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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.
| 3101. |
The magnetic effect of current was dicovered by? |
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Answer» Explanation: |
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| 3102. |
An Aluminium wire of length 2m and cross-section area 1.8x 10-6m2 has a resistance of 0.03Ω . Find the resistivity of the Aluminium?Can anyone explain this with correct answer and full steps? |
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Answer» ρ= R A /l = 0.03*1.8x 10-6/2 = 2.7*10^-8 Ω m |
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| 3103. |
The direction of the current in the coil at one end of an electro magnet is is clockwise. The this end of the electromagnet will be? |
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| 3104. |
Find significant figure in following0.12340480.please follow me guys. |
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Answer» Answer: 8 SIGNIFICANT figures Explanation: |
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| 3105. |
Which religion went into decline during the rule of chalukyadynasty? |
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Answer» Answer: The Chalukyas ruled over the Deccan plateau in India for over 600 years. During this period, they ruled as three closely related, but individual dynasties. These are the "Chalukyas of Badami" (also called "EARLY Chalukyas"), who ruled between the 6TH and the 8th century, and the TWO sibling dynasties, the "Chalukyas of Kalyani" (also called Western Chalukyas or "Later Chalukyas") and the "Chalukyas of Vengi" (also called Eastern Chalukyas). |
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| 3106. |
50km East may represent option ,Distance, Displacement, Acceleration,Force |
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Answer» it's REPRESENTING the DISTANCE |
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| 3107. |
The mass of object A is 5kg and B is 8 kg, at rest, the momentum of |
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Answer» <P>Answer: MATE the question is incomplete. For momentum to be calculated p = mv mass and velocity both MUST be there. You have given only mass..... pls check it out and SEND again.. |
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| 3108. |
Calculate a, T1, T2, T'1, T'2Thank you.. |
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| 3109. |
the focal length of a converging lence is 20 a 2cm object is 60from a lence of refractive index is 1.5 find the radius 1 if the curve of the lence |
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Answer» Answer: Focal length = distance between focus and center of curvature =20 cm It is given that object is KEPT at 60 cm from center of curvature since object is beyond 2F. Nature of IMAGE → Real and inverted Size of image → Smaller Position → Between F and 2F on other side of lens. |
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| 3110. |
2. सही कथन के आगे(√ ) का िनशान लगाइए:A. कै लिशयम काब.नेट तनुHCl के साथ अिभ45या कर काबरन डाईऑDसाइड िनEकािसत करता है। |
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Answer» सही है। Explanation: क्युकि जब हम कार्बनिक रसायन को कैल्शियम कार्बोनेट में डाला जाता है तो वह एक प्रकार कि गैस का उत्पादन करता है। |
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| 3111. |
which of the following frequency of sound can be heard by a dog but not by a mean ?(a) 50,000hertz (b)15,000hertz |
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Answer» Answer: 50000 hzs jjjdididhdoid |
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| 3112. |
Surface tension has the samedimensions as those ofOMomentumImpulseOFrequencyO Spring constant |
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| 3113. |
Why solid has definite shape |
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Answer» CHECK it |
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| 3114. |
Two bodies A and B of masses m and 3m are in motion with velocities v and 2v respectively compare their i) inertia ii)their momentum. Answer fast |
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Answer» INERTIA of MOTION is the answer of the question hopes it HELPS |
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| 3115. |
What do you mean by gravity? |
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Answer» it is an ATTRACTION FORCE
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| 3117. |
1 pointA Car of mass 1000 kg ismoving with a speed of 40metre per second. To stop itbrakes are applied. If thebraking force is 4000 then thetime required to stop the carwill beO 5sO 1015sO 20 |
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| 3118. |
D. neither magnitude nor directiond. increases area of contact withb. only directiond. Pac. Nd. frictio3. The force exerted by one object on another by virtue of their masses isa magnetic force b. electrostatic force6. A cricketer catches a ball. The force that comes into play isuation4. Choose the correct answer:2. Force hasa only magnitudeboth magnitude and direction2. The SI unit of force isa.b. kg/m4. Frictiona. produces heatc. opposes motion5. Wheel is made circular because ita. minimizes frictionc. decreases pressure on the roadc. gravitational forceb. causes wear and teard. all of theseb. increases frictiona. contact forcec. frictional forceb. gravitational forced. all of theseH in the blanks |
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| 3119. |
Acid should be added to water but not water to acid ? |
