What is the primary purpose of lightening rod?

Q: Determine the tension developed in each cord required for equilibrium of the 20-kg lamp. Determine…

A: Given Mass of lamp, m=20 kg Standard Quantities g=9.8 m/s2

Q: Which of the following are protective measures against nonionizing radiation from heat lamps?*…

A: SOlution: The protective measures for the non-ionizing radiation like UV and IR rays

Q: The grey circle below represents a compass. If it had a needle, which way would it be pointing? *

A: The given grey circle represents a compass. to find : the direction of needle in which it would…

Q: dentify the types of energy transformat A flashlight uses a battery to create current and that…

A: we can change energy from one form to another but energy will be constant on these transformation .…

Q: How wall of electrical kettle use infrared

A: The body of electrical kettle is consist of stain steel or plastic.

Q: The base of an electric iron is brightly polished mainly so that ........ ?

A: An electric iron, converts Electrical energy to Heat energy.

Q: إذا قام موصل بتيار 200 مل لي أمبير يمر -5 عبره بتحويل 40 جول من الطاقة الكهربائية إلى حرارة في 30…

A: Given : I = 200 mA = 0.2 A H = 40 J t = 30 s

Q: ateral trian e at pt. P.

A:

Q: What is the standard unit of energy?

A: Energy can be expressed in terms of various units such as electron volts, Calories and Joules.

Q: Bulbs convert the energy of moving charge to light and heat True or False?

A: Energy conversion in light bulb:

Q: Mineral-insulated cables are not used in. O computers O smoke control systems O alarm circuits O…

A: Mineral insulated cables are made using copper conductors put inside sheath of copper. Inorganic…

Q: 3)2 find total uIHent 6 52 blowing in circut AAA 15V

A:

Q: Does the voltage output increase when a generator is made to spin faster? Defend your answer.

A: Given: Voltage output

Q: What is the power dissipated in R? O 1 watt 4.3 watts O 3 watts

A:

Q: A school classroom having a general dimension of 20 ft x 40 ft is to be lighted at an average…

A: The number of fixture is calculated by using the given expression below. Here, L, fc, A represent…

Q: What energy transformation occurs from a light bulb?

A: A light bulb converts electrical energy into radiant energy in the forms of visible light and…

Q: what is an example of a pseudoscience explanation of why lightning travels through the air?

A: We have to explain why lightning travels through the air.

Q: What is the law of quantinisation of mechanical energy?

A: Q Given that Quantization of energy

Q: The inner most layer of an optical fiber is called Select one: O a. coating b. core c. cladding d.…

A: Optical fiber consists of three layer basically core , Cladding and outer coating. Inner layer is…

Q: . Create a good label (name) for each signal described below: (a)*A sensor outputs a LOW when the…

A:

Q: What Is the relationship of conductance with conductivity?

A: Conductivity:  Voltage require to set an amount of electrical current to flow is called as…

Q: what does electric current produce ?

A:

Q: What comes to your mind when you hear the word energy?

A: The first thing that comes to the mind on hearing the word "Energy", is the strength needed for…

Q: After running a comb through your hair, how do the hairs behave when the comb comes close to them?…

A: After running a comb through your hair, how do the hairs behave when the comb comes close to them is…

Q: When you rub a piece of ebonite (very hard, black rubber) across a piece of animal fur which…

A: On rubbing a piece of material with another we are doing charging by method of friction.  In method…

Q: 90 10 80 20 193|1|2|3|4|5|6|| 30 -70 001 60 40 50

A: The least count written is 0.001

Q: You see a lightning bolt. If you hear thunder 3 seconds later, how far away was the strike. How…

A: In air speed of sound is 343 m/s. Since someone hear after 3 seconds. so, distance traveled by sound…

Q: 20ks 38kg where anter of gravsty? gravi,?

A: Mass of first object = m1 = 20 kg Mass of second object = m2 = 30 kg Distance of first object from…

Q: 90 ka 2.1 ka B= 80 fe = 15.30 10 ka 250 a

A: Given Data : The value of Re=15.3Ω

Q: Object Material Observation copper Light bulb lights up rubber Light bulb does not light up aluminum…

A: As per the given question ,     Copper  Light bulb light up  rubber Light bulb does not light…

Q: What is relation connecting absorptive, reflecting and transmitting power of a body?

A: For a given time, the amount of radiations reflected by a body in the form of Thermal radiation to…

Q: Slip rings are usually made of   A) Aluminium B) Copper C) Phosphor Bronze D) Carbon

A: Answer: Slip Ring: The term slip ring is represented as the device which transmits power as well as…

Q: ot a 51 g ring consta tched by 0. s the pebble

A: We know that As per given The catapult is initially stretched by  x =0.2 m  The pebble files let a…

Q: The outer most layer of an optical fiber is called Select one: a. core O b. cable jacket Oc cladding…

A: An optical fiber works on the principle of Total Internal Reflection, wherein the light undergoes…

Q: A body which absorbs or emits radiation ideally is referred to as a perfect ........ reflector…

A:

Q: Determine the tension developed in each cord required for equilibrium of the 20-kg lamp. Determine…

A: At joint D, the free body diagram is

Q: The filament of a bulb glows due to?

A: The filament of an electric bulb glows because of the heating effect of electric current. As the…

Q: what is a light bulb in the modern age?

A: Ever since Thomas Edison invented the light bulb , the world has changed a lot. Although Edison…

Q: d. A cor js n moving on rood at 16 m/s.It js accelesatid a Atraight at 10 m/2. What will be its 1…

A: Given data :              Initial velocity = U              Acceleration = a             Time = t…

Q: In Davy's safety lamp a copper gauze is used. Why?

A: Davy’s safety lamp was used in flammable environment such as coal mines. The lamp consists of a…