to be applied at C to just raise the Load L = 20 Kg?
(Neglect the weight of pulley A and friction)

Kepler’s third law states that square of period of revolution (T) of a planet around the sun, is proportional to third power of average distance r between sun and planet i.e. $T^2=K{r}^3$ where K is constant.If the masses of sun and planet are M and m respectively then as per Newton’s law of gravitation force of attraction between them is $F=\frac{GMm}{r^2}$ , here G is gravitational constant

The relation between G and K is described as:

How much current will an electric geyser draw from a 220 V source, if the resistance of the geyser is 110 ohm?

A wire ABCDEF (with each side of length L) bent as shown in Fig. and carrying a current I is placed in a uniform magnetic field B parallel to the positive y - direction. What is the magnitude and direction of the force experienced by the wire?

Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of the angle of incidence

Question 9

One-half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations.

Dimensional formula for electromotive force is same as that for

A) potential

B) current

C)force

D) energy

Two electric dipoles, $A$ and $B$ with respective dipole moments ${\overrightarrow{p}}_A=-4qa\hat{i}$ and ${\overrightarrow{p}}_B=-2qa\hat{i}$ are placed on the $X-$ axis with a separation $R$, as shown in the figure





The distance from $A$ at which both of them produce the same potential is

What is the range of wavelength of the spectrum of white light in (i) $\stackrel{\circ }{A}$ (ii) nm ?

An ideal coil of $10\text{H}$ is connected in series with a resistance of $5\Omega$ and a battery of $5\text{V}.2\text{sec}$ after the connection is made, the current flowing (in ampere) in the circuit is

Common Data:

Consider a steam power plant using a reheat cycle as shown. Steam leaves the boiler and enters the turbine at $4MPa,{350}^{o}C(h_3=3095kJ/kg)$. After expansion in the turbine to $400kPa(h_4=2609kJ/kg$, the steam is reheated to ${350}^{o}C(h_5=3170kJ/kG)$, and then expanded in a low pressure turbine to $10kPa(h_6=2165kJ.kg)$ the specific volume of liquid handle by the pump can be assumed to be







The enthalpy at the pump discharge $\left(h_2\right)$ is

1. 344.43

Why is a loud sound heard at resonance ?

The angle of a prism is ${60}^{\circ }$. When light is incident at an angle of ${60}^{\circ }$ on the prism, the angle of emergence is ${40}^{\circ }$. The angle of incidence i for which the light ray will deviate the least is such that

A plane electromagnetic wave has an intensity of $6\frac{\text{W}}{{\text{m}}^2}$ strikes a small pocket mirror which has an area $40{\text{cm}}^2$ held perpendicular to the approaching wave. Then, what momentum does the wave transfer to the mirror each second?

Statement 1: EMF of a battery can never be equal to potential difference across its terminals.
Statement 2: EMF and Potential Difference of a battery are completely independent.

When we place a glass prism in the path of a narrow beam of white light a spectrum is obtained. What happens when a second identical prism is placed in an inverted position with respect to the first prism? Draw a labeled ray diagram to illustrate it.

Is the direction of deflection of a galvanometer the same as the direction of current?

For the circuit shown in the following diagram what is the value of

(i) Current through 6 $\Omega$ resistor

(ii) Potential difference across 12$\Omega$

For a solenoid which is connected to an elctric supply, N and S poles are created at the two ends. Among the following statements, the correct statement/statements is/are:

With the help of a labelled ray diagram, describe how a converging mirror can be used to give an enlarged upright image of an object.

Fill in the blanks:-

The nucleus of a _______ atom (such as uranium, plutonium or thorium),

when bombarded with__________ neutrons, can be split apart into lighter

nuclei.

Consider the figure shown. The reflected ray is perpendicular to the incident ray then the angle of incidence for the ray is

The direction of rotation of a DC motor, as shown below, is in the clockwise direction.
The direction of magnetic field is ___.