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Answer» Explanation: If you add water to ACID, you FORM an extremely concentrated solution of acid INITIALLY. So MUCH HEAT is released that the solution may boil very violently, splashing concentrated acid out of the container! ... So Always Add Acid to water, and never the reverse. |
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| 3120. |
Electrical resistivity of any given metallic wire depends upon * (a) its thickness (b) its shape (c) nature of the material (d) its length |
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Answer» Answer: (c) nature of material Explanation: if you TAKE a 100 m log wood block , no current will flow; but a 1M silver WIRE will flow very large current so it depends on nature |
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| 3121. |
Write the effect of force on changing the motion of moving object and it's direction . |
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Answer» Answer: If the FORCE is APPLIED in the direction of MOTION of the object, its speed INCREASES. If the force is applied in the direction opposite to the direction of motion of an object then its speed decreases. |
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| 3122. |
समतापी प्रसार के गैस द्वारा किए गए कार्य के लिए व्यंजक |
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Answer» Answer: उन ऊष्मागतिकीय प्रक्रमों (या परिवर्तनों) को समतापी प्रक्रम (isothermal PROCESS) कहते हैं जिनके अन्तर्गत निकाय का तापमान अपरिवर्तित रहे (ΔT = 0)। ऐसी स्थिति तब आती है जब निकाय किसी ऊष्मीय भण्डार (HEAT BATH) के सम्पर्क में हो तथा प्रक्रिया इतनी धीमी गति से हो कि हीट-बाथ के साथ ऊष्मा का आदान-प्रदान करते हुए निकाय अपना तापमान लगभग नियत बनाए रख सके। |
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| 3123. |
Is it possible for a object to describe a curved path if no forward force acts on it? |
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Answer» Answer: no it is not POSSIBLE for a object to DESCRIBE a curved PATH if no FORCE act on it |
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| 3124. |
Wil the mass same on earth and on mars |
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Answer» Answer: Mass of an object REMAINS same irrespective of its location and MOTION in classical mechanics. So mass will be same on both MARS and Earth. However the weight is measure of force exerted by a body on the ground. Hence this value will be AFFECTED by the local value of gravitational ACCELERATION. |
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| 3125. |
How much current will an electric bulb draw from a 220 V source,if the resistance of the bulb filament is 1100 Ω? |
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| 3126. |
What is the angle between maximum value of potential gradient and equipotential surface? |
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Answer» Answer: 90 Explanation: The ANGLE between Electric field and an equipotential surface is ALWAYS 90. This is because,when the potential becomes CONSTANT,the NEGATIVE potential gradient also becomes zero,hence necessitating the need for Electric field to be always normal with surface. |
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| 3128. |
Fast answer this question |
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Answer» OPTION d is DEFINITELY CORRECT |
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| 3129. |
What will be the product of a scalar quantity and a vector quantity? |
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Answer» Answer: yep Explanation: MOSTLY it will be zero or one. DEPENDS on distance pls mark as BRAINLIEST |
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| 3130. |
Write the mathematical formulation of Charles law |
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Answer» Charles' Law Formula and Explanation Charles' Law is a special case of the ideal GAS law. It states that the volume of a fixed mass of a gas is directly proportional to the temperature. This law applies to ideal GASES held at a constant pressure, where only the volume and temperature are ALLOWED to change. |
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| 3131. |
Parallel rays from a distant tree, incident on a concave mirror form an image on the screen. Which diagram shows the formation of image? |
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Answer» c Explanation: real images are ALWAYS INVERTED and CONCAVE mirror always FORMS real image |
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| 3132. |
To what distance the transmission can be made from a T.V tower of height 0.18km,if radius of earth is 6400km? |
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Answer» Answer: 12800.67 Explanation: |
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| 3133. |
Write tha change of effect of force with contact area. |
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Answer» Answer: mark as brainlist Explanation: A force can produce the following effects: A force can move a stationary object. A force can stop a moving object. A force can CHANGE the speed of a moving object. A force can change the direction of a moving object. A force can change the shape and size of an object. May change the speed of an object if it is already moving. For example,CATCHING a BALL hit by a batsman. 3) May change the direction of motion of an object. For example,footballer kicks a moving ball to change its direction. |
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| 3134. |
Section (Any Four)Q-1 Winte two points of difference between clectncal energy and electrical power, |
