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Ohm’s Law gives the relation between?

Why are protons positively charged, electrons negatively charged and neutrons have neither negative or positive charge?

Name a source of light which emits light and heat simultaneously.

Statement 1: Dynamo is used to generate electricity in thermal and hydropower plants.
Statement 2: Dynamo converts Mechanical energy from turbine to electrical energy.

The velocity of a body, starting at rest and freely falling towards Earth, after one second is ___ m/s. (Round your answer to the nearest integer)

Which of the following forces is not considered as a contact force in Mechanics?

Suppose a body A at a higher temperature is brought into contact with another body B at a lower temperature. What happens to the temperature of both the bodies?

The process of splitting of white light into its constituent colours is called ___ .

If Ethan covered 225 km in 90 minutes, what is his average speed?

Mention five differences between an electromagnet and permanent magnet. [5 MARKS]

The upper standard point in celsius scale is

An express train going towards Delhi is travelling at a speed of $90km/h$. Brakes are applied so as to produce a uniform acceleration of $–0.5m/s^2$. Find how far the train will go before it is brought to rest.

Describe the process of Photosynthesis.

One microsecond is equal to.. ... Second

Which mirror is used in rear view and why?

When a force is applied on a wire of uniform cross-sectional area $3\times {10}^{-6}{m}^2$and length $4m$, the increase in length is $1mm$. Energy stored in it will be

$(Y=2\times {10}^{11}N{m}^{-2})$

A man lifts a suitcase wighing 10 kg from the ground and puts it on his head 1.7 m above the ground. Calculate the work done by him on the suitcase.

The wind blows _____.

Y-Y=(R+G)-(R+G)

Yellow light is allowed to pass through a yellow paper.

Where is the power of the earth's magnet the most

Which thermometer is used to measure the extreme temperatures of the day reported in a newspaper?

Andy and Sandy can run at a speed of 40 cm/s and 50 cm/s respectively. They start their race at 9:00 am. Considering that they are travelling at a uniform speed in the same direction, find the distance between them at 9:20 am.

Question 6

The time period of a simple pendulum is the time taken by it to travel from

(a) A to B and back to A

(b) O to A, A to B and B to A

(c) B to A, A to B and B to O

(d) A to B

Cubic-meter is the unit of ___ .

Why cannot the white light be having Vibgyor in air? Why only when the light passes through two mediums?

What of the following is in uniform motion?

A rainbow is a spectrum of ________.

The formula (or mathematical expression) that represents Ohm's law is:-

The length of following cuboid is:

A refrigerator has to transfer an average of $263J/s$ of heat from temperature $-10{}^{\circ }$C to $25{}^{\circ }$C. What will be the average power consumed by the refrigerator? (Assume no power loss in the process)

There are two school bags A and B. Bag A is provided with a broader strap, while bag B is provided with a thinner strap. For the same load, a schoolboy likes bag A as he is comfortable with it but with bag B, he develops a pain in his shoulders. This is because:

___and___ are the different parts of shadows created by any light source after being partially obstructed by an opaque object.

A ball is rolled on sand, on a cemented road and on an ice platform. In which of these cases will it move the farthest?

Two sound waves, named A and B, are travelling in air. If, wave A has a time period of 2 seconds and an amplitude of 3 cms and wave B has a time period of 3 seconds and an amplitude of 11 cms, then which of the following statements are correct?

In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because:

What is the KINETIC ENERGY of a body travelling through a Zig-Zag path?(since velocity of a body is the distance travelled by a body per unit time in a specific direction.)

Respected mentors,

This is Vyom Chaturvedi. I am confused about the topic of Cyclones and Thundestorms .

I am confused about the definition of Lightning.

Please help me.

Regards,

Vyom

A bus is running at a uniform speed. It covers a distance of 435 km in 6hours . How much will it cover in 8 hours

Please give me the answer soon

What is the significance of word 'thermal' in thermal power generation?

Question 1 (a)
Fill the missing word in the blank spaces in the following statements:
(a) Wind is $\underset{–}{}$ air.

The defination of MOTION is as follows:-

"A body is said to be in motion if it's position changes with time with respect to its surroundings."

While we are traveling in a train we see the trees move according to our surroundings or our reference frame.So,are they really in motion?If no then why?If yes then how?

I have a glass of water at room temperature, kept inside a closed room. I get a hot mug of coffee, keep it on another table, and get so busy I completely forget about it. As the coffee cools down, what happens to the temperature of the glass of water?