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Physics Past Questions

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1,904 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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1,904 questions

Question 1 of 20 1,904 total questions

Question 301

waec 2013

Which of the following statements about the use of radioisotopes is not correct? They are used to

Ainduce mutations in plants and animals to obtain new and improved varieties

Btrace the paths of metabolic processes in plants and animals

Cestmate the age of rocks

Dlocate broken bones

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Question 302

waec 2013

Which of the following particles are termed nucleons in a neutral atom?

Aprotons and neutrons

Bneutrons and electrons

Cprotons and electrons

Dprotons, electrons and neutrons

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Question 303

waec 2013

The minimum energy required to cause photoelectric emission when the surface of a metal is irradiated with electromagnetic radiation of suitable frequency is called

Acritical energy

Bionization energy

Cwork function

Dplanck's constant

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Question 304

waec 2013

The work function of a metal is 2.56 x 10^-19J. Calculate the frequency of a photon whose energy is required to eject from the metal an electron with kinetic energy of 3.0ev. [1 eV = 1.6 x 10^-19J, h = 6.6 x 10^-34Js]

A5.56 x 10¹⁹Hz

B1.66 x 10¹⁹Hz

C1.12 x 10¹⁵Hz

D8.42 x 10¹⁴Hz

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Question 305

waec 2013

A coil of inductance 0.12 H and resistance 4\(\Omega\), is connected across a 240V, 50Hz supply. Calculate the current through it. [\(\pi\) = 3.142]

A6.3A

B33.3A

C37.2A

D40.0A

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Question 306

waec 2013

Which of the following devices does not makes use of eddy current for its action? A/An

Agalvanometer

Bspeedometer

Cinduction furnace

Dinduction coil.

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Question 307

waec 2013

The capacitance of parallel plates capacitors varies

Ainversely as the square of the distance between the plates

Bdirectly as the square of the distance between the plates

Cinversely as the distance between the plates

Ddirectly as the distance between the plate

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Question 308

waec 2013

Which of the following instruments is used to determine the accurate value of the electromotive force of a cell?

Avoltmeter

Bmeterbridge

Cvoltameter

Dpotentiometer

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Question 309

waec 2013

A potential difference of 12V is applied across the ends of a 6\(\Omega\) resistor for 10 minutes. Determine the quantity of heat generated

A720J

B1200J

C14400J

D43200J

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Question 310

waec 2013

A charge of 2.0 x 10\(^{-5}\) C experiences a force of 80N in a uniform electric field. Calculate the magnitude of the electric field intensity

A8.0 x 10⁶ NC^-1

B4.0 x 10⁶ NC^-1

C4.0 x 10⁴ NC^-1

D2.0 x 10⁴ NC^-1

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Question 311

waec 2013

When a person holds a negatively charges metal rod and stands bare-footed on the ground, how will the charges leak?

Anegative charges flows to the ground through the person's body

Bpositive charges flow from the ground through his body to neutralize the negative charges

Cpositive charges in the air neutralizes the negative charges the person is holding

Dnegative charges will leak through the air

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Question 312

waec 2013

Which of the following statements about waves in pipes is correct?

Afor open pipes, there is only one end correction to be accounted for

Bfor closed pipes, there are two end corrections to be accounted for

Conly odd harmonics are possible in closed pipes

Dall harmonics are possible in closed pipes

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Question 313

waec 2013

A string under tension produces a note of frequency 14Hz. Determine the frequency when the tension is quadrupled.

A14Hz

B18Hz

C28Hz

D56Hz

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Question 314

waec 2013

Which of the following radiations has it's frequency lower than that of infrared radiation?

AUtra-violet rays

Bgamma rays

Cx-rays

Dradio waves

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Question 315

waec 2013

Which of the following statements about the Galilean telescope is not correct?

Athe final image is inverted

Bit is shorter than terrestial telescope

Cthe final image is erect

Dit has a small field of view

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Question 316

waec 2013

A diverging lens of focal length 30cm produces an image 20cm from the lens. Determine the object distance

A10cm

B12cm

C50cm

D60cm

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Question 317

waec 2013

The refractive index of a material is 1.5. Calculate the critical angle at the glass-air interface

A19^o

B21^o

C39^o

D42^o

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Question 318

waec 2013

Images formed by a convex mirror are always

Amagnified

Bbehind the mirror

Creal

Dinverted

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Question 319

waec 2013

At which position should an object be placed in front of a concave mirror in order to obtain an image which is of the same size as the object?

Aat the centre of curvature

Bat the principal focus

Cbetween the pole and principal focus

Dbetween the centre of curvature and principal focus

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Question 320

waec 2013

The equation of a certain progressive transverse wave is y = 2 sin 2 \(\pi ( \frac{t}{0.01} - \frac{x}{30})\), where x and y are in cm and t in seconds. Calculate the period of the wave.

A0.001s

B0.010s

C10.000s

D100.000s

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