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Answer» Answer: The fundamental DIFFERENCE between electrical energy and electrical power is that electrical energy represents the amount of WORK done that CAUSES electric current to flow through a CIRCUIT. As against electrical power defines the rate at which work (basically movement of charges) is done in an electrical circuit Explanation: MARK me as brainliest |
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| 3135. |
Q 27 ofMark for reviewThe SI Unit of thermal stressisJoule |
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Answer» Explanation: Temperature and Heat In this section of the chapter, you will learn about the heat and temperature and also about their S.I Unit and the relationship of Fahrenheit and CELSIUS. Heat is the form of energy transferred between two or more systems and its surroundings by virtue of the temperature difference. The S.I unit of heat energy is transferred in Joule (J); 1 cal = 4.186 J Temperature, as defined in the chapter, is the degree of coldness or hotness of the substance. The S.I. unit of temperature is Kelvin (K) and ℃ is the most common unit of temperature. The temperature of a body is measured with the help of a thermometer. The two different scales of temperature Fahrenheit and Celsius are mentioned and the relationship between them is explained. where tc and tf are temperature values of the body on Celsius and Fahrenheit scale. Thermal Expansion Thermal expansion is an increase in the size of a body DUE to temperature. Three different types of expansions have been explained in this chapter which is as mentioned below: Linear Expansion: The increase in the length of a solid on heating is called linear expansion. It is given by the EQUATION: l = l ∞t where l is the original length of any solid, ∆t is the increase in the temperature of the rod. The length so increased is shown by ∆l Superficial Expansion: The increase in the surface area of the solid is known as superficial expansion. Volume Expansion: The increase in the volume of the solid is known as volume expansion. The relationship between the three types of equation is shown by the below equation: Where α, β and γ are not constant, they depend on the temperature range. Newton’s Law of Cooling It is one of the important laws covered under the chapter which states that the rate of heat LOSS of a body is directly proportional to the differences in temperatures between the body and its surroundings. Some more important topics are discussed in this chapter. Important formulae covered in this chapter Thermal Stress = Thermal stress = Y α ∆ t Basic Heat formula Q = m * S * t i.e, Heat required = MASS * specific heat * change in temperature Heat Transfer where K is called thermal conductivity and A is an area of cross-section. |
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| 3136. |
describe an activity to find the magnetic field due to straight wire with diagrams. on what factor magnetic field depend |
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Answer» Answer: a) describe an activity to demonstrate the magnetic field line around a straight current carrying CONDUCTOR. state the rule to determine the direction of magnetic field. (b)- describe an activity to demonstrate the magnetic field line around a circular loop. state the rule to determine the direction of magnetic field. (c)- describe an activity to demonstrate the force acting on a current carrying conductor placed in magnetic field. state the rule to determine the direction of force. 1. The Magnetic field lines around a straight conductor carrying current are concentric circles whose centres lie on the wire. The direction of magnetic field lines can be determined using Right-Hand Thumb Rule. Factors affecting the strength of magnetic field around a straight current carrying conductor 1. Magnetic field strength is directly proportional to the magnitude of current flowing in the conductor. i.e. B∝I, greater the current in the conductor, stronger will be the magnetic field produced. 2. Magnetic field strength is inversely proportional to the distance from the wire i.e. B∝1r, greater the distance from the current carrying conductor, weaker will be the magnetic field. Magnetic Field from Electrical Current Demonstrates that a magnetic field is produced by electric current. 2. The magnetic field lines are concentric circles at every point of a current carrying circular loop. The direction of magnetic field of every section of the circular loop can be FOUND by using the right hand thumb rule. At the centre of the circular loop, The magnetic field lines are straight. Each segment of circular loop carrying current produces magnetic field lines in the same direction with in the loop. The direction of magnetic field at the centre of circular coil is perpendicular to the place of the coil. i.e. along the axis of the coil. Factors affecting the strength of magnetic field 1. The magnitude of magnetic field is directly proportional to the magnitude of current through the loop. i.e. B∝I. 2. The magnitude of magnetic field is inversely proportional to the radius of the circular loop. i.e. B∝1r. The following video EXPLAINS the magnetic field pattern around a circular coil carrying current. 3. - Fleming’s left hand rule. Hold the thumb and the first two fingers of your left hand mutually at right angles to each other . Then if the Forefinger points in the direction of the Field, and the second finger in the direction of the Current, the thumb will point in the direction of Force. hope it will HELP you... mark it as brainliest answer...
