InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2701. |
What is a fuse ?Why is it called a safety device ? |
|
Answer» Solution :A fuse is a piece of wire of a metal or an alloy of low melting point and and is connected in SERIES with an electric circuit. If a current LARGER than the specified VALUE flows through an electric circuit temperature of fuse wire rises beyond its melting point and the fuse malts.As a result, the electric circuit BREAKS. As a result, damage to electric circuitdue to flow of excessive current (either due to short circuiting or over LOADING) is prevented due to this very reason fuse is called a safety device. |
|
| 2702. |
State how sperms move towards the female germ cell. |
| Answer» Solution :The sperms enter through the vaginal PAIN during sexual INTERCOURSE they travel UPWARDS and REACH the oviduct where they may ENCOUNTER the egg. | |
| 2703. |
Out of the parameters : temperature, pressure, work and volume, which parameter does not characterise the thermodynamics state of matter ? |
| Answer» SOLUTION :DECREASE in INTERNAL ENERGY. | |
| 2704. |
In the above example, the work done is mini- mum when the body is |
|
Answer» pushed over an inclined plane |
|
| 2705. |
Name three improved characteristics of wheat that helped India to achieve high productivity. |
|
Answer» Solution :AIDS is not transitted by touch or any physical contact. HIV is generally transmitted by (a) Sexual contact with infected person. (B) Use of contaminated or infected blood or blood products, needles or syringes. (c ) By the use of contaiminated needles or syringes. (d) From infected mother to her CHILD through placenta. (ii) (a) HIGH yielding (b) Semi - dwarf (c ) Fertilizer responsive |
|
| 2706. |
How does the size of the image change as the object is brought closer from infinity towards the convex lens? |
| Answer» Solution :The size of the image formed keeps on increasing as the OBJECT is BROUGHT CLOSER towards the CONVEX lens. | |
| 2707. |
Name two human body organs where magnetism produced is significant. |
|
Answer» |
|
| 2708. |
"Wearing helmet and fastening the seat belt is higly recommended for safe journey" justify your answer using Newton's law of motion. |
|
Answer» Solution :(i) According to Newton.s second Law, when you fall from a BIKE on the ground with a force equal to your mass and acceleration of the bike. According to Newton.s Third Law, an equal and OPPOSITE reacting force on the ground is exerted on your body. When you do not wear a helmet, this reacting force can cause fatal head injuries. So it is important to wear helmet for a safe journey. (ii) inertia in the reason that people in cars need to wear seat belts. A moving car has inertia, and so do the riders inside it. When the driver applies the BRAKES, an UNBALANCED force in applied to the car. Normally the bottom of the seat applies an unbalanced force friction which slows the riders down as the car slows. If the driver stops the car SUDDENLY, however this force is not exerted over enough time to stop the motion of the riders. Instead, the riders continue moving forward with most of their original speed because of their inertia. |
|
| 2709. |
Refractive index of glass, kerosene and water are 1.5, 1.44 and 1.33 respectively. Arrange them in ascending order of their optical density. |
|
Answer» Solution :In ascending ORDER of their optical DENSITY the SUBSTANCES are : WATER `lt` kerosene `lt` GLASS. |
|
| 2710. |
What is vo-efficientor real expansion ? |
| Answer» SOLUTION :Coefficient of real expansion is defined as the RATIO of the true rise in the volume of the LIQUID PER degree rise in temperature to its unit volume. The SI unit of coefficient of real expansion is `K^(-1)` | |
| 2711. |
The headquarter of National Disaster Response Force is located in |
|
Answer» NEW Delhi |
|
| 2712. |
A potential difference of 10 V is needed to make a current of 0.02 A flow through a wire. What potential difference is needed to make a current of 250 mA to flow through the same wire? |
|
Answer» Solution :According to the Ohm.s LAW, `R = V/I` So, `R = 10 /0.02` `=500 Omega` Now, to MAKE a current of 250 mA = `250 XX 10^(-3) A`to flow through the same WIRE, the required potential difference is `V = IR = 250 xx 10^(-3) xx 500 = 125V` |
|
| 2713. |
Explain the appplications of convex lenses used in the following instruments. Simple microscope |
|
Answer» Solution :Conves lenses are used in the following instruments. 1.SIMPLE microscope: A single CONVEX LENS of small focal length can be used in a simple microscope . A magnification of about 20 times is obtained by simple microscope. Watch REPAIRERS, JEWELERS, etc. use it. 
