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Find the least count of a milliammeter in which there are 20 divisions between 400mA and 500mA.

The Least count = range/no.of divisions No. of divisions = 20 Range = 500 – 400 = 100 So the... View Article

Name the physical quantity whose unit is Volt/ ampere.

The physical quantity having unit volt/ampere is known as resistance . It has a dimension of ML2 T-3 I-2 where... View Article

What is the mass of photon in motion?

A photon has energy E = hf where h is Planck’s constant and f is the frequency of the photon.... View Article

Which force is responsible for the stability of our universe?

The gravitational force is responsible for the stability of the universe.The gravitational force on Earth is equal to the force... View Article

What is the Dimensional formula for solar constant?

The solar constant is defined as the solar energy incident per unit area per second on earth. [Solar constant] =... View Article

What is the value of current through a 2-ohm resistor?

Let x be the voltage at the junction of 10v 20v and 1 ohm respectively. (x-10)/2 + (x-0)/1 + (x-20)/4... View Article

Explain the terms the average velocity and instantaneous velocity. When are they equal?

Answer: The meaning of velocity of an object can be defined as the rate of change of the object’s position... View Article

State True or False: Nodes and servers have the same function.

Any system or device connected to a network is also called a node. It has an IP address which helps... View Article

Diamond rings occur in which type of solar eclipse? a) total solar eclipse b) partial solar eclipse c) None of these

The Baily’s beads effect , or Diamond ring effect , is a feature of total and annular solar eclipses .There... View Article

what indicates the motion of earth when a person jumps from a boat on the shore the boat starts moving in the opposite direction?

According to Newton’s third law, to every action, there is an equal and opposite reaction. When we jump on the... View Article

What is deforming force and restoring force?

If a force is applied on a material body; it produces a change in the normal position of its molecules.... View Article

What is the dimensional formula of pressure difference?

Pressure is the force per unit perpendicular area over which the force is applied, p=F/A. Dimensional formula of pressure difference... View Article

An ammeter has a range of 0 – 3 ampere and these are 30 divisions on its scale. Calculate the least count of the ammeter.

Range of ammeter AR = 3 ampere. The number of divisions in ammeter is 30. Therefore, the least count of... View Article

What does the following device measure in car (1) odometer (2) speedometer

The speedometer of a car measures instantaneous speed of the car. Odometer is a device used to record the distance... View Article

An electric oven of 2kW power rating is operated in a domestic electric circuit that has a current rating of 5A. If the supply voltage is 220V, what result do you expect? Explain.

Answer: Power (P) = 2kw =2000W Current (I) = 5A Voltage (V) = 220V Power = current × voltage P... View Article

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