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| 3137. |
Why do we not hear the screams of a bat |
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Answer» Explanation:
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| 3138. |
Who ascended the throne after Manglesh? |
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Answer» ANSWER:I Explanation: |
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| 3139. |
What is the scientific name for the following the number of vibrations made per second |
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Answer» FREQUENCY is the answer |
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| 3140. |
।प्रश्न-13 एक उत्तल लेंस के गोलीय पृष्ठों की वक्रता त्रिज्याएँ क्रमश: 15 सेमी. और 10 सेमी. हैं। यदि लेंस का[सूत्र 1 + हल 2-3]अपवर्तनांक 1.5 हो तो लेंस की फोकस दूरी ज्ञात कीजिए। |
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| 3141. |
Which is the mos dangerous equation formula used by einstein ? |
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Answer» Answer: e=mc 2 The obvious WINNER in this is Einstein's ICONIC equation e=mc 2, for it provides a MEASURE of the ENORMOUS energy hidden within ordinary matter. Its destructive capability was recognized by Leo Szilard, who then instigated the sequence of events that culminated in the construction of ATOMIC bombs. |
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| 3143. |
-8 रबर और स्टील (लोहा) में कौन अधिक प्रत्यास्थ है? कारण बताएँ। |
Answer» रबर और स्टील (लोहा) में स्टील अधिक प्रत्यास्थ है।इसके कारण निम्न हैं... स्टील रबर की अपेक्षा सरलता से विरूपित हो जाता है। यांत्रिकी के संदर्भ में यंग गुणांक अथवा यांग मापांक किसी पदार्थ की प्रत्यास्थता पैमाना होता है। यह एक अक्षीय प्रतिबल और विकृति के अनुपात के रूप में परिभाषित किया जाता है। चूँकि स्टील का यंग गुणांक (यांग मापांक) रबर की तुलना में अधिक होता है, इस कारण स्टील रबर की अपेक्षा अधिक प्रत्यास्थ होता है। प्रत्यास्थता से तात्पर्य पदार्थ के उस गुण से है, जिसमें किसी पदार्थ पर उसकी लंबाई के अनुदिस उपयुक्त बल लगाने पर उसके आकृति और आकार दोनों में परिवर्तन हो जाता है, लेकिन जब वह बल हटा लिया जाता है तो वह पदार्थ अपनी पूर्व अवस्था को प्राप्त कर लेता है। पदार्थ का यह गुण प्रत्यास्थता (ELASTICITY) कहलाता है ☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼☼ |
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| 3144. |
State one observation from everyday life which shows that sound travel much more slowly than light |
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Answer» Explanation: State an observation from everyday life which shows that SOUND travels much more slower than light. It is common observation that in the rainy SEASON, the FLASH of LIGHTNING is seen first and the sound of thunder is heard a little later. That's because, speed of light is very high as COMPARED to speed of sound in air. |
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| 3145. |
Is my answer correct.....please anyone answer it quickly........ |
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Answer» it will be option b) curvilinear Explanation: |
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| 3146. |
An electric motor lifts a 8 kg box vertically through 2.5 m in 10s. The power produced by the motor is: |
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Answer» m = 8kg , H = 2.5 m , t = 10s .... let s" represent power s" = work /t = FSCosø /t = mg S cosø /t = {8 * 10 * 2.5 * cos 0 / 10 } W = {20 * cos 0}W = 20W ........ hope it helps. .............. |
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| 3147. |
A particle has both velocity and acceleration vector anti is notparllel to each other the motion particle is |
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Answer» POTENTIAL motion is the answer hope it HELPS you have a great day |
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| 3148. |
if you want to hear a train approaching from far away, why is it more conveient to put the ear to the track |
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Answer» Answer: it is because track is MADE up of solid IRON which is a metal and metal is CONSIDERED as a BEST sonorous that's why we are able to hear the vibration of a highly SPEED train from far apart.. |
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| 3149. |
A system consisting of two blocks movee over asmooth surface when a horizontal force is 10N is applied on it. find the tensionin the connecting string and the acceleration of the system. Neglecting friction |
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Answer» Answer: T = M( m +M)/10 where M and m are masses of BLOCK and m is the MASS on which HORIZONTAL FORCE is applied Explanation: |
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| 3150. |
What is gravity and what are it's drawback |
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Answer» Answer: One DISADVANTAGE of GRAVITY (which Tommy alludes to) is that it is an ever-present force that MUST be accounted for in all our scientific experiments and observations— we can't avoid it, and we can't cancel it out for long, sitting at the bottom of Earth's gravity WELL (which is the deepest of any planet in the inner ... Hope it HELPS you.. |
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