Jharkhand TGT (JSSC) Mock Test - 3 - Jharkhand (JSSC) PRT/TGT MCQ

As we know,

Given,

The value of is .

Let's first draw the diagram of the given information:

Given:

AB = 1 km, ∠ MAN = 30°, ∠ MBN = 75°

In Δ MAN, tan 30° =

⇒ MN = AM tan 30° ...(1)

And in Δ MBN, tan 75° =

⇒ MN = BM tan 75° ...(2)

Using (1) and (2), AM tan 30° = BM tan 75°

⇒

⇒

⇒

And, MN = BM tan 75°

⇒

⇒

⇒ km = 250 m.

We know that .

Let's say that and

and

The given expression can be written as:

The volume of cylinder The volume of the sphere

Let

and

LCM of

Given that the resistance remains the same,

Let us assume that initially, the resistance of wire be ,

If the length of wire is increased 4 times and the radius is increased times then,

It is given that resistance remains unchanged,

Radius becomes 2 times.

In a Wien-bridge oscillator, if the resistances in the positive feedback circuit are decreased, the frequency increases.

The Wien Bridge oscillator is a two-stage RC coupled amplifier circuit that has good stability at its resonant frequency, low distortion. The Wien Bridge Oscillator uses a feedback circuit consisting of a series RC circuit connected with a parallel RC of the same component values producing a phase delay or phase advance circuit depending upon the frequency. If if the resistances in the positive feedback circuit are decreased, the frequency increases.

Stefan-Boltzmann law is applicable for radiation it states that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. The law applies only to black bodies, theoretical surfaces that absorb all incident heat radiation.

Adiabatic process is the thermodynamics process in which no heat flows between the system and surrounding.

The adiabatic process comes under the thermodynamics process in which there is no exchange of heat.

We can say that ΔQ = 0 (ΔQ is heat exchange between the system and the surroundings)

Given:

cm (convex lens)

cm (concave lens)

We know that:

The focal length of the combination:

cm

Since cells A and B are connected in opposite polarities, they cancel e.m.f. of cells of opposite polarity.

The cells are connected in series, hence their e.m.f. adds up.

Now, let us find, the net e.m.f. in the circuit:

Net e.m.f.

Where, corresponds to emf of and having opposite polarity.

Now, let us calculate the current flowing through the circuit.

Since cells are connected each having internal resistance, total resistance in the circuit, is:

Total internal resistances

Now, applying ohm’s law, we know:

Potential difference across two ends of a conductor is directly proportional to the current through the conductor, resistance being the constant of proportionality.

Where,

Potential Difference

Current

Resistance

Therefore,

Net e.m.f.

Putting the values, we get

Where, is the current flowing through the circuit.

Now, potential difference across and =

Let Potential difference across and

So,

Putting the value of , we get

Thus, on solving the equation, we get

So, finally we arrive at,

Electric field lines form closed loops this statement about electric field lines associated with electric charges is false.

The imaginary lines which are used to represent the electric field are called electric field lines. The field lines emerge from a positive charge and terminate at a negative charge. They originate and end at right angles to the surface of the charge. Electric field lines do not make a loop. The magnitude of the electric field will be maximum where the number of field lines is maximum.

Given,

Magnetic field, G

Torque, Nm

As we know,

Magnetic moment of the magnet

Kirchhoff's current law is based on the law of conservation of charge while Kirchhoff's voltage law is based on the law of conservation of energy.

Kirchhoff’s Current Law states that “The algebraic sum of all currents entering and exiting a node must equal zero.” This law describes how a charge enters and leaves a wire junction point or node on a wire.

Kirchhoff’s Voltage Law states that the sum of voltages around a loop is zero.

According to Gauss's law, the electric field inside a conductor is always zero. Therefore, the electric field inside the spherical conducting shell in this case will also be zero.

Cooking with steam is referred to as steaming. Steaming is the cooking method by which Idli is cooked. This is frequently done with a food steamer, which is a kitchen equipment designed expressly to cook food with steam.

Using steam to cook a variety of items is seen to be a healthy cooking method. Because steaming requires less energy to produce and has superior thermodynamic heat transfer.

Plasticizers (UK: plasticisers) or dispersants are additives that increase the plasticity or fluidity of a material. The dominant applications are for plastics, especially polyvinyl chloride (PVC).

The properties of other materials are also improved when blended with plasticizers including concrete, clays and related products.

DOP (Dioctyl pthalate) used in flooring materials, carpets, notebook covers and high explosives, such as Semtex.

DBP (Di-n-butyl pthalate) used for cellulose plastics, food wraps, adhesives, perfumes and cosmetics.

The greater is the value of , the greater is the energy of orbitals.
(i) orbital
(ii) s orbital
(iii) orbital
(iv) orbital
According to the Aufbau principle, energies of above-mentioned orbitals are in the order of-
The increasing order of energy (iv)(ii)(iii)(i)

Ethyl Acetate on treatment with gives 2 moles of Ethyl Alcohol.

For a cell reaction in equilibrium at ,

cell

where K_C = equilibrium constant, n = number of electrons involved in the electrochemical cell reaction.

Given,

or,

or,

In Rutherford's alpha particle experiment, the scattered alpha particle has large deflection angles. This experiment showed that the positive matter of atom was concentrated in a very small volume and it gave the idea of nucleus of an atom.

Trehalose, is a disachharides that is made up of -D-glucopyranosyl-( - -D-glucopyranoside units. While inulin is polysaccharides, raffinose is trisaccharide and cellulose is polysaccharides.

Brownian movement is the random movement of particles in a fluid due to collisions with molecules of the surrounding medium. It is more pronounced for smaller particles than for bigger particles. This is because smaller particles are subject to more collisions with the surrounding molecules, which leads to greater movement.
Sols of metal sulphides are lyophilic, which means they have a strong affinity for the solvent molecules. This results in stabilization of the sol and prevents coagulation.
Hardy Schulze law states that the greater the size of the ions, the greater is their coagulating power. This is because larger ions have a greater charge density, which makes them more effective at neutralizing the charge on the particles in the sol, leading to coagulation.
Charcoal is a highly porous material that is capable of adsorbing a wide range of substances. However, the extent of adsorption depends on the nature of the substance being adsorbed. Chlorine is a highly reactive element and is not easily adsorbed by charcoal. On the other hand, hydrogen sulphide is a relatively weakly reactive gas and can be adsorbed by charcoal.
Therefore, the correct statement among the given options is that Brownian movement is more pronounced for smaller particles than for bigger particles.

Carbon tetrachloride molecule has zero dipole moment even though C and Cl have different electronegativities and each of the C - Cl bond is polar and has some dipole moment. This is because the individual dipole moments cancel out because of the symmetrical tetrahedral shape of the molecule.

The ion contains 4 bond pairs of electrons and 2 lone pairs of electrons. The central iodine atom undergoes hybridization. The expected geometry is octahedral and the actual geometry is square planar. and are tetrahedral in shape.

Germanium (Ge) was discovered later which fit into the empty spaces left by Mendeleev PT and matched to the most properties

Clemens Winkler discovers Germanium.

Germanium belongs to Group 14 and Period 4.

It is a P-Block element, and the atomic number is 32.

Chitin consists of N-acetyl glucosamine. Chitin is the second most abundant biodegradable polymer produced in nature after cellulose. It is an acetylated polysaccharide composed of N-acetyl-d-glucosamine groups linked by β (1→4) linkages.