Electric Charge and Resistance Units in Physics
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Questions and Answers

Which of the following is the SI unit of the universal constant of gravitation?

  • Nm/kg^2
  • N/m^2kg^-2 (correct)
  • N/m
  • kg/ms

What is the SI unit of weight, which represents the force on an object due to gravity?

  • Force (correct)
  • Impulse
  • Mass
  • Acceleration

Which two physical quantities share the same unit of measurement?

  • Force and Dyne
  • Pressure and Force
  • Force and Weight (correct)
  • Force and Speed

What is the SI unit of Newton, in relation to physical quantities?

<p>Weight and Force (B)</p> Signup and view all the answers

Which pair of physical quantities do NOT have the same SI units?

<p>Momentum and Universal constant of gravitation (C)</p> Signup and view all the answers

What is the dimensional formula for weight or force?

<p>[MLT^-2] (D)</p> Signup and view all the answers

What is the SI unit of resistance?

<p>Ohm (C)</p> Signup and view all the answers

Which physical quantity is measured in ohms?

<p>Resistance (A)</p> Signup and view all the answers

What is the SI unit of stress?

<p>N/m2 (D)</p> Signup and view all the answers

Which unit represents the flow of electric charge per second across a wire?

<p>Ampere (A)</p> Signup and view all the answers

What does the SI unit Coulomb represent?

<p>Charge (D)</p> Signup and view all the answers

Which physical quantity does the unit Ohm relate to?

<p>Resistance (C)</p> Signup and view all the answers

What is the gravitational potential energy of an object at a point above the ground defined as?

<p>The work done to lift it from the ground to the point opposite to gravity (C)</p> Signup and view all the answers

A bullet fired from a gun has the maximum what?

<p>Kinetic energy (A)</p> Signup and view all the answers

If a force of 20 N displaces an object through 2 m and does a work of 20 J, what is the angle between the force and displacement?

<p>60° (B)</p> Signup and view all the answers

If a car of 800 kg increases its speed from 5 m/s to 10 m/s, what is the work done?

<p>30 kJ (D)</p> Signup and view all the answers

If an object of 1 kg is dropped from a height of 30 m, what is the work done by the force of gravity?

<p>300 J (D)</p> Signup and view all the answers

If a porter raises a 12 kg object from the surface of the Earth and puts it 1.5 meters above the surface on his head, what is the work done by the porter?

<p>216 J (C)</p> Signup and view all the answers

What is the primary function of a voltmeter?

<p>To measure the potential difference between two points in a circuit (D)</p> Signup and view all the answers

Which type of voltmeter displays the measured voltage as a numerical value?

<p>Digital voltmeter (B)</p> Signup and view all the answers

What is the primary function of a galvanometer?

<p>To detect and indicate the presence of an electric current (A)</p> Signup and view all the answers

Which instrument would be most appropriate for measuring the voltage across a battery?

<p>Voltmeter (C)</p> Signup and view all the answers

If a galvanometer is used to detect the presence of an electric current, what would indicate the direction of the current?

<p>The rotary deflection of the needle (C)</p> Signup and view all the answers

Which instrument would be least suitable for measuring voltage in a circuit?

<p>Barometer (D)</p> Signup and view all the answers

Which of the following is used to measure the strength of winds?

<p>Beaufort scale (A)</p> Signup and view all the answers

What are Korotkoff sounds associated with?

<p>Measuring blood pressure (B)</p> Signup and view all the answers

If a household consumes 100 units of energy in 5 days, how much energy is this in Joules?

<p>$3.6 \times 10^8$ J (A)</p> Signup and view all the answers

Which of the following instruments does NOT measure the same quantity as the others?

<p>Tintometer (B)</p> Signup and view all the answers

What is the primary purpose of the Beaufort scale?

<p>To measure the strength of winds (B)</p> Signup and view all the answers

Which of the following units is used to measure energy consumption in households?

<p>Units (C)</p> Signup and view all the answers

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