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Question & Answers

Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

What is the difference between resistance and resistivity?

Distinguish between resistance and resistivity. Derive an expression for the effective resistance of a number of resistors connected in series and parallel.

1 Answer
  • Difference between
  • NEB2068
  • resistance
  • resistivity
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

Explain the theory of series and parallel combinations in an electric circuit.

Explain the theory of a) series and b) parallel combinations of resistance in an electric circuit.

1 Answer
  • NEB2069SSETB
  • resistors in parallel
  • resistors in series
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

Define emf, terminal potential difference, and internal resistance. Derive the relation between them for the circuit drawing current.

Define emf, terminal potential difference, and internal resistance. Derive the relation between them for the circuit drawing current.

1 Answer
  • emf
  • internal resistance
  • NEB2071S
  • potential difference
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

What is the difference between electromotive force (emf) and potential difference (pd)?

What is the difference between electromotive force (emf) and potential difference (pd)?

1 Answer
  • Difference between
  • emf
  • NEB2071S
  • potential difference
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

Define galvanometer. Why should the resistance of a voltmeter be high?

What is galvanometer? How can you convert it into a voltmeter? Why should the resistance of a voltmeter be high?

1 Answer
  • galvanometer
  • NEB2074S
  • reasoning problem
  • resistors
  • voltmeter
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

State and explain Joule’s law of heating. Deduce an expression for heat developed in a conductor due to the passage of an electric current.

State and explain Joule's law of heating. Deduce an expression for heat developed in a conductor due to the passage of an electric current.

1 Answer
  • conductor
  • heat conductor
  • joule's law of heating
  • NEB2075SETB
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

How is the current established in a conductor when it is connected across a source of emf?

Discuss how the current is established in a conductor when it is connected across a source of emf. Derive the relation J = nev, where the symbols have their usual meaning.

1 Answer
  • conductor
  • current
  • current density
  • NEB2060
  • NEB2076SETC
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

State Joule’s law of heating and verify it experimentally.

State Joule's law of heating and verify it experimentally.

1 Answer
  • joule's law of heating
  • NEB2076SETB
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

How is a shunt used to convert a galvanometer into an ammeter?

What do you mean by shunt? Describe its use in converting a galvanometer into an ammeter.

1 Answer
  • ammeter
  • galvanometer
  • NEB2076SETB
  • shunt
Pathshala Nepal
2 years ago Grade -12 (NEB) > Science Physics DC Circuits, Electricity & Magnetism

Why do we use connecting wire made up of copper?

Why do we use connecting wire made up of copper?

1 Answer
  • connecting wire
  • copper
  • NEB2056
  • resistance
  • 1
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