Physics 2003 JAMB Past Questions

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The force on a charge moving with velocity v in a magnetic field B is half of the maximum force when the angle between v and B is

A. 90^o
B. 45^o
C. 30^o
D. 0^o

View Answer & Discuss (14) JAMB 2003

The maximum kinetic energy of the photoelectron emitted from a metal surface is 0.34eV. If the work function of the metal surface is 1.83eV,find the stopping potential.

A. 2.17V
B. 1.49V
C. 1.09V
D. 0.34V

View Answer & Discuss (5) JAMB 2003

When an alternating current given by I = 10sin (120π)t passes through a 12Ω resistor, the power dissipated in the resistor is

A. 1200W
B. 600W
C. 120W
D. 30W

View Answer & Discuss (25) JAMB 2003

In a semi conductor junction diode, as the depletion or barrier layer is forward-biased, the layer

A. widens
B. narrows
C. remains constant
D. widens then narrows

View Answer & Discuss (12) JAMB 2003

The major difference between a pure semiconductor and a pure metal is that

A. metals are harder than semiconductor
B. while resistance of metals decrease with temperature , the reverse is the case for semiconductor
C. the resistance of metals increases with temperature, while for semiconductors, it is the reverse
D. metals have forbidden gaps while semiconductors have not

View Answer & Discuss (4) JAMB 2003

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Physics 2003 JAMB Past Questions

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