|
|
| 2715. |
R=(rhol)/(A) On what does the resitance of a metal depend ? |
| Answer» SOLUTION :The RESISTANCE of a metal depends on temperature, NATURE the material, length and area of the CROSS section. | |
| 2716. |
Which of the following decides the sex of the child ? |
|
Answer» MALE GAMETE i.e. , SPERM |
|
| 2717. |
What is heating effect of electric current? |
| Answer» Solution :When electric current is passed through a RESISTOR, electrical ENERGY is dissipated and APPEARS as heat energy. | |
| 2718. |
Which of the following is not a natural resource? |
|
Answer» Mango tree |
|
| 2719. |
Draw ray diagram in each of the following cases to show what happens atfer reflection to the incident ray when it is parallel to the principal axis and falling on a convex mirror. |
Answer» SOLUTION :APPROPRIATE RAY DIAGRAMS are DRAWN here
|
|
| 2720. |
The sulphides ores are strongly heated in air: Roasting :: The carbonates ores are strongly heated in a limited supply of air : __________ |
| Answer» SOLUTION :CALCINATION | |
| 2721. |
Draw ray diagram in each of the following cases to show what happens atfer reflection to the incident ray when it is falling on a concave mirror while passing through its principal focus. |
Answer» SOLUTION :APPROPRIATE RAY DIAGRAMS are DRAWN here
|
|
| 2723. |
Which defect of vision can be rectified using a convex lens ? |
| Answer» SOLUTION :HYPERMETROPIA or LONG SIGHTEDNESS. | |
| 2724. |
Wester Ghats spreads over which states ? |
| Answer» SOLUTION :Western GHATS SPREADS over the states of Gujarat, MAHARASHTRA, Goa, Tamil NADU and Kerala | |
| 2725. |
Give reason for the Fuse wire is placed in series with the device. |
| Answer» Solution :It melts and STOPS the flow of any unduly HIGH electric CURRENT and breaks the circuit. | |
| 2727. |
Draw ray diagram in each of the following cases to show what happens atfer reflection to the incident ray when it is coming oblique to the principal axis and falling on the pole of a convex mirror. |
Answer» SOLUTION :APPROPRIATE RAY DIAGRAMS are DRAWN here
|
|
| 2728. |
What is social health? |
| Answer» SOLUTION :SOCIAL health is the ability of a person to establish RELATIONSHIP with other persons. | |
| 2729. |
How is heat produced in a conductor by an electric current? |
| Answer» Solution :Heat produced in a CONDUCTOR by an electric current is due to COLLISIONS of FREE electrons with the IONS and atoms in the conductor. | |
| 2730. |
All the distances are measured from the …………..Of the lens. |
|
Answer» CENTER of curvature |
|
| 2731. |
In which of the following velocity (v) - time (t) graphs, the instantaneous acceleration decreases with time? |
|
Answer»
|
|
| 2732. |
Aerobic respiration |
| Answer» SOLUTION :Cellular respiration TAKING place in presence of oxygen is known as aerobic respiration. | |
| 2733. |
What is refraction? |
|
Answer» |
|
| 2734. |
As wemove away from a current -carrying straight wire , themagnetic field of wirevaries as……..(Where, r is thedistancebetweena given pointand the wire ). |
|
Answer» `R^(2)` |
|
| 2735. |
An object kept 60 cm from a lens gives a virtual image 20 cm in front of the lens . What is the focal length and power of the lens ? Is it is converging lens or diverging lens ? |
|
Answer» SOLUTION :Data : `u=-60 cm, v=-20 cm, f=?` `1/f =1/v -1/u =(1)/(-20 cm)-(1)/(-60 cm)` `=-((1)/(20 cm)-(1)/(60cm))=-((3-1)/(60cm))` `=-(2)/(60cm)=-(1)/(30cm)` `therefore ` The focal length of the LENS , f=-30 cm. As f is NEGATIVE , it is diverging lens. |
|
| 2736. |
State the effect of a magnetic field on the path of a moving charged particle |
| Answer» SOLUTION : It can DEFLECT the PATH of the CHARGED PARTICLE | |
| 2738. |
Two bulbs are having the ratings as 60 W, 220 V and 40 W, 220 V respectively. Which one has a greater resistance? |
|
Answer» <P> Solution :electric POWER `P=(V^(2))/(R )`For the same value of V,R is inversely proportional to P. Therefore, LESSER the power, greater the RESISTANCE Hence, the bulb with 40W, 220 V rating has a greater resistance. |
|
| 2739. |
___________ forcekeeps the satellitein its orbit . |
| Answer» SOLUTION :CENTRIPETAL | |
| 2740. |
…………always prefer the company of friends and follow their good or bad habits instead of following advice of parents and techeers. |
|
Answer» |
|
| 2741. |
_____________ are two elements which are radioactive with atomic number less than 83. |
| Answer» SOLUTION :TECHNETIUM (TC) and PROMETHIUM (PM) | |
| 2742. |
The diagram below (Fig.1.32) shows a uniform bar supported at the middle O. A weight of 40gf is placed at a distance 40cm to the left of point O. How can you balance the bar with the weight of 80gf. |
| Answer» SOLUTION :By PLACING the WEIGHT of 80 gf at a distance 20CM to the right of point O. | |
| 2743. |
Current passes from __________ potential to the _________ potential. |
| Answer» SOLUTION :HIGHER, LOWER | |
| 2744. |
Refraction of light passing through a glass slab. |
Answer» SOLUTION :
|
|
| 2745. |
Which method of crop improvement can be practised by a farmer if he is in experienced? |
|
Answer» Clonical SELECTION |
|
| 2746. |
Choose the only correct option in case of a concave mirror: |
|
Answer» |
|
| 2747. |
A stationary charge is placed in a magnetic field. Will it experience a force ? Give reason to justify your answer. |
| Answer» SOLUTION :No, a magnetic field EXERTS a FORCE only on MOVING charges. | |
| 2748. |
Shekhar was observed a bulb and asked some questions to you. Those are Why does it used as a filament ? |
| Answer» Solution :The FILAMENT of an electrical BULB is usually made with tungsten, because of its higher RESISTIVITY and MELTING POINT `(3422^(@)).` | |
| 2749. |
Which of the two in the following sets belong to the same trophic level ? |
| Answer» Solution :Frog, Lizard | |
| 2750. |
Absence of genetic recombination is an advantage whereas rapidity of the process is a drawback of asexual reproductive method. |
|
Answer» |
|
